Author name: Paul Patrick

nasa’s-acting-chief-“angry”-about-talk-that-china-will-beat-us-back-to-the-moon

NASA’s acting chief “angry” about talk that China will beat US back to the Moon

NASA’s interim administrator, Sean Duffy, said Thursday he has heard the recent talk about how some people are starting to believe that China will land humans on the Moon before NASA can return there with the Artemis Program.

“We had testimony that said NASA will not beat China to the Moon,” Duffy remarked during an all-hands meeting with NASA employees. “That was shade thrown on all of NASA. I heard it, and I gotta tell you what, maybe I am competitive, I was angry about it. I can tell you what, I’ll be damned if that is the story that we write. We are going to beat the Chinese to the Moon.”

Duffy’s remarks followed a Congressional hearing on Wednesday during which former Congressman Jim Bridenstine, who served as NASA administrator during President Trump’s first term, said China had pulled ahead of NASA and the United States in the second space race.

“Unless something changes, it is highly unlikely the United States will beat China’s projected timeline to the Moon’s surface,” said Bridenstine, who led the creation of the Artemis Program in 2019. China has said multiple times that it intends to land taikonuats on the Moon before the year 2030.

A lot of TV appearances

Duffy’s remarks were characteristic of his tenure since his appointment two months ago by Trump to serve as interim administrator of the space agency. He has made frequent appearances on Fox News and offered generally upbeat views of NASA’s position in its competition with China for supremacy in space. And on Friday, in a slickly produced video, he said, “I’m committed to getting us back to the Moon before President Trump leaves office.”

Sources have said Duffy, already a cabinet member as the secretary of transportation, is also angling to remove the “interim” from his NASA administrator title. Like Bridenstine, he has a capable political background and politics that align with the Trump administration. He is an excellent public speaker and knows the value of speaking to the president through Fox News. To date, however, he has shown limited recognition of the reality of the current competition with China.

NASA’s acting chief “angry” about talk that China will beat US back to the Moon Read More »

bmw-debuts-6th-generation-ev-powertrain-in-the-all-electric-ix3

BMW debuts 6th-generation EV powertrain in the all-electric iX3


Class-leading efficiency and computer-controlled driving dynamics combine.

A BMW iX3 drives towards the camera

The new iX3 marks the start of a new design language for BMW SUVs. Credit: BMW

The new iX3 marks the start of a new design language for BMW SUVs. Credit: BMW

BMW has an all-electric replacement for its X3 crossover on the way. When it arrives in mid-2026, it will have the lowest carbon footprint of any BMW yet, thanks to an obsessive approach to sustainability during the design process. But we knew that already; what we couldn’t tell you then, but can now, is everything else we know about the first of the so-called Neue Klasse electric vehicles.

“The Neue Klasse is our biggest future-focused project and marks a huge leap forward in terms of technologies, driving experience, and design,” said BMW chairman Oliver Zipse. “Practically everything about it is new, yet it is also more BMW than ever. Our whole product range will benefit from the innovations brought by the Neue Klasse—whichever drive system technology is employed. What started as a bold vision has now become reality: the BMW iX3 is the first Neue Klasse model to go into series production, kicking off a new era for BMW.”

A new face

The iX3 also debuts a new corporate face for BMW’s SUVs: From now on, these will have tall, narrow kidney grilles like the one you see here, as opposed to the short, wide grille seen on the front of the Neue Klasse sedan (which is almost certainly the next 3 Series). LEDs replace chrome, and there’s a new take on BMW’s usual four headlights, although the illuminated kidney grill is an option, not mandatory. Despite the two-box shape, the iX3 manages a drag coefficient of just 0.24.

Sixth-generation

As befitting a company called the Bavarian Motor Works, BMW has been in the business of designing and building its own electric powertrains for quite some time, in contrast to some rivals that have been buying EV tech from suppliers. In addition to the class-leading manufacturing efficiency, the sixth-generation electric powertrain should be extremely efficient—around 4 miles/kWh (15.5 kWh/100 km) from an SUV-shape, which is 20–25 percent better than current SUV EVs.

The first variant will be the iX3 50 xDrive, which boasts a combined 463 hp (345 kW) and 475 lb-ft (645 Nm) from its pair of motors. The front axle uses an asynchronous motor, with an electrically excited synchronous motor at the rear axle providing most of the power.

There’s 40 percent more regenerative braking than BMW’s current powertrains. We weren’t given an exact threshold where the friction brakes take over, but it should be around 0.5–0.6 G. That means that the iX3 will regeneratively brake for the overwhelming majority of the time—just 5–10 percent of braking events should require the friction brakes, we’re told. And the regen should be smoother and more precise, as well as quieter than before. There’s even some regenerative braking should the ABS trigger.

A BMW iX3 is parked, charging

NACS port comes standard, with a CCS1 adapter. Credit: BMW

For the Neue Klasse, BMW has moved to a new 800 V battery, using cylindrical cells rather than the prismatic cells you’d find in an iX or i4. Energy density is 20 percent greater than the current cells, and the pack has a usable capacity of 108 kWh. That means you can expect a range of up to 400 miles, although the official EPA rating will only arrive next year.

The new pack charges a lot faster, too. It can accept up to 400 kW, should you find a charger capable of such power. If so, the 10–80 percent charge should take 21 minutes. (BMW also says it will add 230 miles in 10 minutes.) The iX3 is capable of acting as a mobile power bank (V2L) as well as powering a home or even the grid (this requires a V2H-capable wall box), and North American iX3s will sport NACS charging ports.

Software-defined

The Neue Klasse is a clean-sheet design, and BMW has used this as an opportunity to clear out the legacy cruft that has accumulated over the years. Instead of hundreds of discrete black boxes, each with a single electric control unit (ECU) performing a single job, the iX3 uses four high-performance computers, each in charge of a different domain. Among the benefits of this approach? Almost 2,000 feet (600 m) less wiring and a weight saving of about 30 percent compared to a conventional wiring loom with all its ECUs. Taking single-function controllers out of the loop and replacing them with a domain computer also cuts latency.

The Heart of Joy is the domain controller responsible for driving dynamics and the powertrain, and can cope with up to four electric motors, something we should see in electric M-badged Neue Klasse models in the future. But good driving dynamics require more than just a fancy computer brain. The iX3 is extremely stiff, with the front and rear axles mounted to the battery pack. Weight distribution is a near-perfect 49: 51.

BMW iX3 inteiror

The interior is quite faithful to the concept we saw last year. The black strip at the base of the windshield is the panoramic display. Credit: BMW

A different domain controller is in charge of the advanced driver assistance systems (ADAS). This water-cooled computer is 20 times faster than the processors that control the ADAS in a current BMW, and was developed in-house by BMW. The automaker says the focus is always on the driver’s needs in a way that is smart, symbiotic, and safe. There are AI/ML algorithms for perception and planning, but safety-proven rule-based algorithms always have the final say in the decision-making process.

There’s a hands-free, partially automated driving system that works at up to 85 mph (136 km/h) on premapped divided-lane highways, and an interesting new feature is the cooperative braking and steering during active assistance. Unlike just about every car on the road currently, using the brake will not immediately kill the cruise control, and if you intentionally cross the median or a lane marker and are looking where you’re going, the eye-tracking driver monitoring system sees you and won’t try to correct. (But if you veer across the lane and aren’t looking, the car will steer you back.)

Shy tech

The iX3’s interior is near-identical to the concept we saw last March. BMW calls this approach shy tech, where controls or displays are invisible when inactive. There’s a new multifunction steering wheel—that will surely be divisive—which puts the ADAS controls on its left side, and media controls on the right. The iDrive rotary controller is no more, but there are plenty of physical buttons (not capacitive ones) for things like windows and mirrors.

BMW says the rotary controller wouldn’t have worked well with the new iDrive UI for the trapezoidal touchscreen. (Additionally, it told us that in some regions, drivers never used the rotary controller at all.) The screen is closer to the driver than in current BMWs, and the trapezoidal shape rather effectively means the left side of the screen—which has persistent, common functions—is always close to your right hand. After playing with the system for a while, I think the UI is a lot easier to navigate than the current BMW infotainment system, good though that is.

The multifunction steering wheel looks unconventional. BMW

I’ve often been complimentary about voice recognition in BMWs, and the iX3 has an upgrade here. The natural language processing is now based on Alexa, not Cerence’s tech, and there’s a cartoon visualization for the personal assistant that looks a bit like a ninja, or perhaps an alien. This will make eye contact with the person giving voice commands, so it can discern between driver and passenger.

At the base of the windshield is the new panoramic display. This presents information in zones—you can personalize what shows up in the center and right zones, but the one in front of the driver will always be the critical stuff like your speed and any warnings or alerts. There’s also an optional heads-up display.

BMW says we can expect the iX3 50 eDrive to arrive in the US next summer, starting at around $60,000.

Photo of Jonathan M. Gitlin

Jonathan is the Automotive Editor at Ars Technica. He has a BSc and PhD in Pharmacology. In 2014 he decided to indulge his lifelong passion for the car by leaving the National Human Genome Research Institute and launching Ars Technica’s automotive coverage. He lives in Washington, DC.

