Author name: Tim Belzer

claude-3.7-sonnet-debuts-with-“extended-thinking”-to-tackle-complex-problems

Claude 3.7 Sonnet debuts with “extended thinking” to tackle complex problems

Would the color be called 'magenta' if the town of Magenta didn't exist? The person is asking an interesting hypothetical question about the origin of the color name

An example of Claude 3.7 Sonnet with extended thinking is asked, “Would the color be called ‘magenta’ if the town of Magenta didn’t exist?” Credit: Benj Edwards

Interestingly, xAI’s Grok 3 with “thinking” (its SR mode) enabled was the first model that definitively gave us a “no” and not an “it’s not likely” to the magenta question. Claude 3.7 Sonnet with extended thinking also impressed us with our second-ever firm “no,” then an explanation.

In another informal test, we asked 3.7 Sonnet with extended thinking to compose five original dad jokes. We’ve found in the past that our old prompt, “write 5 original dad jokes,” was not specific enough and always resulted in canned dad jokes pulled directly from training data, so we asked, “Compose 5 original dad jokes that are not found anywhere in the world.”

Compose 5 original dad jokes that are not found anywhere in the world. The user is asking me to compose 5 original dad jokes. These should be jokes that follow the typical

An example of Claude 3.7 Sonnet with extended thinking is asked, “Compose 5 original dad jokes that are not found anywhere in the world.” Credit: Benj Edwards

Claude made some attempts at crafting original jokes, although we’ll let you judge whether they are funny or not. We will likely put 3.7 Sonnet’s SR capabilities to the test more exhaustively in a future article.

Anthropic’s first agent: Claude Code

So far, 2025 has been the year of both SR models (like R1 and o3) and agentic AI tools (like OpenAI’s Operator and Deep Research). Not to be left out, Anthropic has announced its first agentic tool, Claude Code.

Claude Code operates directly from a console terminal and is an autonomous coding assistant. It allows Claude to search through codebases, read and edit files, write and run tests, commit and push code to GitHub repositories, and execute command line tools while keeping developers informed throughout the process.

Introducing Claude Code.

Anthropic also aims for Claude Code to be used as an assistant for debugging and refactoring tasks. The company claims that during internal testing, Claude Code completed tasks in a single session that would typically require 45-plus minutes of manual work.

Claude Code is currently available only as a “limited research preview,” with Anthropic stating it plans to improve the tool based on user feedback over time. Meanwhile, Claude 3.7 Sonnet is now available through the Claude website, the Claude app, Anthropic API, Amazon Bedrock, and Google Cloud’s Vertex AI.

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the-revolution-starts-now-with-andor-s2-teaser

The revolution starts now with Andor S2 teaser

Diego Luna returns as Cassian in the forthcoming second season of Andor.

The first season of Andor, the Star Wars prequel series to Rogue One and A New Hope, earned critical raves for its gritty aesthetic and multilayered narrative rife with political intrigue. While ratings were a bit sluggish, they were good enough to win the series a second season, and Disney+ just dropped the first action-packed teaser trailer.

(Spoilers for S1 below.)

As previously reported, the story begins five years before the events of Rogue One, with the Empire’s destruction of Cassian Andor’s (Diego Luna) homeworld and follows his transformation from a “revolution-averse” cynic to a major player in the nascent rebellion who is willing to sacrifice himself to save the galaxy. S1 left off with Cassian returning to Ferrix for the funeral of his adoptive mother, Maarva (Fiona Shaw), rescuing a friend from prison, and dodging an assassination attempt. A post-credits scene showed prisoners assembling the firing dish of the now-under-construction Death Star.

According to the official longline, S2 “will see the characters and their relationships intensify as the horizon of war draws near and Cassian becomes a key player in the Rebel Alliance. Everyone will be tested and, as the stakes rise, the betrayals, sacrifices and conflicting agendas will become profound. “

In addition to Luna, most of the main cast from S1 is returning: Genevieve O’Reilly as Mon Mothma, a senator of the Republic who helped found the Rebel Alliance; Adria Arjona as mechanic and black market dealer Bix Caleen; James McArdle as Caleen’s boyfriend, Timm Karlo; Kyle Soller as Syril Karn, deputy inspector for the Preox-Morlana Authority; Stellan Skarsgård as Luthen Rael, an antiques dealer who is secretly part of the Rebel Alliance; Denise Gough as Dedra Meero, supervisor for the Imperial Security Bureau; Faye Marsay as Vel Sartha, a Rebel leader on the planet Aldhani; Varada Sethu as Cinta Kaz, another Aldhani Rebel; Elizabeth Dulau as Luthen’s assistant Kleya; and Muhannad Bhaier as Wilmon, who runs the Repaak Salyard.

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this-ev-could-reboot-medium-duty-trucking-by-not-reinventing-the-wheel

This EV could reboot medium-duty trucking by not reinventing the wheel


Modest goals and keeping within the lines have done this startup well.

A rolling medium-duty truck chassis in a factory

Harbinger’s rolling chassis, at the company’s factory in Garden Grove, California. Credit: Tim Stevens

Harbinger’s rolling chassis, at the company’s factory in Garden Grove, California. Credit: Tim Stevens

GARDEN GROVE, Calif.—There’s no shortage of companies looking to reinvent the delivery experience using everything from sidewalk drones to electric vans. Some are succeeding, but many more have failed by trying to radically rethink the simple, age-old task of getting stuff from one place to another.

Harbinger likewise wants to shake up part of that industry but in a decidedly understated way. If you found yourself stuck in traffic behind one of the company’s all-electric vehicles, there’s a good chance you wouldn’t even notice. The only difference? The lack of diesel smoke and clatter.

From the outside, Harbinger’s pre-production machine looks identical to the standard flat-sided, vinyl-wrapped delivery vehicles that seemingly haven’t changed in decades. That’s because they really haven’t. Those familiar UPS and FedEx machines are built on common chassis like Ford’s F-59 or Freightliner’s MT45, with ladder chassis and leaf spring designs dating back to the earliest days of trucking.

Rather than discarding decades of learning and optimization, Harbinger is keeping its focus narrow, changing only what’s required to move the industry away from expensive and ugly combustion to cleaner and cheaper electric drive.

Harbinger is exclusively focused on medium-duty options right now, trucks that are significantly larger than the Rivians or Mercedes eSprinters of the world. “That’s basically everything 5 through 15 tons or thereabouts,” co-founder and Harbinger CTO Phillip Weicker said, “the dominant product for what’s called a strip chassis, essentially what in the passenger market is called a skateboard.”

Yes, Harbinger just builds the chassis. Everything on top comes from somewhere else.

“Most medium-duty vehicles are built by one company building the chassis [and] another company installing the body,” Weicker said. “So this made the perfect sense for our first product because we’re going to be focused almost entirely on the differentiated aspects. We don’t have to deal with the high capital investments for body in white, paint shop, [and] a lot of the things that have cost EV startups lots of money just to get to a table-stakes position with their incoming competitors.”

If you’re a company that wants a medium-duty vehicle like this, your dealer sources the chassis for you and then coordinates sending it to a company called an upfitter. The upfitter then builds the entire body on top of the chassis to your exact specifications.

Designs from upfitters have been defined and refined over decades of experience by the companies that operate them. Those giant white or brown delivery vans might look very similar from the outside, but there’s a lot of nuance to their design.

“The door handles work slightly differently. The locking logic works differently. The vehicles are about 2 inches narrower for one of those companies than the other,” Harbinger co-founder and CEO John Harris said. “These are all designed to get the driver in and out of the door one second faster at every stop, to get in and out of the depot and load the vehicle two or three minutes faster.”

A man drives a delivery van

Harbinger CTO Phillip Weicker demoing the delivery van. Credit: Tim Stevens

Harbinger’s solution fits the same template but operates in a very different way. It’s still a big, long ladder-frame, and it uses a leaf-spring rear suspension. But rather than slapping a big engine up front, Harbinger relies on a 330-kW (443 hp) electric motor that’s wound in-house and mounted between the rear wheels. It uses a De Dion arrangement, which isolates the heavy motor from the rear suspension.

The idea was to keep the whole thing simple and familiar so that any company that wanted to get off diesel could start ordering vehicles with a Harbinger chassis without radically changing its fleet management or driver training.

I got a chance to see just how familiar the two things are during my visit to Harbinger’s 5,000-square-foot headquarters in Garden Grove, California. I wish I could say driving the Harbinger was an evocative, world-changing experience, but the company’s ethos of not reinventing the wheel very much continues through to the experience of sitting behind the wheel that steers the thing.

I started by taking a lap of the Harbinger parking lot in a Ford F-59-based machine, a former delivery truck that had already lived a hard life before it was put out to pasture, becoming something of a test mule for Harbinger. I’d never driven anything exactly like this before, but I have spent many hours droning down the highway in various abused U-Haul trucks, and the experience is much the same.

The same, but louder. Yes, the 6.7-liter diesel certainly makes a lot of noise, but the creaking and crashing of the boxy body built on top of that aged ladder-frame chassis is deafening. The automatic transmission has a leisurely approach to its job, delivering the next gear only when absolutely needed. The throttle delivers the kind of precision response that had me slamming my foot to the floor just to get around the parking lot. Doing so made a lot more noise but not much more acceleration.

That part, at least, is radically different in the Harbinger. While the throttle pedal has the same long throw, you needn’t dip nearly so far into it. A light pedal brush had the empty Harbinger delivery truck leaping forward. It’s hardly a Lucid Air Sapphire, but it still surged forward with the sort of instant acceleration that makes EVs so addictive.

Braking, too, is far more sharp. I lurched against the racy orange seatbelt the first time I stepped on the left pedal, and the combination of regenerative braking and fresh disc brakes made for a far more effective slowing solution.

There’s no transmission to worry about here, either. Instead of slinging a giant column shifter downward, in the Harbinger, you just hit the D button and pull away.

Harbinger truck interior

It’s not the most stylish cabin we’ve sat in. Credit: Tim Stevens

In motion, though, the experience is much the same. You’re seated up high, deafened by the clatter and bangs from the empty, boxy body, which, again, is exactly like that built on a traditional truck. The feedback is so harsh that it’s actually difficult to separate the overall ride quality of the truck. Still, even unladen, and thus at its harshest, it’s a far smoother drive than the Ford.