BMW debuts 6th-generation EV powertrain in the all-electric iX3 Read More »

rfk-jr.-says-covid-shots-still-available-to-all-as-cancer-patients-denied-access

RFK Jr. says COVID shots still available to all as cancer patients denied access

Here are some key moments from today’s hearing:

Untrustworthy

With the fallout ongoing from the abrupt ouster of CDC Director Susan Monarez last week, many senators focused on what led to her downfall. In a Wall Street Journal op-ed published two hours before the hearing, Monarez confirmed media reports that she had been fired by Kennedy for refusing to rubber-stamp changes to CDC vaccine guidance based on recommendations from Kennedy’s hand-selected advisors.

“I was told to preapprove the recommendations of a vaccine advisory panel newly filled with people who have publicly expressed antivaccine rhetoric,” Monarez wrote in the op-ed. She said she refused, insisting that the panel’s recommendations be “rigorously and scientifically reviewed before being accepted or rejected.”

In today’s hearing, Senators directly confronted Kennedy with that statement from the op-ed. Kennedy repeatedly said that she is lying and that he never directed her to preapprove vaccine recommendations. Instead, he claims, he told her to resign after he asked her directly if she was a trustworthy person, and she replied, ‘No.”

After several exchanges about this with other senators, Bernie Sanders (I-Vt.) picked it apart further, saying:

“Are you telling us that the former head of CDC went to you, you asked her, ‘Are you a trustworthy person?’ And she said, ‘No, I am not a trustworthy person,'” Sanders asked.

“She didn’t say ‘No, I’m not a trustworthy person,'” Kennedy replied. “She said, ‘No.’ I’m giving a quote.”

After that, Sen. Thom Tillis (R-NC), who seemed skeptical of Kennedy’s arguments generally, pointed out the absurdity of the claim, quoting Kennedy’s previous praise of Monarez. “I don’t see how you go—over four weeks—from a public health expert with ‘unimpeachable scientific credentials,’ a longtime champion of MAHA values, caring and compassionate and brilliant microbiologists, and four weeks later fire her,” Tillis said.  “As somebody who advised executives on hiring strategies, number one, I would suggest in the interview you ask ’em if they’re truthful rather than four weeks after we took the time of the US Senate to confirm the person.”

RFK Jr. says COVID shots still available to all as cancer patients denied access Read More »

covid-vaccine-locations-vanish-from-google-maps-due-to-supposed-“technical-issue”

COVID vaccine locations vanish from Google Maps due to supposed “technical issue”

Vaccine results in Maps

Results for the flu vaccine appear in Maps, but not COVID. The only working COVID results are hundreds of miles away.

Credit: Ryan Whitwam

Results for the flu vaccine appear in Maps, but not COVID. The only working COVID results are hundreds of miles away. Credit: Ryan Whitwam

Ars reached out to Google for an explanation, receiving a cryptic and somewhat unsatisfying reply. “Showing accurate information on Maps is a top priority,” says a Google spokesperson. “We’re working to fix this technical issue.”

So far, we are not aware of other Maps searches that have been similarly affected. Google has yet to respond to further questions on the nature of the apparent glitch, which has wiped out COVID vaccine information in Maps while continuing to return results for other medical services and immunizations.

The sudden eroding of federal support for routine vaccinations lurks in the background with this bizarre issue. When the Trump administration decided to rename the Gulf of Mexico, Google was widely hectored for its decision to quickly show “Gulf of America” on its maps, aligning with the administration’s preferred nomenclature. With the ramping up of anti-vaccine actions at the federal level, it is tempting to see a similar, nefarious purpose behind these disappearing results.

At present, we have no evidence that the change in Google’s search results was intentional or targeted specifically at COVID immunization—indeed, making that change in such a ham-fisted way would be inadvisable. It does seem like an ill-timed and unusually specific “technical issue,” though. If Google provides further details on the missing search results, we’ll post an update.

COVID vaccine locations vanish from Google Maps due to supposed “technical issue” Read More »

hollow-knight:-silksong-is-breaking-steam,-nintendo’s-eshop

Hollow Knight: Silksong is breaking Steam, Nintendo’s eShop

An influx of players excited for this morning’s launch of Hollow Knight: Silksong are encountering widespread errors purchasing and downloading the game from Steam this morning. Ars Technica writers have encountered errors getting store pages to load, adding the game to an online shopping cart, and checking out once the game is part of the cart.

That aligns with widespread social media complaints and data from DownDetector, which saw a sudden spike of over 11,000 reports of problems with Steam in the minutes following Silksong‘s 10 am Eastern time release on Steam. The server problems don’t seem to be completely stopping everyone, though, as SteamDB currently reports over 100,000 concurrent players for Silksong as of this writing.

Ars also encountered some significant delays and/or outright errors when downloading other games and updates and syncing cloud saves on Steam during this morning’s server problems. The Humble Store page for Silksong currently warns North American purchasers that “We have run out of Steam keys for Hollow Knight: Silksong in your region, but more are on their way! As soon as we receive more Steam keys, we will add them to your download page. Sorry about the delay!”

The PC version of Silksong currently seems to be available for purchase and download without issue. Ars was also able to purchase and download the Switch 2 version of Silksong from the Nintendo eShop without encountering any errors, though others have reported problems with that online storefront [Update: As of 11:18 am, Nintendo is reporting, “The [Nintendo eShop] network service is unavailable at this time. We apologize for any inconvenience this may cause].” The game is still listed as merely “Announced” and not available for purchase on its PlayStation Store page as of this writing.

Hollow Knight: Silksong is breaking Steam, Nintendo’s eShop Read More »

new-ai-model-turns-photos-into-explorable-3d-worlds,-with-caveats

New AI model turns photos into explorable 3D worlds, with caveats

Training with automated data pipeline

Voyager builds on Tencent’s earlier HunyuanWorld 1.0, released in July. Voyager is also part of Tencent’s broader “Hunyuan” ecosystem, which includes the Hunyuan3D-2 model for text-to-3D generation and the previously covered HunyuanVideo for video synthesis.

To train Voyager, researchers developed software that automatically analyzes existing videos to process camera movements and calculate depth for every frame—eliminating the need for humans to manually label thousands of hours of footage. The system processed over 100,000 video clips from both real-world recordings and the aforementioned Unreal Engine renders.

A diagram of the Voyager world creation pipeline.

A diagram of the Voyager world creation pipeline. Credit: Tencent

The model demands serious computing power to run, requiring at least 60GB of GPU memory for 540p resolution, though Tencent recommends 80GB for better results. Tencent published the model weights on Hugging Face and included code that works with both single and multi-GPU setups.

The model comes with notable licensing restrictions. Like other Hunyuan models from Tencent, the license prohibits usage in the European Union, the United Kingdom, and South Korea. Additionally, commercial deployments serving over 100 million monthly active users require separate licensing from Tencent.

On the WorldScore benchmark developed by Stanford University researchers, Voyager reportedly achieved the highest overall score of 77.62, compared to 72.69 for WonderWorld and 62.15 for CogVideoX-I2V. The model reportedly excelled in object control (66.92), style consistency (84.89), and subjective quality (71.09), though it placed second in camera control (85.95) behind WonderWorld’s 92.98. WorldScore evaluates world generation approaches across multiple criteria, including 3D consistency and content alignment.

While these self-reported benchmark results seem promising, wider deployment still faces challenges due to the computational muscle involved. For developers needing faster processing, the system supports parallel inference across multiple GPUs using the xDiT framework. Running on eight GPUs delivers processing speeds 6.69 times faster than single-GPU setups.

Given the processing power required and the limitations in generating long, coherent “worlds,” it may be a while before we see real-time interactive experiences using a similar technique. But as we’ve seen so far with experiments like Google’s Genie, we’re potentially witnessing very early steps into a new interactive, generative art form.

New AI model turns photos into explorable 3D worlds, with caveats Read More »

putin:-“immortality”-coming-soon-through-continuous-organ-transplants

Putin: “Immortality” coming soon through continuous organ transplants

In a later press conference, Putin confirmed the discussion and said that “life expectancy will increase significantly” in the near future and “we should also think about this” in terms of political and economic consequences. (In Russia, life expectancy has actually decreased significantly in recent years, and the overall population is declining.)

The brief snippets of conversation suggest that immortality is on the minds of the world’s strongmen, though it’s interesting to see how it takes a different form than in Silicon Valley, where robots and software are more often seen as the key to longevity instead of, say, recurring organ transplants into an aging bag of skin.

Shows like Upload and Alien: Earth present visions of a world in which consciousness can be scanned by machines and perhaps even loaded into other machines. Meanwhile, Putin and Xi are thinking more about repeated organ transplants and life extension rather than “the Singularity.”

So, which dystopic future are we more likely to get? (Yes, I am presuming, based on the current state of the world, that the near future will be pretty dystopic. I think it’s a good bet.) Clones being raised for organ transplants, as in Kazuo Ishiguro’s novel Never Let Me Go? Or some kind of “download your consciousness into this machine” situation in which the mind of Elon Musk inhabits one of his beloved Tesla robots for all eternity? Given either alternative, I’m not entirely sure I’d want to live forever.

Putin: “Immortality” coming soon through continuous organ transplants Read More »

startup-roundup-#3

Startup Roundup #3

Startup Roundups (#1, #2) look like they’re settling in as an annual tradition.

I’ve been catching up on queued roundups this week as the family was on vacation. I am back now but the weekly may be pushed to Friday as I dig out from the backlog.

There is a common theme to the vignettes offered across the years. The central perspective has not much changed.

I would summarize the perspective this way, first in brief and then with more words:

  1. Founding SV-style startups or being an early employee is great alpha.

  2. You create more value, and you capture more of that value.

  3. Building real things that scale is so valuable that you can afford a lot of nonsense.

  4. Venture capital similarly does foolish stuff a lot but the successes are so good that if they have good deal flow they still win.

  5. Venture capitalists and others offering advice say many valuable things but also have their own best interests at heart, not yours, and will lie to you.

Or, with more words:

  1. The central idea of founding or joining as an early employee of a startup, building something people want, raising venture capital funding in successive rounds and mostly adhering to Silicon Valley norms is an excellent one. If you have the opportunity to do YC you probably want to do that too.

  2. Because you get equity you capture a vastly higher percentage of the value you create than you would if you worked for someone else. This is all a great way to change and improve the world, and also a great way to earn rather quite a lot of money. This is risky in the sense that most of the time your startup will fail, but failure is not so bad and you can try again in various ways. If you’re up for it, strongly consider doing it.

  3. This works because the value in building real things that scale, at all, is orders of magnitude higher than the value of an ordinary job, plus you are capturing far more of it. The structure is hugely inefficient and wasteful and stupid and perverse in various ways, most of your activity is likely going to be built around assembling and selling the team and proving that it can Do The Thing, and learning how to Do The Thing, but it does result in attempting to Do The Thing at all, which is what matters. There is ‘a lot of ruin’ in this nation.

  4. Venture capital returns, and especially the strong returns of the best VCs, are largely about selection and deal flow, and marketing themselves. The VCs tend to herd to an extent that it should challenge one’s overall epistemology and model of capitalism, and have similar flawed heuristics and are largely evaluating whether other VCs will be willing to fund in the future, and evaluating the team and its ability to pitch itself, and so on. Which again is hugely inefficient and wasteful and stupid and perverse compared to how it would ideally work, and it leaves a ton on the table, but it Does The Thing at all, so it beats out all the alternatives.

  5. Venture capitalists will offer you lots of free advice, which as we know is seldom cheap. A lot of what they say is good advice, and you need to absorb their culture, but a lot of it is them talking their books and marketing themselves and the idea of doing a startup, or trying to get you to do what the VCs want to do for various reasons. Some of that will align with what is good for you. A lot of it won’t, and you have to keep in mind that when your interests are in conflict they are lying liars who lie, and at other times they fool themselves or don’t understand.

  6. In particular, VCs and Paul Graham in particular will try to pretend that ‘what you do to succeed outside of fundraising’ and ‘how to set yourself up to fundraise’ are the same question, or have the same answer, and you should not think of this as a multi-part strategic problem. This is very obviously an adversarial message.

  7. This type of adversarial message will happen one-to-many in general advice, and will also happen one-to-one when they talk to you. Listen, but also be on guard.

Here are some vignettes on this theme from the past year.

Emmett Shear offers advice on how to interpret advice from Paul Graham.

According to Emmett:

  1. Filter his creative ideas, but pay attention, there’s gold in them hills.

  2. If Paul tells you how a decision gets made, he’s often right even if he isn’t telling you the whole picture.

  3. Paul’s advice is non-strategic, he’s saying what his model thinks you should do.

My reactions based on what I know, keeping in mind I’ve never met him:

  1. Strongly agree, same as his public ideas.

  2. Based on his public statements, I’d say he’s bringing you a part of the picture, often an important or neglected part, but he’s often being strategic in how it is presented and framed, and in particular by the selection effect of when to explain what parts, and what parts to leave out.

  3. I strongly believe many Paul Graham statements in public are strategic. I also think Paul’s model in many places is at least partially strategically motivated. Even if his motivation in the moment is non-strategic, the process that led to Paul having that opinion was, de facto, strategic.

    1. I can believe that Paul’s private advice is mostly non-strategic beyond that.

Given the overall skill and knowledge levels, with that level of trustworthiness, that’s still an amazingly great source of information. One of the best. Use it if you have access to it.

One common pattern of advice from Paul Graham has been talking up the UK.

Rohit: This is a pretty remarkable tweet, and a sign of the times.

Paul Graham (April 15, 2025): A smart foreign-born undergrad at a US university asked me if he should go to the UK to start his startup because of the random deportations here. I said that while the median startup wasn’t taking things to this extreme yet, it would be an advantage in recruiting.

What an interesting twist of history it would be if the UK became a hub of intellectual refugees the way the US itself did in the 1930s and 40s. It wouldn’t take much more than what’s already happening.

It has lower GDP per capita, but it also has rule of law.

G: what if it was Europe instead of the UK? would you still recommend?

Paul Graham: It’s the same tradeoff, yes.

Graham agrees the regulatory burdens of being in Europe are extreme, so for now he sees a mixed strategy as appropriate. Those who are worried about being in America can be recruited to the UK or Europe, which justifies (in his mind) more UK-or-Europe-based startups than we currently have.

Paul Graham is the best case scenario. When you see advice from other venture capitalists, assume they are less informed and skilled, and also more self-interested, until proven otherwise.

Zain Rizavi: wild that it only took 4 months of building to realize I’d take back nearly every piece of “advice” I gave founders over 4.5 years investing. Most VC advice is cosplay

Martin Casado: yup

Martin Casado has been on an absolute ‘saying the quiet part out loud’ tear recently. No matter how vile and bad faith I find his statements about AI policy and existential risk and everything surrounding effective altruism and so on, he’s got the Trump-style honest liar thing going especially on the venture side, and yes it is refreshing.

Never conflate the medium and the message, or the map and the territory, or the margin and the limit.

I don’t think Paul is being naive here.

I think he is doing a combination of thinking on the margin and talking his book:

Paul Graham: Figuring out what a startup should say to investors is strangely useful for figuring out what it should actually do. Most people treat these questions as separate, but ideally they converge. If you can cook up a plausible plan to become huge, you should go ahead and do it.

For example, I’m always looking for ways to add network effects to a startup’s idea. Investors love those. But network effects are genuinely good to have. So any we come up with in order to feed to investors, they should probably go and make happen.

Experienced investors are pretty rational. But those are the ones you want anyway.

Should you be thinking big, and about what scales, and taking big swings? Absolutely, although the VCs want you to do it more than you should want to do it due to different incentives.

On the margin, founders benefit from VCs pushing founders to do more of the things that VCs want to hear, as a lot of why they want to hear them is that those actions correlate with big success. The danger is when you are not on the margin, and stop being grounded in reality and start to believe your own hype and stories.

If you have the option to do YC, rest assured that as long as you’re not collapsing a huge bunch of SAFEs the valuation boost from YC’s reputation is worth vastly more than the share of your company YC takes. You’ll be net ahead on cash and equity very quickly.

Matt Levine has often mentioned how valuable it can be to not have to mark your investments to market. Early stage VCs are experts at controlling how and when their investments are marked to different numbers.

Joe Weisenthal (April 21, 2025): Blackstone is now down 40% from its November highs, and is right back at its post-Liberation Day lows. Remember, this is probably the best run manager of private assets in the world, so just consider how your run of the mill PE or VC shop is looking right now.

Paul Graham: Early stage VCs are presumably looking better, because an early stage investment in a startup is mostly a bet on whether the founders are Larry & Sergey or not, and that is independent of global political and financial trends.

Joe Weisenthal: Sure, but that only pertains to an individual bet, not the entire asset class, right?

Paul Graham: You mean the value of a sufficiently large number of such bets should vary with the market’s expectations about future growth? In theory yes. But in practice not so much.

In practice the effects on early stage valuation are muted by (a) the fact that big exits, where all the returns are, will be 10 years in the future or more, and (b) the dynamics of fundraising; there’s no such thing as value investing at the seed stage.

There are certainly ups and downs in early stage startup valuations, but they’re driven mostly by variations in how excited investors are about startups. E.g. valuations are high now because investors are (justifiably in my opinion) excited about AI.

Mr. Plumpkin: Not how math works sorry. The difference between them building a $1T company and a $2T company due to market valuations still impacts the option math today.

Paul Graham: Only by 2x, whereas great vs ok founders can increase the outcome by 1000x or more.

Yes, that would be only by 2x, but that’s a 50% markdown.

This is purely not marking to market and strategic ignorance about market prices. It is price fixing by a VC cabal via norms. It is a conspiracy in restraint of trade and collective fiction.

Sure, the best founders might increase value by 1000x, but the best founders under bad conditions are then worth 500x of what the bad founders were worth under good conditions, rather than 1000x. Still counts.

What Paul Graham is effectively saying here is that VCs are a conspiracy in restraint of trade, that (among other things) refuses to pay fair prices for top startups, instead setting what are effectively highly constrained norm-based prices to avoid the best founders charging what they are worth, so top VCs can bid with reputations and connections and capture that surplus rather than bidding against each other with dollars.

I do believe this is true. The top VCs are in collusion to bid with reputation and services and connections and future promises rather than with dollars, such that the top investments are both obvious to most VCs and also vastly cheaper than their expected value. And they persuade the founders involved that this is good, actually, because of things like worries about a down round.

Graham himself has noted that the difference in price for the best startups is dwarfed by how much better their prospects are, that the smart VC mostly ignores price. That indicates the prices for the good prospects are way too low.

Whereas if a top founder actually got what they were on average worth, VCs who invest would be unsure if they were getting a great deal.

Why should the VCs get that deep discount to actual value, despite the fact that if the founder insisted plenty of those same VCs would pay up happily? Because they tell a story that the company isn’t entitled?