It’s easier to turn, too. The Harbinger offers 50 degrees of steering angle at the front. I pulled off my first U-turn on a narrow, suburban LA street quickly enough to not get honked at by even a single impatient Angelino.

It ultimately wasn’t the plush, hushed experience offered by your average electric sedan, but that’s not the point. By keeping everything familiar, Harbinger CEO John Harris told me Harbinger can offer a product with price parity to those aged, diesel-powered machines. Harris declined to provide formal pricing, but its affordability is at least partially dependent on federal incentives.

Currently, alternatively fueled medium-duty vehicles like Harbinger’s are eligible for the Commercial Clean Vehicle Credit 45W, which provides incentives of up to $40,000, depending on vehicle size and propulsion type.

A shelf of battery cell assemblies

Battery modules. Credit: Tim Stevens

“Where we’re pricing the vehicles, we need that 45 W if we want to undercut diesel, and that’s what we’re doing,” Harris said. “With 45 W, we can undercut the typical diesel vehicle by a few thousand dollars.”

But even if that credit goes away under the current administration, Harbinger has some price flexibility to remain competitive, he added.

That’s doubly true if you factor in operating costs. Harris says the average cost to operate a medium-duty vehicle like this is $0.50 per mile for fuel, or $0.85 if you factor in all costs relating to the vehicle itself. Harbinger is aiming to halve that, targeting $0.40 per mile. But, Harris says, Harbinger doesn’t need to lean on that total cost of ownership (TCO) logic.

“On a TCO basis, it’s easy: We blow diesel trucks away. But the whole point is to have the right acquisition cost from day one, and then the simpler operating costs deliver savings every day,” he said.

A cast EV battery case

The cast battery pack enclosure. Credit: Tim Stevens

Still, that’s potentially a huge savings when you consider the hundreds of thousands of miles a machine will cover over its lifespan, which is expected to be measured in decades, not years. Many of the medium-duty delivery vehicles you see on the road today date from the last century. Harbinger’s chassis has been designed to last just as long, including its custom-made, gigacast battery packs, which were designed for durability.

“If you took the battery pack out of a Tesla Model 3, and you put it in a commercial truck, and you tried to operate it in that environment, even if the cells lasted, I think the rest of the battery system would kind of shake itself to pieces,” Weicker said.

Harbinger customers can specify their desired pack size, and there’s even a hybrid model with an onboard generator for extended running. Harris, Harbinger’s CEO, declined to say when the company’s chassis will be in full production other than “very soon.” The company has 4,000 preorders on the books, and it has already delivered pre-production models to customers like Thor.

It’s a modest start for the company, which today counts 330 employees, but in an age of EV startups promising the moon and delivering little more than hype, the Harbinger’s focus on the basics is refreshing—and encouraging.

This EV could reboot medium-duty trucking by not reinventing the wheel Read More »

google’s-cheaper-youtube-premium-lite-subscription-will-drop-music

Google’s cheaper YouTube Premium Lite subscription will drop Music

YouTube dominates online video, but it’s absolutely crammed full of ads these days. A YouTube Premium subscription takes care of that, but ad blockers do exist. Google seems to have gotten the message—a cheaper streaming subscription is on the way that drops YouTube Music from the plan. You may have to give up more than music to get the cheaper rate, though.

Google started testing cheaper YouTube subscriptions in a few international markets, including Germany and Australia, over the past year. Those users have been offered the option of subscribing to the YouTube Premium plan, which runs $13.99 in the US, or a new plan that costs about half as much. For example, in Australia, the options are AU$23 for YouTube Premium or AU$12 for “YouTube Premium Lite.”

The Lite plan drops YouTube Music but keeps ad-free YouTube, which is all most people want anyway. Based on the early tests, these plans will probably drop a few other features that you’d miss, including background playback and offline downloads. However, this plan could cost as little as $7–$8 in the US.

Perhaps at this point, you think you’ve outsmarted Google—you can just watch ad-free music videos with the Lite plan, right? Wrong. Users who have tried the Lite plan in other markets report that it doesn’t actually remove all the ads on the site. You may still see banner ads around videos, as well as pre-roll ads before music videos specifically. If you want access to Google’s substantial music catalog without ads, you’ll still need to pay for the full plan.

Bloomberg reports that YouTube Premium Lite is on the verge of launching in the US, Australia, Germany, and Thailand.

“As part of our commitment to provide our users with more choice and flexibility, we’ve been testing a new YouTube Premium offering with most videos ad-free in several of our markets,” Google said in a statement. “We’re hoping to expand this offering to even more users in the future with our partners’ support.”

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robot-with-1,000-muscles-twitches-like-human-while-dangling-from-ceiling

Robot with 1,000 muscles twitches like human while dangling from ceiling

Plans for 279 robots to start

While the Protoclone is a twitching, dangling robotic prototype right now, there’s a lot of tech packed into its body. Protoclone’s sensory system includes four depth cameras in its skull for vision, 70 inertial sensors to track joint positions, and 320 pressure sensors that provide force feedback. This system lets the robot react to visual input and learn by watching humans perform tasks.