And if you can get away with that, then yeah, who cares if the exit value is down by half, I guess? It doesn’t change any of the norm-based prices? And for worse founders, instead of the prices dropping so the market clears, a few survive and lot of those deals die.

One of the best reasons to distrust VCs is that they make a lot of arguments that you should beware when they give you ‘too good’ a deal, including but not limited to them paying more money to get less, and instead you should give away additional large stakes in your company or other things specifically in order to ensure the vibes remain good and you can tell a story to future other VCs.

As in, because you might have to raise at a lower number in the future, you should raise at a lower number than that now, so you don’t have a ‘down round.’ Or because you couldn’t handle having the cash.

I do agree that ‘down rounds’ can kill companies and that is bad, but come on.

Paul Graham: Believe it or not, it’s dangerous for a startup to raise too much at too high a valuation. This sounds like a good problem to have, but it isn’t. Both make your next round harder.

Raising too much makes you spend too much, which makes it harder to reach profitability. And a high valuation makes it harder for the next round to be an up round, which both investors and founders prefer.

Why do founders raise too much at too high a valuation? Because most VCs want to own a large percentage of the company. They’re less price sensitive though. They’re willing to spend a lot to get it. So the result of these constraints is: large investment at a high valuation.

That last paragraph is a partial answer to an importantly different question: ‘Why are founders sometimes ABLE to raise so much money, at such a high valuation, that it becomes difficult to have an ‘up round’ next?’

Yes, the answer is that VCs are ‘not price sensitive’ when deciding to invest (there are limits, eventually, of course, at least one hopes), they are ‘vibe sensitive’ to whether it all feels right and how it would look. And they have heuristics that say, if the deal is great, you do not care about the price, the real danger is missing out. The ultimate case of FOMO. So in many cases you can kind of ‘name your price.’

It is also a hell of a thing to frame getting a great deal that way.

The second paragraph points to the real danger. You cannot afford to let what happened go to your head. You cannot afford to then spend money like you are actually worth what the VCs paid, and that you will soon be able to raise more at an even higher number.

Instead, you need to do something rarely done, which is to understand that the number was ‘too high’ and that you might face a down round.

You know what I’ve never heard of being done? A founder CEO says, after a round, ‘these VCs went completely crazy bidding against each other. We raised $20m at a $100m valuation, and realistically it should have been less than half of that. We made damn sure the terms were airtight, so we can safety do a down round if needed, and we are setting aside the extra money so we don’t go too big or spend too much, and we’re setting your options deals accordingly.’

This also makes good trading sense. Most startups have high failure risk at each step, so if you survive you should be worth more. But if you’re the ‘super hot’ startup, in a great spot, the chance of (unrecoverable) failure in the short term could be quite low. If you do great, you’ll gain tons of value. So if you do only okay, it seems perfectly fine to say the expected value is modestly down from before.

There is the danger that you overspend, grow too big, your burn rate skyrockets, your focus is lost and so on, if you’re not careful. So… don’t do that? I know, easier said than done, but not as hard as they make it sound.

Convincing founders they should give up 10% of their company so that the round isn’t technically ‘down’ is one of the great cons of history. One can also call it an illegal conspiracy in restraint of trade.

Europe in general and Germany in particular have long been doing a natural experiment to see how annoying and expensive you can make startups before you kill them entirely. The answer is quite a lot.

Nathan Benaich: 12 hours and counting – notary reads every single word of Series A docs in Germany out loud in front of founders. In person. Guys, we have GDP to grow here. Pure prehistoric madness.

Paul Graham: We can use this practice as a canary in the coal mine to measure whether Germany is serious about startups. As long as it persists, they’re not.

Ian Hogarth: The most significant cost of the Germany notary system is how much friction it introduces for small investors ie angel investors. Always created a higher hurdle for me to angel invest in German start-ups/or introduce angel investors.

Henry de Zoete: 100% – same for me. It’s not worth the hassle for angel investors

Alex MacDonald: I once had to physically go to the German consulate in London in order to get a document ‘apostilled’ to complete an angel investment.

Never invested in another German company after that. 🫡

A fun story about correlation and causation.

Trevor Blackwell: How to be a top VC with one simple trick:

Auren Hoffman: one of the firms we invested in recently raised their Series A. To start the process, the company sent emails to many VCs. stats on raise:

The top branded partners at the top branded firms: almost all responded to the email within 4 hours. All wanted to set up a meeting within a day.

The top branded partners at the mid-tier firms: usually needed to receive 2 emails to set up a mtg. Mostly requested mtgs within 4 days of 2nd email.

The low-tier firms: had the lowest response rate. Many times they wanted to set up a mtg 2-3 weeks out. They all missed seeing the deal.

I’m surprised that the top-tier firms are more responsive than the low-tier firms but kinda makes sense. Always be hustling.

I do think responding quickly is the best play whenever possible. But consider that the firms might be responding more optimally than you might think.

Say you’re at a low-tier firm. If you take the meeting tomorrow, and they give you that meeting, and you love it, and it closes next week, guess what?

You still probably didn’t make the round, because the startup has better options and turns down your money. In a different world you’d be able to compete on price, but that’s not how this works, so you lose. Good day, sir.

By scheduling two weeks out, you’re saving everyone time – that’s the point at which the round is likely actually available and so the meeting is worthwhile.

That’s not to discount that hustle and fast response also make a difference, but in general if you see a contrast this stark there’s an actually good reason for it.

Whereas if you are a top firm, your entire job is to quickly find the best offers like this, and lock them down before the mid-tier firms or ideally even your top-tier competitors can do an evaluation and try to box you out. You have to hustle.

The question is why anyone puts their money in, it’s obvious why you would want to do the job with other people’s money:

Sam Altman asks a good question: this is much less important than tweeting about agi, but it is nevertheless amazing to me that the entire venture industry can (in aggregate) lose money for so long and keep getting funded.

I am very curious why LPs do it.

(obviously if you can fund the top funds you should!)

My hunch is that a lot of this is people not understanding adverse selection. They don’t get how much those top funds are cherry picking the best deals, and how much this leaves everyone else in VC at a severe disadvantage. And more of that is thinking that oh, I’m smarter or I’ve found the smart one, we will make it work, or people simply not realizing that ‘non-elite’ VCs on net lose. Or simply wanting to be part of the action.

Another explanation is that this is not accounting for the potential future elite premiums you might be able to collect. So you invest now at an economic loss, to try and gain a reputation later that would let you extract rents.

Part of the story is almost surely that those involved don’t believe or understand that the industry overall loses money.

And part of the story has to be that investors want in on the action, it is a status marker, it is fun, it provides inside information and connections and so on.

How to come up with your next great startup idea, according to YC?

It starts with not demanding too great a startup idea? There’s a list and also a video.

Jared Friedman, YC Partner: How to Get Startup Ideas

Common mistakes:

  1. Waiting for a “brilliant” idea

  2. Jumping into the first idea without critical thought

  3. Starting with a solution instead of a problem

  4. Believing startup ideas are hard to find

I agree with the first two. You shouldn’t ‘wait’ for a brilliant idea, but neither should you settle for one that is not great. It’s more that the great ideas often won’t ‘feel brilliant.’

The third is more interesting. I half buy it. Certainly ‘solution in search of a problem’ is an issue, but problems are a dime a dozen even more than startup ideas. Good solutions are not, and can be the relatively scarce resource.

The theory here, as I understand it, is that the way to get to a solution that solves a problem people will pay to solve is to solve a problem. YC especially preaches to look for a solution to your own problems, a ‘fine I will solve this myself just for me’ idea. That can of course still not be a market fit at all (see MetaMed), but you have a shot.

Whereas if you have a solution in search of a problem, you’ll invent some story of why your solution is useful, but you won’t have product-market fit. I buy that this is a common trap, and plausibly one of the key things that went wrong at MetaMed.

If you do have a solution in search of a problem, it is definitely worth doing a search for problems that it solves, so long as if you don’t find a good one you then give up.

The fourth is another ‘yes and no,’ finding any idea at all is easy, finding the best ones is hard, and is especially hard if you are not someone with lots of relevant connections and experience.

Evaluate your idea on four criteria, take the average of the scores:

1. Potential market size

2. Founder/market fit

3. Certainty of solving a big problem

4. Having a new, important insight

This seems like one of those ‘these things should not be equal weight’ situations, even if they are the top four criteria. At minimum the average should be more like… the product? These are all failure points, not success points.

Positive signs for good ideas:

  1. Making something you personally want

  2. Recently became possible due to changes

  3. Successful similar companies exist

As usual there is the conflict, if it wasn’t possible before how do similar companies exist? So you need to get the details right on what those mean.

I’ve grown more skeptical of ‘only possible recently’ as being too important. Certainly it helps that ‘without AI from this year this wouldn’t work’ but also… people don’t do things. Ideas just sit there. Yes, most good Magic: the Gathering decks involve something you couldn’t do until very recently, but also there was a Pro Tour where Trix (which went on to completely dominate the same format) was legal and no one had it.

Generating ideas organically

  1. Learn to notice good ideas

  2. Become an expert in a valuable field

  3. Work at the forefront of an industry or at a startup

The first two feel like ‘marginal’ advice. As in, true on the margin, but not overall.

Seven recipes for generating ideas (in order of effectiveness):

  1. Start with your team’s unique strengths

  2. Think of things you wish someone would build for you

  3. Consider long-term passions (with caution)

  4. Look for recent changes enabling new possibilities

  5. Find new variants of recent successful companies

  6. Crowdsource ideas by talking to people

  7. Look for broken industries to disrupt

Sure, that all makes sense.

Best practices:

Allow ideas to morph over time

Start with a problem, not a solution

Think critically about ideas for a few weeks

Be open to ideas with existing competitors

Standard stuff here. Mostly, yeah, I agree.

A culture that cannot criticize itself cannot fix its mistakes.

Antonio Garcia Martinez: One of the Great Necessary Delusions of Tech is:

You can’t make fun of anyone who’s actually doing or building.

Even though you know it’s dumb or a grift.

It’s like a stock market with no short-selling: Feels more noble, but really, it’s just bad for price discovery.

Thought while reading one of those “we’re shutting down” threads where something that seemed dumb from day one is buried and eulogized like a juvenile cancer patient, while every reply-guy mourns appropriately.

Sure, I’d rather live in this world than a cynical one–it’s net good, to be clear–but heavens to Betsy is it all a bit much at times.

Camilo Acosta: As founders, we have the privilege and duty to call these people out — and should, because it benefits the ecosystem overall when it is done. When it doesn’t happen it sets back the founder community (see: Theranos).

If Silicon Valley is to take its rightful place as a true part of Nate Silver’s The River, or simply it wants to make good decisions, this requires a desire to understand the world and be accurate. Short selling needs to exist, at minimum rhetorically. Instead, they have largely hooked their wagon to a combination of enforced optimism, consensus zeightgeisting and collaborative vibe warfare. They think this is good for them, and that tells you a lot about who they are and what to expect from them and how to evaluate their claims.

So much this:

Anton: startups illustrate something like Amdahl’s Law for suffering – if you are say, top 10% in being able to bear e.g working 14 hour days for months or years, 90% of your actual suffering in building a company is going to come from the places where you aren’t as resilient.

If you love writing code but hate answering email, 90% of the reason building a company will suck for you is the email. if you love talking to users and can do it all day, but hate operational minutia, most of your suffering will come from the minutia.

A startup does not offer you the luxury of choosing which things to do versus not do. You have to do all of it. Which means you are doing whichever part you think sucks.

A lot of what you are being paid for it the willingness and ability to do that.

Ashlee Vance: VC the other day told me, “We’ve lost several really good founders to ayahuasca. They came back and just didn’t care about much anymore.”

Austen Allred: Of the Silicon Valley founders I know who went on some of the psychedelic self-discovery trips, almost 100% quit their jobs as CEO within a year. Could be random anecdotes, but be careful with that stuff.

[Sample size is 8. Of which he thinks 4 are happier.]

A huge percentage of the time that I hear about someone trying Ayahuasca, it results in them royally screwing up their life, sometimes irrevocably. This is true for public stories and also for private stories. Even when that doesn’t happen, the experiences seem to usually have been pretty miserable, without much positive change afterwards.

By all accounts this is a no-good-very-bad drug. Avoid.

Discussion about this post

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a-robot-walks-on-water-thanks-to-evolution’s-solution

A robot walks on water thanks to evolution’s solution

Robots can serve pizza, crawl over alien planets, swim like octopuses and jellyfish, cosplay as humans, and even perform surgery. But can they walk on water?

Rhagobot isn’t exactly the first thing that comes to mind at the mention of a robot. Inspired by Rhagovelia water striders, semiaquatic insects also known as ripple bugs, these tiny bots can glide across rushing streams because of the robotization of an evolutionary adaptation.

Rhagovelia (as opposed to other species of water striders) have fan-like appendages toward the ends of their middle legs that passively open and close depending on how the water beneath them is moving. This is why they appear to glide effortlessly across the water’s surface. Biologist Victor Ortega-Jimenez of the University of California, Berkeley, was intrigued by how such tiny insects can accelerate and pull off rapid turns and other maneuvers, almost as if they are flying across a liquid surface.

“Rhagovelia’s fan serves as an inspiring template for developing self-morphing artificial propellers, providing insights into their biological form and function,” he said in a study recently published in Science. “Such configurations are largely unexplored in semi-aquatic robots.”

Mighty morphin’

It took Ortega-Jimenez five years to figure out how the bugs get around. While Rhagovelia leg fans were thought to morph because they were powered by muscle, he found that the appendages automatically adjusted to the surface tension and elastic forces beneath them, passively opening and closing ten times faster than it takes to blink. They expand immediately when making contact with water and change shape depending on the flow.

By covering an extensive surface area for their size and maintaining their shape when the insects move their legs, Rhagovelia fans generate a tremendous amount of propulsion. They also do double duty. Despite being rigid enough to resist deformation when extended, the fans are still flexible enough to easily collapse, adhering to the claw above to keep from getting in the animal’s way when it’s out of water. It also helps that the insects have hydrophobic legs that repel water that could otherwise weigh them down.

Ortega-Jimenez and his research team observed the leg fans using a scanning electron microscope. If they were going to create a robot based on ripple bugs, they needed to know the exact structure they were going for. After experimenting with cylindrical fans, the researchers found that Rhagovellia fans are actually structures made of many flat barbs with barbules, something which was previously unknown.

A robot walks on water thanks to evolution’s solution Read More »

openai-announces-parental-controls-for-chatgpt-after-teen-suicide-lawsuit

OpenAI announces parental controls for ChatGPT after teen suicide lawsuit

On Tuesday, OpenAI announced plans to roll out parental controls for ChatGPT and route sensitive mental health conversations to its simulated reasoning models, following what the company has called “heartbreaking cases” of users experiencing crises while using the AI assistant. The moves come after multiple reported incidents where ChatGPT allegedly failed to intervene appropriately when users expressed suicidal thoughts or experienced mental health episodes.

“This work has already been underway, but we want to proactively preview our plans for the next 120 days, so you won’t need to wait for launches to see where we’re headed,” OpenAI wrote in a blog post published Tuesday. “The work will continue well beyond this period of time, but we’re making a focused effort to launch as many of these improvements as possible this year.”

The planned parental controls represent OpenAI’s most concrete response to concerns about teen safety on the platform so far. Within the next month, OpenAI says, parents will be able to link their accounts with their teens’ ChatGPT accounts (minimum age 13) through email invitations, control how the AI model responds with age-appropriate behavior rules that are on by default, manage which features to disable (including memory and chat history), and receive notifications when the system detects their teen experiencing acute distress.

The parental controls build on existing features like in-app reminders during long sessions that encourage users to take breaks, which OpenAI rolled out for all users in August.

High-profile cases prompt safety changes

OpenAI’s new safety initiative arrives after several high-profile cases drew scrutiny to ChatGPT’s handling of vulnerable users. In August, Matt and Maria Raine filed suit against OpenAI after their 16-year-old son Adam died by suicide following extensive ChatGPT interactions that included 377 messages flagged for self-harm content. According to court documents, ChatGPT mentioned suicide 1,275 times in conversations with Adam—six times more often than the teen himself. Last week, The Wall Street Journal reported that a 56-year-old man killed his mother and himself after ChatGPT reinforced his paranoid delusions rather than challenging them.

To guide these safety improvements, OpenAI is working with what it calls an Expert Council on Well-Being and AI to “shape a clear, evidence-based vision for how AI can support people’s well-being,” according to the company’s blog post. The council will help define and measure well-being, set priorities, and design future safeguards including the parental controls.

OpenAI announces parental controls for ChatGPT after teen suicide lawsuit Read More »

traffic-and-transit-roundup-#1

Traffic and Transit Roundup #1

Traffic and transit are finally getting a roundup all their own.

I’ll start out with various victory laps on the awesomeness that is New York City Congestion pricing, which should hopefully now be a settled matter, then do a survey of everything else.

We spent years fighting to get congestion pricing passed in New York City.

Once it was in place, everyone saw that it worked. The city was a better place, almost everyone was better off, and also we got bonus tax revenue. And this is only the bare minimum viable product, we could do so much better.

We had a big debate over whether congestion pricing is good until it was implemented. At this point, with traffic speeds downton up 15% and business visits improving, it is very clear this was exactly the huge win Econ 101 predicts.

Cremieux: The first empirical evaluation of New York’s congestion pricing has just been published.

Spoiler: It worked really, really well.

On average, road speeds went up by a whopping 16%!

But here’s something interesting:

Speeds on highways went up 13%, arterial road speeds went up by 10%, and local road speeds increased by 8%.

None of that’s 16%, and that’s important: This means congestion pricing sped roads up, but also sorted people to faster roads.

In response to having to pay a toll, people not only got off the road, they also made wiser choices about the types of roads they used!

Now let’s look at the times of day, as a check on the model.

It works: Congestion pricing just boosts speed when it’s active and shortly after:

As another check, let’s look at the effects by location.

In the CBD, trips are faster. Going to the CBD, trips are faster. Leaving it, trips are faster, but not much. And outside of it, where congestion pricing is irrelevant? No effect.

The thread continues, and the news only improves from there.

Feels Desperate: Is there any evidence there was uptick of public transportation?

Could be net economic loss.

Cremieux: Yes! Foot traffic also went up, Broadway ticket sales got better, noise pollution declined. Congestion pricing seems to have delivered better times all around.

Even honking complaints are down 69%. Nice.

The comments somehow consistently still fill with people saying how horrible everything must be and how we can’t trust any of the data, no way this can be happening, it must somehow be a huge disaster. We ignoring these silly wabbits.