As you can probably tell by the video, the current Protoclone prototype is still in an early developmental stage, requiring ceiling suspension for stability. Clone Robotics previously demonstrated components of this technology in 2022 with the release of its robotic hand, which used the same Myofiber muscle system.

Artificial Muscles Robotic Arm Full Range of Motion + Static Strength Test (V11).

A few months ago, Clone Robotics also showed off a robotic torso powered by the same technology.

Torso 2 by Clone with Actuated Abdomen.

Other companies’ robots typically use other types of actuators, such as solenoids and electric motors. Clone’s pressure-based muscle system is an interesting approach, though getting Protoclone to stand and balance without the need for suspension or umbilicals may still prove a challenge.

Clone Robotics plans to start its production with 279 units called Clone Alpha, with plans to open preorders later in 2025. The company has not announced pricing for these initial units, but given the engineering challenges still ahead, a functional release any time soon seems optimistic.

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isp-sued-by-record-labels-agrees-to-identify-100-users-accused-of-piracy

ISP sued by record labels agrees to identify 100 users accused of piracy

Cable company Altice agreed to give Warner and other record labels the names and contact information of 100 broadband subscribers who were accused of pirating songs.

The subscribers “were the subject of RIAA or third party copyright notices,” said a court order that approved the agreement between Altice and the plaintiff record companies. Altice is notifying each subscriber “of Altice’s intent to disclose their name and contact information to Plaintiffs pursuant to this Order,” and telling the notified subscribers that they have 30 days to seek relief from the court.

If subscribers do not object within a month, Altice must disclose the subscribers’ names, phone numbers, addresses, and email addresses. The judge’s order was issued on February 12 and reported yesterday by TorrentFreak.

The names and contact information will be classified as “highly confidential—attorneys’ eyes only.” A separate order issued in April 2024 said that documents produced in discovery “shall be used by the Parties only in the litigation of this Action and shall not be used for any other purpose.”

Altice, which operates the Optimum brand, was sued in December 2023 in US District Court for the Eastern District of Texas. The music publishers’ complaint alleges that Altice “knowingly contributed to, and reaped substantial profits from, massive copyright infringement committed by thousands of its subscribers.”

The lawsuit said plaintiffs sent over 70,000 infringement notices to Altice from February 2020 through November 2023. At least a few subscribers were allegedly hit with hundreds of notices. The lawsuit gave three examples of IP addresses that were cited in 502, 781, and 926 infringement notices, respectively.

Altice failed to terminate repeat infringers whose IP addresses were flagged in these copyright notices, the lawsuit said. “Those notices advised Altice of its subscribers’ blatant and systematic use of Altice’s Internet service to illegally download, copy, and distribute Plaintiffs’ copyrighted music through BitTorrent and other online file-sharing services. Rather than working with Plaintiffs to curb this massive infringement, Altice did nothing, choosing to prioritize its own profits over its legal obligations,” the plaintiffs alleged.

ISPs face numerous lawsuits

This is one of numerous copyright lawsuits filed against broadband providers, and it’s not the first time an ISP handed names of subscribers to the plaintiffs. We have previously written articles about film studios trying to force Reddit to identify users who admitted torrenting in discussion forums. Reddit was able to avoid providing information in one case in part because the film studios already obtained identifying details for 118 subscribers directly from Grande, the ISP they had sued.

ISP sued by record labels agrees to identify 100 users accused of piracy Read More »

“truly-a-middle-finger”:-humane-bricking-$700-ai-pins-with-limited-refunds

“Truly a middle finger”: Humane bricking $700 AI Pins with limited refunds

After launching its AI Pin in April 2024 and reportedly seeking a buyout by May 2024, Humane is shutting down. Most of the people who bought an AI Pin will not get refunds for the devices, which debuted at $700, dropped to $500, and will be bricked on February 28 at noon PT.

At that time, AI Pins, which are lapel pins with an integrated AI voice assistant, camera, speaker, and laser projector, “will no longer connect to Humane’s servers,” and “all customer data, including personal identifiable information… will be permanently deleted from Humane’s servers,” according to Humane’s FAQ page. Humane also stopped selling AI pins as of yesterday and canceled any orders that had been made but not yet fulfilled. Humane said it is discontinuing the AI Pin because it’s “moving onto new endeavors.”

Those new endeavors include selling off key assets, including the AI Pin’s CosmOS operating system and intellectual property, including over 300 patents and patent applications, to HP for $116 million, HP announced on Tuesday. HP expects the acquisition to close this month.

Notably, Humane raised $241 million to make its pin and was reportedly valued at $1 billion before launch. Last year, Humane was seeking a sale price of $750 million to $1 billion, according to Bloomberg.

But the real failure is in the company’s treatment of its customers, who will only get a refund if they “are still within the 90-day return window from their original shipment date,” Humane’s FAQ page says. “All device shipments prior to November 15th, 2024, are not eligible for refunds. All refunds must be submitted by February 27th, 2025.”

AI Pins “will no longer function as a cellular device or connect to Humane’s servers. This means no calls, texts, or data usage will be possible,” according to the startup, which noted that users can’t port their phone number to another device or wireless carrier. Some offline features “like battery level” will still work, Humane said, but overall, the product will become $700 e-waste for most owners in nine days.

“Truly a middle finger”: Humane bricking $700 AI Pins with limited refunds Read More »

valve-releases-full-team-fortress-2-game-code-to-encourage-new,-free-versions

Valve releases full Team Fortress 2 game code to encourage new, free versions

Valve’s updates to its classic games evoke Hemingway’s two kinds of going bankrupt: gradually, then suddenly. Nothing is heard, little is seen, and then, one day, Half-Life 2: DeathmatchDay of Defeat, and other Source-engine-based games get a bevy of modern upgrades. Now, the entirety of Team Fortress 2 (TF2) client and server game code, a boon for modders and fixers, is also being released.

That source code allows for more ambitious projects than have been possible thus far, Valve wrote in a blog post. “Unlike the Steam Workshop or local content mods, this SDK gives mod makers the ability to change, extend, or rewrite TF2, making anything from small tweaks to complete conversions possible.” The SDK license restricts any resulting projects to “a non-commercial basis,” but they can be published on Steam’s store as their own entities.

Since it had the tools out, Valve also poked around the games based on that more open source engine and spiffed them up as well. Most games got 64-bit binary support, scalable HUD graphics, borderless window options, and the like. Many of these upgrades come from the big 25-year anniversary update made to Half-Life 2, which included “overbright lighting,” gamepad configurations, Steam networking support, and the like.

Valve releases full Team Fortress 2 game code to encourage new, free versions Read More »

microsoft-warns-that-the-powerful-xcsset-macos-malware-is-back-with-new-tricks

Microsoft warns that the powerful XCSSET macOS malware is back with new tricks

“These enhanced features add to this malware family’s previously known capabilities, like targeting digital wallets, collecting data from the Notes app, and exfiltrating system information and files,” Microsoft wrote. XCSSET contains multiple modules for collecting and exfiltrating sensitive data from infected devices.

Microsoft Defender for Endpoint on Mac now detects the new XCSSET variant, and it’s likely other malware detection engines will soon, if not already. Unfortunately, Microsoft didn’t release file hashes or other indicators of compromise that people can use to determine if they have been targeted. A Microsoft spokesperson said these indicators will be released in a future blog post.

To avoid falling prey to new variants, Microsoft said developers should inspect all Xcode projects downloaded or cloned from repositories. The sharing of these projects is routine among developers. XCSSET exploits the trust developers have by spreading through malicious projects created by the attackers.

Microsoft warns that the powerful XCSSET macOS malware is back with new tricks Read More »

3d-map-of-exoplanet-atmosphere-shows-wacky-climate

3D map of exoplanet atmosphere shows wacky climate

Last year, astronomers discovered an unusual Earth-size exoplanet they believe has a hemisphere of molten lava, with its other hemisphere tidally locked in perpetual darkness. And at about the same time, a different group discovered a rare small, cold exoplanet with a massive outer companion 100 times the mass of Jupiter.

Meet Tylos

The different layers of the atmosphere on WASP-121b.

This latest research relied on observational data collected by the European South Observatory’s (ESO) Very Large Telescope, specifically, a spectroscopic instrument called ESPRESSO that can process light collected from the four largest VLT telescope units into one signal. The target exoplanet, WASP-121b—aka Tylos—is located in the Puppis constellation about 900 light-years from Earth. One year on Tylos is equivalent to just 30 hours on Earth, thanks to the exoplanet’s close proximity to its host star. Since one side is always facing the star, it is always scorching, while the exoplanet’s other side is significantly colder.

Those extreme temperature contrasts make it challenging to figure out how energy is distributed in the atmospheric system, and mapping out the 3D structure can help, particularly with determining the vertical circulation patterns that are not easily replicated in our current crop of global circulation models, per the authors. For their analysis, they combined archival ESPRESSO data collected on November 30, 2018, with new data collected on September 23, 2023. They focused on three distinct chemical signatures to probe the deep atmosphere (iron), mid-atmosphere (sodium), and shallow atmosphere (hydrogen).

“What we found was surprising: A jet stream rotates material around the planet’s equator, while a separate flow at lower levels of the atmosphere moves gas from the hot side to the cooler side. This kind of climate has never been seen before on any planet,” said Julia Victoria Seidel of the European Southern Observatory (ESO) in Chile, as well as the Observatoire de la Côte d’Azur in France. “This planet’s atmosphere behaves in ways that challenge our understanding of how weather works—not just on Earth, but on all planets. It feels like something out of science fiction.”

Nature, 2025. DOI: 10.1038/s41586-025-08664-1

Astronomy and Astrophysics, 2025. DOI: 10.1051/0004-6361/202452405  (About DOIs).

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turning-the-moon-into-a-fuel-depot-will-take-a-lot-of-power

Turning the Moon into a fuel depot will take a lot of power


Getting oxygen from regolith takes 24 kWh per kilogram, and we’d need tonnes.