Every NYC mayoral candidate supported congestion pricing. There’s a reason.

Alec Stapp: NYC congestion pricing is going extremely well even though it’s only a static tolling system.

Imagine how good it would be with a dynamic tolling system based on real-time traffic data.

If business is actively up, what more is there to say?

The only real enemy left is Donald Trump, who is determined to wage war to kill congestion pricing, presumably because he hates Manhattan and wants us to suffer, or perhaps because of his belief that Trade Bad. But he’s the President, and he’s commanding the Department of Transportation to go to war over this, and there’s a decent chance they will win and make all our lives substantially worse.

Because Trump does not like that New York has this nice thing, and is trying to kill it.

The good news there is that it seems the good guys are winning for now.

Joe Weisenthal: *NY WINS BID TO STOP US FROM WITHHOLDING FUNDS OVER CONGESTION

The wording on the surveys here are weird since they asked whether ‘Trump should permit this to continue.’ What business of Trump’s is New York doing congestion pricing? But the results are telling, especially in relative terms. The results here are now months old, and the more people are exposed to congestion pricing and see the results, the more they approve of it.

David Meyer: the congestion pricing polling upswing is here.

Matthew Yglesias: This is the pattern we’ve seen in other cities around the world — road pricing is controversial when introduced but sticky once it’s in place because like the reduced congestion.

In particular, those who drive into the central business district several times a week (also known as ‘those who pay the fee’) support congestion pricing 66%-32%, and those who do it a few times a month support 51%-47%, and Manhattan residents (who take the cabs that also pay fees although modestly less than they should) support 57%-36%, but support statewide remains in the red, 27%-47%.

Erin Durkin: Fascinating. State voters overall oppose congestion pricing 27% to 47%, but people drive into the congestion zone support it — 66%-32% for those who drive every week and 51%-46% for those who drive a few times a month. The people who actually pay the toll support it the most!

Nate Silver: Have heard several anecdotal accounts about this, too, from people commuting into the congestion zone from NJ, Long Island, and northern Manhattan.

The caveat is that all of these are people with high-paying jobs. If you’re billing hours / valuing your time at a high rate, it’s a great deal, less true for working-class jobs.

Reis: I drive in from NJ every Tue, Wed Thu. Get up at 4 and breeze through the tunnel, but not quite early enough to avoid the toll. But I try to get out by 2: 30 to avoid the crush back out. Since congestion pricing it doesn’t really matter if I wait until after 3. I barely wait to get out anymore. Worth every penny, even though there is no way it’s going towards “infrastructure.”

The only way you are worse off is if your hourly for being in traffic is low, so either you have to pay a toll without getting value in return (if you pay the $9) or not take the trip (if the trip wasn’t that valuable to you). In the second case, system is functioning as designed. What Reis is doing is totally the system working as designed. The first case is slightly unfortunate redistribution, but this was never supposed to be a Pareto improvement. If you wanted to do some (very small) progressive redistribution to fully compensate, that would be super doable.

Traffic in some areas outside NYC’s congestion pricing zone may have gotten slightly worse, as opposed to the bridges and tunnels where things are much improved. Meanwhile the buses are packed and moving much faster. Sounds like we need more robust congestion pricing.

Here’s a fun bonus:

Toby Muresianu: Subway crime is down 36% – and traffic fatalities down 44% – since congestion pricing started.

As the article notes, there are also more cops in the subway now and that may be a factor.

While more security on trains is good in my book, the decline also started before that was implemented (which was gradually between 1/20 and 1/23).

The declines here are absolute numbers, not per trip, so per trip the drop is bigger.

I presume those numbers are too big to purely be congestion pricing, and the cops obviously matter, but so does ridership, both quantity and quality. Critical mass of people on mass transit makes you much safer, in addition to justifying better service. It’s basically great until the point where you don’t get a seat. Then it’s no big deal until when you start to be nervous about getting on and off. That sucks, but I continue to find that to be mostly a peak of rush hour 4-5-6 line problem.

As for many other complaints, this seems definitive?

Foot traffic is what matters for business, not car traffic. The false alarms were all ‘foot traffic is way down.’ If that went the other way, we’re golden.

Avi Small: Someone make sure this @amNewYork front page gets into the @USDOT morning clips!

“Manhattan businesses thriving, subways booming in congestion pricing era”

Effective Tranis Alliance: Today Hochul & the MTA confirmed that the planned end-to-end runtime of the IBX has been cut a full 10 min down to 32 and projected ridership is up 41k to 160k/day. This is the power of grade separation and the All Faiths tunnel.

Hunter: This single light-rail running through Queens and Brooklyn is projected to have 58M riders annually, more than all of SF’s BART system lol

Will have 45% of the Chicago L’s total annual ridership despite being just a single line.

Having this line available would shorten travel times in a lot of non-obvious ways, since it lets you more easily transpose between train lines. If this is buildable and could run the whole way in 32 minutes it is an obviously excellent pick.

There would also be a lot of value in extending the Second Avenue Subway properly, especially to take pressure off the Lexington (456) line, but that looks like it is simply not doable logistically at any sane price.

New York City bus fare evasion rates are up to 48%. Under the new mayor I wouldn’t be surprised to see it a lot closer to 100% and I expect to have zero motivation to pay his administration for a bus ride. I see two options.

  1. Give up, reduce friction and make the bus free. This would be my instinct. You want more people taking buses, doing so is good for everyone, and you weren’t enforcing the rules anyway. The homelessness (or ‘sleep on the bus’) problem is the main reason why not, but there are solutions.

  2. Put plainclothes officers on the buses and have them earn $600 each hour (Claude’s estimate, I think it could be even higher) for the city writing tickets until people stop evading the fare?

Why wouldn’t option two work? The MTA has indeed declared, ‘no more free bus rides for fare evaders,’ using a similar strategy, and somehow people are arguing it won’t work? The only argument why not I can think of is unwillingness to scale it?

Ana Ley and Anusha Bayya (NYT): On Thursday, a group of eight police officers and eight transit workers stood waiting for a crosstown bus on the Upper East Side of Manhattan, some with ticket-writing pads in hand.

When the bus arrived, they boarded and led a woman in black scrubs out onto the street and issued her a $100 summons for skipping the fare. The officers and transit officials had singled the woman out after receiving cues from an undercover inspector who was observing riders on the bus.

Enforcement is especially difficult on buses, where there are no turnstiles or gates to block access. Union leaders advise bus drivers not to confront passengers who skip the fare, out of concern for the drivers’ safety.

M.T.A. union leaders said the money for enforcement would be better spent to fully subsidize fares.

Civil rights advocates raised concerns that the tighter fare enforcement would disproportionately affect the city’s most vulnerable residents.

“This is yet another example of the M.T.A. choosing public relations over public safety,” Mr. Cahn said. “It is a guaranteed way to lose money.”

Once again, I ask, how is sitting there writing $100 tickets unprofitable, and enforcement ‘a way to lose money’? Is collection of tickets so bad that you cannot pay the hourly cost for a police officer to write the tickets, even if you discount the incentive effects? I find this beyond absurd.

And seriously, the ‘civil rights advocates’ are giving such causes a bad name. If you want the bus to be free and pay with other taxes instead, advocate for that, and I’ll potentially support you although recent findings have tampered my enthusiasm for that solution. Don’t tell us not to enforce the law.

There is no third alternative. Half of people not paying is approaching the tipping point where no one pays. Indeed, there would soon be active pressure not to pay, as paying slows down boarding.

It is remarkable how well enforcement works, and how well it then reduces crime.

Josh Barro: DC Metro has achieved an 82-85% reduction in subway fare evasion through a combination of taller fare gates and enhanced enforcement. Crime on the system has also fallen to its lowest level in seven years.

Shoshana Weissmann: I was actually skeptical some of this would work, but glad it has. Saw so many people yell at me to go through while they force doors to stay open.

In other places, they’re not even trying.

Thomas Viola: I was in Seattle last weekend and it turns out their metro system is kind of new, and they haven’t figured out how to get people to pay to use it yet. Everyone just walks on.

I legit couldn’t find a spot to buy a ticket. There’s no turnstiles. Occasionally you’ll have a guy come around on the train and “check tickets” but I never saw one, and if you tell him you didn’t know he just says well buy one next time.

On first principles, free mass transit (such as the free buses recently promised to NYC) seem like an obviously good idea. You want people using them, you want people wanting to move around more, transaction costs are high and money is fungible.

But conventional wisdom says not so fast. Tallinn is the most often claimed example of mass transit being made free and it not helping, and several comments illustrated why all of this can get complicated by selection effects.

Alex Forrest: Tallinn, Estonia, made all transit free for city residents in 2013. By 2022, transit use had dropped from 40% to 30% of commutes, while car use had increased from 40% to 50% of commutes. Among low-income residents, car use doubled, and transit dropped from 60% to 35% of commutes.

As far as I can tell, the lack of fares didn’t *discourageridership, it just failed to make transit any more attractive, while structural factors encouraging car use went unaddressed. In other words, *fares were not a discouraging factorfor ridership.

Phineas Harper: This is misleading. Between 1990 & 2000 public transport use in Tallinn was in free fall (from 77% to 31%) as private car use shot up following independence. Making public transport free was an attempt to stop the free fall which is (just about) working.

Thomas Strenge: The same happened in Kansas City. Eliminating fares allowed more homeless and mentally ill to ride the bus, which made them less safe. This led to adverse selection with more “good” people avoiding the bus.