Without adjustments for relativity, clocks here and on the Moon would rapidly diverge. Credit: NASA

If humanity is ever to spread out into the Solar System, we’re going to need to find a way to put fuel into rockets somewhere other than the cozy confines of a launchpad on Earth. One option for that is in low-Earth orbit, which has the advantage of being located very close to said launch pads. But it has the considerable disadvantage of requiring a lot of energy to escape Earth’s gravity—it takes a lot of fuel to put substantially less fuel into orbit.

One alternative is to produce fuel on the Moon. We know there is hydrogen and oxygen present, and the Moon’s gravity is far easier to overcome, meaning more of what we produce there can be used to send things deeper into the Solar System. But there is a tradeoff: any fuel production infrastructure will likely need to be built on Earth and sent to the Moon.

How much infrastructure is that going to involve? A study released today by PNAS evaluates the energy costs of producing oxygen on the Moon, and finds that they’re substantial: about 24 kWh per kilogram. This doesn’t sound bad until you start considering how many kilograms we’re going to eventually need.

Free the oxygen!

The math that makes refueling from the Moon appealing is pretty simple. “As a rule of thumb,” write the authors of the new study on the topic, “rockets launched from Earth destined for [Earth-Moon Lagrange Point 1] must burn ~25 kg of propellant to transport one kg of payload, whereas rockets launched from the Moon to [Earth-Moon Lagrange Point 1] would burn only ~four kg of propellant to transport one kg of payload.” Departing from the Earth-Moon Lagrange Point for locations deeper into the Solar System also requires less energy than leaving low-Earth orbit, meaning the fuel we get there is ultimately more useful, at least from an exploration perspective.

But, of course, you need to make the fuel there in the first place. The obvious choice for that is water, which can be split to produce hydrogen and oxygen. We know there is water on the Moon, but we don’t yet know how much, and whether it’s concentrated into large deposits. Given that uncertainty, people have also looked at other materials that we know are present in abundance on the Moon’s surface.

And there’s probably nothing more abundant on that surface than regolith, the dust left over from constant tiny impacts that have, over time, eroded lunar rocks. The regolith is composed of a variety of minerals, many of which contain oxygen, typically the heavier component of rocket fuel. And a variety of people have figured out the chemistry involved in separating oxygen from these minerals on the scale needed for rocket fuel production.

But knowing the chemistry is different from knowing what sort of infrastructure is needed to get that chemistry done at a meaningful scale. To get a sense of this, the researchers decided to focus on isolating oxygen from a mineral called ilmenite, or FeTiO3. It’s not the easiest way to get oxygen—iron oxides win out there—but it’s well understood. Someone actually patented oxygen production from ilmenite back in the 1970s, and two hardware prototypes have been developed, one of which may be sent to the Moon on a future NASA mission.

The researchers propose a system that would harvest regolith, partly purify the ilmenite, then combine it with hydrogen at high temperatures, which would strip the oxygen out as water, leaving behind purified iron and titanium (both of which may be useful to have). The resulting water would then be split to feed the hydrogen back into the system, while the oxygen can be sent off for use in rockets.

(This wouldn’t solve the issue of what that oxygen will ultimately oxidize to power a rocket. But oxygen is typically the heavier component of rocket fuel combinations—typically about 80 percent of the mass—and so the bigger challenge to get to a fuel depot.)

Obviously, this process will require a lot of infrastructure, like harvesters, separators, high-temperature reaction chambers, and more. But the researchers focus on a single element: how much power will it suck down?

More power!

To get their numbers, the researchers made a few simplifying assumptions. These include assuming that it’s possible to purify ilmenite from raw regolith and that it will be present in particles small enough that about half the material present will participate in chemical reactions. They ignored both the potential to get even more oxygen from the iron and titanium oxides present, as well as the potential for contamination from problematic materials like hydrogen sulfide or hydrochloric acid.

The team found that almost all of the energy is consumed at three steps in the process: the high-temperature hydrogen reaction that produces water (55 percent), splitting the water afterwards (38 percent), and converting the resulting oxygen to its liquid form (five percent). The typical total usage, depending on factors like the concentration of ilmenite in the regolith, worked out to be about 24 kW-hr for each kilogram of liquid oxygen.

Obviously, the numbers are sensitive to how efficiently you can do things like heat the reaction mix. (It might be possible to do this heating with concentrated solar, avoiding the use of electricity for this entirely, but the authors didn’t analyze that.) But it was also sensitive to less obvious efficiencies. For example, a better separation of the ilmenite from the rest of the regolith means you’re using less energy to heat contaminants. So, while the energetic cost of that separation is small, it pays off to do it effectively.

Based on orbital observations, the researchers map out the areas where ilmenite is present at high enough concentrations for this approach to make sense. These include some of the mares on the near side of the Moon, so they’re easy to get to.

A map of the lunar surface with locations highlighted in color.

A map of the lunar surface, with areas with high ilmenite concentrations shown in blue.

Credit: Leger, et. al.

A map of the lunar surface, with areas with high ilmenite concentrations shown in blue. Credit: Leger, et. al.

On its own, 24 kWh doesn’t seem like a lot of power. The problem is that we will need a lot of kilograms. The researchers estimate that getting an empty SpaceX Starship from the lunar surface to the Earth-Moon Lagrange Point takes 80 tonnes of liquid oxygen. And a fully fueled starship can hold over 500 tonnes of liquid oxygen.

We can compare that to something like the solar array on the International Space Station, which has a capacity of about 100 kW. That means it could power the production of about four kilograms of oxygen an hour. At that rate, it’ll take a bit over 10 days to produce a tonne, and a bit more than two years to get enough oxygen to get an empty Starship to the Lagrange Point—assuming 24-7 production. Being on the near side, they will only produce for half the time, given the lunar day.

Obviously, we can build larger arrays than that, but it boosts the amount of material that needs to be sent to the Moon from Earth. It may potentially make more sense to use nuclear power. While that would likely involve more infrastructure than solar arrays, it would allow the facilities to run around the clock, thus getting more production from everything else we’ve shipped from Earth.

This paper isn’t meant to be the final word on the possibilities for lunar-based refueling; it’s simply an early attempt to put hard numbers on what ultimately might be the best way to explore our Solar System. Still, it provides some perspective on just how much effort we’ll need to make before that sort of exploration becomes possible.

PNAS, 2025. DOI: 10.1073/pnas.2306146122 (About DOIs).

Photo of John Timmer

John is Ars Technica’s science editor. He has a Bachelor of Arts in Biochemistry from Columbia University, and a Ph.D. in Molecular and Cell Biology from the University of California, Berkeley. When physically separated from his keyboard, he tends to seek out a bicycle, or a scenic location for communing with his hiking boots.

Turning the Moon into a fuel depot will take a lot of power Read More »

despite-court-orders,-climate-and-energy-programs-stalled-by-trump-freeze

Despite court orders, climate and energy programs stalled by Trump freeze


Chief of the EPA is also trying to claw back $20 billion, citing alleged wrongdoing.

President Donald Trump’s freeze on federal funding shows little sign of thawing for climate, energy and environmental justice programs.

Despite two federal court orders directing the administration to resume distributing federal grants and loans, at least $19 billion in Environmental Protection Agency funding to thousands of state and local governments and nonprofits remained on hold as of Feb. 14, said environmental and legal advocates who are tracking the issue.

EPA Administrator Lee Zeldin has vowed to seek return of an additional $20 billion the agency invested last year in the Greenhouse Gas Reduction Fund program, calling for a Department of Justice investigation into what he characterized as a “scheme… purposefully designed to obligate all of the money in a rush job with reduced oversight.”

Environmental advocates said Zeldin was unfairly smearing the Greenhouse Gas Reduction Fund, or “green bank,” program, on which EPA worked for more than a year with the Treasury Department to design a standard financial agent arrangement—the kind the government has used many times before to collect and distribute funds.

Critics believe the Trump administration, thwarted last week in its effort to get an appeals court to reinstate its sweeping government-wide freeze on federal funding, is resorting to a new tactic—labeling individual programs as nefarious or fraudulent. Although that approach has met with some success—a federal judge last week allowed the Federal Emergency Management Agency to freeze $80 million in funding from a migrant shelter program in New York—legal experts said courts will be looking for specifics and evidence, not broad assertions that programs are improper.

“They cannot challenge an entire program based on charges of fraud and waste,” said Jillian Blanchard, a vice president of the nonprofit Lawyers for Good Government. “If they had actual concerns about fraud or waste, they would need to follow clear procedures and protocols in the regulations, going grant by grant to address this, but that’s not what’s happening here. They are challenging entire programs whole cloth without evidence.

“The executive does not have the authority to change policies simply because they don’t like them,” Blanchard said at a virtual briefing for reporters on Friday. “Congress makes the law, not the president and certainly not Elon Musk,” she said, referring to the billionaire donor whom Trump has deputized to cut government spending.

Feeling the freeze

Across the country, the spending freeze has thrown into chaos the environmental, resilience and community improvement programs that Congress authorized in the Inflation Reduction Act of 2022. Among the efforts on hold: clean drinking water, air monitoring, hurricane recovery and electric school buses.

“Real people on the ground are being hurt by the stop-start situation,” said Blanchard, whose group is working with the Natural Resources Defense Council on the cases of 230 grantees in 44 states.

Grantees are in a state of confusion because they have not heard directly from EPA, she said.

Michelle Roos, executive director of the Environmental Protection Network, a coalition of former EPA employees that is also working with Lawyers for Good Government, said many grantees are not sure what is happening because the agency’s employees have been forbidden to talk to people outside of the agency.

Several grantees reached by Inside Climate News said that they were not talking to the press, or did not want to say whether or not they could access their funding.

MDC, a nonprofit in Durham, North Carolina, along with the Hispanic Federation, was supposed to receive a $3 million environmental justice community change grant for disaster recovery and resilience programs in Latino areas of eastern North Carolina.

“We were thrilled to receive federal support to do this work, but unfortunately, like many others, we have experienced an interruption in accessing this funding,” said Clarissa Goodlett, MDC’s director of communications.

Many neighborhoods, especially those that are home to low-income, Black and Latino residents, are still rebuilding from hurricanes that hit in 2016 and 2018.

During the storms, rural counties in eastern North Carolina did not provide real-time emergency alerts or evacuation orders in Spanish, according to Enlace Latino NC, a Spanish-language digital news outlet.