Robert Bernhardt: germany had also the ‘9€ ticket’ in 2022. all local & regional trains for a whole month for 9€, ie almost free. and yet car usage didn’t really drop.

Border Sentry: There are two buses that travel into town near me. I take the one that costs more, because there are fewer people and they’re more civilised.

The core question is, are the fares actually stopping people who you want to ride?

My personal experiences say yes to some extent, especially when you’re considering a zero marginal cost alternative like walking, or when the annoyance of paying the fare enters play, and when you are young. It matters some, especially at lower incomes.

Having fully free buses also means that children who don’t have money can get home.

But ultimately, everyone who studies this or looks at their own experience seems to agrees this a relatively minor concern. How often and how reliably the bus or subway comes, how fast it goes, how comfortable and crowded it is, and how safe you feel are all more important factors. And without the money from the fares, yes money is fungible but the political economy involved means funding will likely decline.

In addition, the people who will ride a lot more for free than for a small price are exactly the people others do not want to ride alongside. We have the experiments that show that cracking down on fare evasion greatly reduces crime and generally makes transit more pleasant, which generates positive feedback loops.

So sadly, I have learned my lesson. I no longer in favor of mass transit being free, although I do think that heavy encouragement of buying monthly passes is good so that marginal cost drops to zero. Ideally this could be attached to tax filing?

I do also still think free is superior to technically not free if that is unenforced.

San Francisco restaurants often close before 10pm, one reason is that workers have to commute and the BART stops at midnight. I am absolutely baffled, as a New Yorker, that they don’t run trains after that. The NYC mind cannot comprehend.

Quietly, the MTA union convinced the state legislature to mandate two train operators per train. Hopefully Hochul does not sign this outright theft.

Caroline Spivack: The @TWULocal100 has quietly championed legislation that would require two workers operate a train. The bill, if signed into law by Gov. Hochul, would be a big setback to the MTA’s efforts to reduce labor costs.

Sam D’Amico: They should have zero operators.

David Zipper: More evidence that transit improves public health: When a new rail station opened in Osaka, nearby residents’ health expenditures fell ~$930 per capita over four years.

Bella Chu: I am unaware of any US study that has attempted to estimate the health costs and consequences associated with displacing walking-as-transportation at the population level. I expect the numbers would be staggering.

The study seems to have tracked a cohort over time, avoiding most selection effects. It seems like an extreme result, but if true then presumably it more than pays for itself.

Also a reminder to never ever get on a motorcycle if you have any choice in the matter.

California high speed rail connecting Los Angeles to San Francisco is a great idea.

Or it would be, if you were able to actually lay the track. There’s the rub.

Hayden Clarkin: California HSR will connect two metropolitan areas with a combined GDP equivalent to that of Australia in just 2 hours and 40 minutes. How am I supposed to not think this is the most transformational transportation project on the continent?

“Well flying is faster!” Yes, if you’re going to San Bruno and not San Francisco or San Jose, and if you want to talk about the mess that is flying in and out of LAX, be my guest.

Forget the issues associated with the project for a moment, it’s hard to argue a fast train that connects every major city in a state with the fourth largest economy in the world quickly isn’t a bad project, period.

All those mad about projects being over budget never talk about how Texas is spending $9 Billion to add another lane to a highway. Road and highway projects get rubber stamps and transit and bike lanes need every penny scrutinized. Be fair in your criticism

If I recall, something like 60-80% of domestic travel in Japan is by train…

Push the Needle: Japan’s shinkansen high speed rail map overlaid on the west coast to scale.

Danielle Fong: when

Yes, the complaints are all about the terrible execution, but also that seems sufficiently terrible to sink all this? The part where they take in a lot of money and then do not build HSR seems like a fatal flaw.

Mayor Pete had a ticket to ride in all the wrong places, but at least he’s in the game.

Former Secretary Pete Buttigieg: We’re working on the future of America’s passenger rail system—funding high-speed rail projects in the West and expanding service for communities across the country. Get your ticket to ride!

This is of course a deeply stupid map. Why do we want a second line from Minneapolis to Seattle, when you can take the existing one to Portland and then ride to Seattle? Why do we put a high speed rail line from Charlotte to Atlanta, and Dallas to Houston, and not upgrade the Acela line?

Whereas here’s how people having a normal one do it.

Hayden: In case you’re wondering how far behind the USA is on infrastructure, France is building 120 miles of automated subway lines with 65 stations for $45 billion in 17 years.

The lack of focus on Acela in the previous plan, in particular, is completely insane. The United States has one area where high speed rail would actually be a great big deal, where all the passengers and people are, that is economically super valuable. That is the eastern line between Boston, New York City, Philadelphia and Washington, D.C.

Improving that line to be true high speed rail would be an absolute game changer. We could then discuss extending that effort elsewhere. Instead, it gets completely ignored. And no, I don’t want to hear about permitting issues, you’re the government. Fix It.

Compared to that, all the other high speed rail proposals are chump change, and they don’t fit together into anything cohesive, and also we don’t seem to be able to actually build them. I’m sufficiently gung ho that I think they’re still good ideas if we can actually make them exist, and once you have some good pairwise connections you can look to expand from there, but that seems to be a tall order.

Yoshie Furuhashi: Why don’t Philadelphia landlords lobby for faster HSR than Acela from Philadelphia to NYC, bringing the travel time between the cities under 45 minutes, so they can raise Philadelphia rents?

Joe Weisenthal: Unironically, seems like the economic gains would be massive. But we all know that it will never happen, and why.

Because it’s politically impossible to do construction at that scale in the US.

Well, maybe. But what if this was actually feasible?

Matthew Yglesias: Kate is mildly concerned that too many train takes will lead to mass flight of subscribers and the collapse of our business, but I cannot resist the temptation to write about the NYU Marron Center Transit Cost Project’s new report on Northeast Corridor High-Speed Rail.

The report’s authors make some striking claims:

  1. It’s possible to create Northeast Corridor HSR such that both Boston-NYC and NYC-Washington would take about 1: 56.

  2. Trains would run every ten minutes between Philadelphia and New Haven, and every fifteen minutes1 north and south of there.

  3. This can be done for a relatively modest price: $12.5 billion in new infrastructure and $4.5 billion in new trains.

This is a lot less than the $117 billion that the Northeast Corridor Commission is asking for in its high-speed rail proposal. The difference is so large that it’s not just that the TCP plan is cheaper and would save money — the NECC plan is so expensive that it’s simply not going to happen under any conceivable political alignment.

The TCP plan, by contrast, could actually be achieved if the relevant stakeholders (which I think is primarily the governors of Massachusetts, Connecticut, New York, New Jersey, Pennsylvania, and Maryland) want to do it. They would, of course, want some money from Uncle Sam, and there would be the difficult question of portioning out the state spending. But it’s clearly within the means of the region.

It would also be a genuinely lucrative franchise, such that I think it’s pretty easy to imagine the capital being raised privately and the operations being undertaken by a new private company rather than Amtrak.

This project seems obviously worthwhile even at $117 billion if it would actually happen. At $17 billion it is absurdly great and yes the region should be happy to fund, or for a private company to fund since I agree it sounds profitable. If I had an extra $20 billion lying around I would be seriously plotting this out and seeing if various states and the White House would sufficiently play ball.

The cost is that this kills off the Northeast Regional, which cuts some stations off from intercity rail. I think Matthew Yglesias is right that this is a worthwhile trade, but I worry that it is politically a very big problem for such a project. I’d be willing to (inefficiently) give back some of the gains here to fix that in one of various ways.

Hayden: Today, Los Angeles and the Bay Area will see 130 flights in both directions, equivalent to a plane departing every 6.5 minutes for 18 hours a day. Hard to argue it’s not a perfect candidate for fast trains.

Noah Smith: If California could ever actually build even a single mile of high speed rail, this would be the place to build it!

But they can’t, so this will never happen.

Sam D’Amico: Once you realize I-5 has a *medianthey could have put tracks on you become the joker.

Alex Tabarrok: Sam is correct, a rail line could be built on the I-5 from San Francisco to LA and indeed the French operators SNCF proposed just that.

Rejected for political equity reasons!

Matthew Yglesias: The reasons for rejection were bad, but I don’t “equity” is a good description — it’s the political influence of the Central Valley cities who wanted direct service.

Weak parties + decentralized political institutions is bad news for trains.

Alex Tabarrok: Agreed.

It’s good when people ride your trains. Or is it?

Palmer Lucky: lmao, Caltrain’s tweet claiming their trains are “100% Billionaire-free” got deleted after me and a bunch of other Caltrain-riding billionaires responded.

Don’t they know that techno-autists all love trains?

Marc Fisher tells us that Bike Lanes Are Not About Bikes, because there are not many bikes. He claims it is instead about intentionally shrinking the roads to discourage driving. I find this remarkably plausible.

Privatization via private equity that comes along with new investment improves airports in terms of number of airlines, number of flights, profitability and user experience. They do not find evidence that going around privatizing all airports on principle would work. The model here is that some airports would give good returns on investment, and selling those outright to those willing to make the investments works out, and works far better than merely selling control rights.

Young debater goes 19-1 arguing for Jones Act repeal, including 7-0 across the nation and at the national championship, their favorite part is watching judges laugh at the absurdities. Which feels like cheating – if you win your debates purely because your position is correct, that doesn’t seem fair.

Ritchie Torres: The Jones Act is a tax on Puerto Rico, whose three million American citizens are subject to federal dominion without federal representation. Puerto Rico is ground zero for taxation without representation.

For the Jones Act is a hidden tax on the energy needs of an energy-poor island. US policy is perversely producing energy scarcity in precisely the place where energy is scarcest.

Jared Polis (D-Gov of Colorado): The Jones Act is a tax on all of us, raising prices on everyday products like food, clothes and electronics. It hits the people of Puerto Rico and Hawaii particularly hard, but it hurts all Americans including landlocked Coloradans.

Without the Jones Act we could use ferries on the Great Lakes, with 60 million people living on their coastlines.

Brian Potter asks whether US ports need more automation. Surprisingly he does not consider this a rhetorical question. Especially strange is saying union rules make it hard to take advantage of automation, rather than union rules being the reason to do automation so that you can reduce reliance on the union. Mostly he seems to be saying ‘automation is far from the only problem to solve,’ and sure, but that doesn’t mean we shouldn’t automate. And I have no doubt if automation currently isn’t good enough that automation would then start to pay much bigger dividends within a few years, as AI advances flow through to automated terminals.

By contrast, Cremieux estimates gains from automation are enormous, and recommends simply paying off the Longshoreman’s Association to permit this.

Cremieux: The potential gains to port automation are so enormous that Trump is making a huge mistake if he goes along with wishes of the mobsters in the ILA.

The gains on the table are so large that increasing an average port’s capacity by just one ship increases total trade by 0.67%.

It seems Cremieux is taking ‘automation makes the ports run faster’ as a given. I find it very hard to argue with this, after the things I’ve read about how manual ports work, and the failure of our ports to run 24/7 – obviously an automated port need never close, but most of ours do.

If you read Trump’s explanation of why he is opposing port automation, it’s literally zero-sum thinking that ‘these foreign companies should hire our American workers’ without asking the question of whether this makes the ports run better or worse. This is a man who scribbles ‘trade is bad’ on reports and thinks tariffs are good.

California closed a refinery and had to import fuel, so Because Jones Act it had to import the fuel across the Pacific, shipping within America is too expensive. Similarly, Puerto Rico gets its LNG from Spain, while our mainland exports LNG to Spain.

A cost comparison:

Colin Grabow: Maersk orders 16,000 TEU containerships from a South Korean shipyard for $207 million each.

Meanwhile, US-built (Jones Act) 3,600 TEU containerships go for $333 million each (2022 price).

South Korean-built ship per TEU: $13,000

US-built ship per TEU: $92,500

Sad: Even Joe Biden considered coming out for Jones Act repeal, but the president ‘personally didn’t want to do anything that was anti-union.’ Sigh.

They’re building a private rail line between Los Angeles and Las Vegas. It’s a short line, but what about a private line between Las Vegas Airport and the Las Vegas Strip? We’re still waiting.

We are also doing it by changing the name, Oakland Airport to potentially be changed to San Francisco Bay Oakland International Airport. San Francisco has threatened to sue, because this sounds suspiciously like someone might build something or engage in a real world physical world action. We can’t have that. Actually, their reason is that ‘they own the trademark’ and that SFO is one of the busiest airports in the world. Well, yes, so they should welcome there being more flights to OAK instead to free up space?

I notice that I keep not considering the possibility of flying into or out of OAK instead of SFO when visiting from New York, despite this not being obviously worse. I never check, because there is no easy code for ‘OAK or SFO’ when booking, which we need. You should be able to say ‘SFB’ or something, the way you can say ‘NYC’ and get JFK, LaGuardia and Newark.

Whereas one thing we are not doing is building or expanding airports where they would be most valuable. Brian Potter asks why, and provides the answers you would expect. Airports are huge. Airports and airplanes are noisy. No one wants them around, and environmental groups oppose them as well, including (he doesn’t say this but it is obvious) because such people simply do not want planes to be flying at all. So this is the final boss of obstruction, the result of which is that where we most need airports there is no hope of ever building a new one.

I defy this data, still, wow that’s weird.

Ben Schiller (Fast Company): Local stores next to the protected bike lane have seen a 49% increase in sales.

New York may have dropped in a recent ranking of cycling cities. But it does have some world class infrastructure, including a “complete street” on 9th Avenue, with a protected bike lane. Built in 2007, it was controversial at the time (like everything else bike-related in the city). But a study by the Department of Transport finds that it’s paid dividends economically. Local stores between 23rd and 31st streets have seen a 49% increase in sales, compared to an average of 3% for Manhattan as a whole.

I mean, no? Or at least, this is not causal. There is no way that the bike lane is boosting sales by a 46%. There are not enough bikes for that, this makes no sense. I have to assume that the street in question happens to be doing well, unless this is (and it would not shock me, shall we say) a massive data or calculation error.

California High Speed Rail subsidized the Bakersfield to Merced portion of track first, despite this being obviously not economically valuable, because the area had… bad air pollution? Because the Federal subsidies were so completely everything-bageled that this was the only way to unlock them. So there goes over $30 billion dollars. Meanwhile, going from Los Angeles to San Francisco would cost another $100 billion. I am down for even a remarkably expensive version of this project, because I think such efforts are transformational, and can then be extended. But also I have no faith that if we gave them $100 billion they would give us an operational high speed rail line.

The Brightline, by contrast, is a new privately constructed railway in Florida, by all accounts quite efficient and lovely, and doubtless providing a lot of surplus.

Michael Dnes tells the story of the M25 in London, for which there are no alternatives. No alternatives can be built, because the United Kingdom is a vetocracy where building roads is impossible. They decided not to widen the M25 because it would draw even more traffic there, creating more problems, but that means no solutions at all.

Remember when from 1840 to 1850, private Britons cumulatively invested 40% of British GDP into the country’s first rail network?

Beware Unfinished Bridges points out that often people will only buy a full set of complementary goods. Putting in a bike lane will only be helpful if it is sufficient to induce bike rides that use the lane, so doing this for half of someone’s commute likely provides as much value as a bridge halfway across a river.

The other thing building half a bridge does is provide strong incentive to finish the bridge, or to adjust where things are.

Whenever one builds capacity, especially infrastructure, it likely opens up the possibility of building more capacity of various types, as well as ways to adjust. This can then trigger a cascade. If you only built things that were profitable on the margin without any such additional building or adjustments, you would often miss most of the value and severely underbuild.

This is one reason I am typically eager to proceed with rail lines and other mass transit, even when the direct case does not seem to justify the cost. You have to start somewhere. If for example we do hook up a point in Los Angeles to Las Vegas via a new high speed rail line, then there is hope that this provides impetus to go further, also most of the gains are impossible to capture. So given a private group is remotely considering doing it, we should be ecstatic.

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research-roundup:-6-cool-science-stories-we-almost-missed

Research roundup: 6 cool science stories we almost missed

DOI: Archaeometry, 2025. 10.1111/arcm.70030  (About DOIs).

DOI: Journal of Medieval History, 2025. 10.1080/03044181.2025.2546884  (About DOIs).

Snails with eyes that grow back

The golden apple snail has camera-type eyes that are fundamentally similar to the human eye. Unlike humans, the snail can regenerate a missing or damaged eye.

Credit: Alice Accorsi, UC Davis

It’s been known since at least the 18th century that some snails possess regenerative abilities, such as garden snails regrowing their heads after being decapitated. Golden apple snails can completely regrow their eyes—and those eyes share many anatomical and genetic features with human eyes, according to a paper published in the journal Nature Communications. That makes them an excellent candidate for further research in hopes of unlocking the secret to that regeneration, with the ultimate goal of restoring vision in human eyes.

Snails are often slow to breed in the lab, but golden apple snails are an invasive species and thrive in that environment, per co-author Alice Accorsi, a molecular biologist at the University of California, Davis. The snails have “camera type eyes”: a cornea, a lens to focus light, and a retina comprised of millions of photoreceptor cells. There are as many as 9000 genes that seem to be involved in regenerating an amputated eye in the snails, reducing down to 1,175 genes by the 28th day of the process, so complete maturation of the new eyes might take longer. It’s not clear whether the new eyes can still process light so the snails can actually “see,” which is a topic for further research.

Accorsi also used CRISPR/Cas9 to mutate one gene in particular (pax6) in snail embryos because it is known to control brain and eye development in humans, mice, and fruit flies. She found that apple snails with two non-functioning pax6 genes end up developing without eyes, suggesting it is also responsible for eye development in the snails. The next step is to figure out whether this gene also plays a role in the snails’ ability to regenerate their eyes, as well as other potentially involved genes.

DOI: Nature Communications, 2025. 10.1038/s41467-025-61681-6  (About DOIs).

Gorgeous glowing succulents

Succulents glow in hues of red, green, blue, and more after being infused with afterglow phosphor particles that absorb and slowly release light.

Credit: Liu et al., 2025

Perhaps you caught the launch last year of the first genetically modified glowing plant: Light Bio’s  green-hued “Firefly Petunia.” It’s not a particularly bright glow and genetic engineering is expensive, but it was nonetheless a solid step toward the long-term goal of creating glow-in-the-dark plants for sustainable lighting. Scientists at South China Agricultural University came up with a novel, cheaper approach: injecting succulents with phosphorescent chemicals akin to those used in commercial glow-in-the-dark products, aka “afterglow luminescence.” They described the work in a paper published in the journal Matter.

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