The MDC grant would help Latinos connect with local governments to ensure their communities are included in discussions and decisions about the impact of climate disasters.

“We are investigating and pursuing whatever options and channels are available to us to ensure we can follow through on our commitment to communities in eastern North Carolina,” Goodlett said.

Dorothy Darr, executive director of the Southwest Renewal Foundation in High Point, near Greensboro, North Carolina, said she doesn’t know if the group’s $18.4 million grant is frozen. Southwest Renewal is teaming up with eight partners to support not only environmental projects—tree planting, water testing and building an urban greenway—but also workforce training and infrastructure improvements. These include upgrades to old, leaking sewer lines and inefficient HVAC systems and a new energy-efficient “cool” roof at a Guilford County school.

The money would also pay for nine new public electric vehicle charging stations, anti-littering campaigns and other improvements in historically Black and low-income neighborhoods in the southwest part of the city.

Darr said the foundation only recently received an account number from the EPA, and she plans to try to access the funds Monday.

“The grant title”—Environmental and Climate Justice Community Change Grants—”has the words ‘environment’ and ‘justice’ in it,” Darr said. “If you’re just slashing programs based on words, then we’re a sitting duck.”

In Texas, the nonprofit group Downwiders at Risk received word in a Feb. 4 letter that it had received a $500,000 EPA environmental justice “collaborative problem-solving” grant it had applied for last year. The money was to be used to install community air monitors in neighborhoods near Dallas. But the notification didn’t provide instructions on how to access the money, and no followup ever came.

Executive Director Caleb Roberts called around his local EPA office, but no one could give answers.

“People are still unsure. Our project officer at the EPA has no idea. I’ve emailed people higher up,” Roberts said. “They have no idea if things are funded or not. They are just as in the dark as we are.”

Downwinders’ award letter said they had 21 days to pull their first block of funding. If no instructions to access the money arrive before then, Robert worries they may lose it.

The city of New Haven, Connecticut, only received word on Jan. 21—the day after Trump’s inauguration—that it and its local nonprofit partners had received a $20 million environmental justice community change grant, according to Steve Winter, who heads up the city’s Office of Climate and Sustainability. But he had never been able to access the funds; the online system originally said “unavailable for payment;” that changed on Feb. 10 to “suspended.”

The money was supposed to help fund whole-home energy efficiency retrofits in a city where one-quarter of the population lives in poverty and where energy costs have skyrocketed since the start of the Russia-Ukraine war, Winter said. Connecticut, like much of New England, relies heavily on heating oil in winter—not only the most expensive home heating fuel, but the most polluting. The grants also would have helped with asbestos and mold remediation in the homes, which are necessary before energy efficiency upgrades can be done.

Winter said the city has warned its partners that they now may need to lay off staff that they’ve hired for outreach for energy efficiency programs, and the future of a community geothermal project is at risk. Also up in the air: a local food rescue organization’s plans to increase staff and food storage capacity.

“People might say, oh this environmental justice grant is some frivolous thing, but it’s about helping people with quality affordable housing, with lowering their energy bills, alleviating hunger in the community, providing affordable transportation options,” Winter said. “These are all trying to meet basic needs that also have an environmental impact.”

A “rush job” accusation

The Trump administration’s drive to root out “diversity, equity and inclusion,” or DEI programs, throughout the government has swept up environmental justice programs at EPA, even though the two are distinct policy initiatives similar only in that they often involve people of color. After taking office two weeks ago, the first employees that Zeldin announced he was eliminating from the agency were those in DEI and environmental justice programs.

“The previous Administration used DEI and Environmental Justice to advance ideological priorities, distributing billions of dollars to organizations in the name of climate equity,” Zeldin said in a statement. “This ends now. We will be good stewards of tax dollars and do everything in our power to deliver clean air, land, and water to every American, regardless of race, religion, background, and creed.”

Last week, as thousands more employees at EPA and other federal agencies were placed on administrative leave or accepted the deferred retirement offer, Zeldin escalated his critiques on environmental justice and climate programs.

In a video first posted on X, Musk’s social media platform, on Wednesday night,

Zeldin called out $20 billion for the Greenhouse Gas Reduction Fund that he said had been “parked at an outside financial institution,” suggesting that the money was given away in a “rush job” in the waning days of the Biden administration. In fact, the money in question was awarded to eight recipients in August, well before the election. The program’s defenders say it went through a rigorous selection process that began more than a year before the awards were announced.

The $20 billion falls under two programs within the EPA’s Greenhouse Gas Reduction Fund and is intended to support nonprofits and financial institutions to serve as green banks. The eight recipients, which received between $400,000 and $7 billion, are supposed to use that money to finance projects by businesses and nonprofits around the country that would cut climate pollution. Much of the money is dedicated to low-income communities, where it is often harder for businesses to raise private financing.

The recipients have already begun using the funding to support businesses, including $250 million for an electric truck financing program beginning at the ports of Los Angeles and Long Beach, $31.8 million in financing for a solar project for the University of Arkansas System and $10.8 million for solar projects on Tribal lands in Oregon and Idaho.

Electric truck

An electric truck is delivered to the Port of Los Angeles in San Pedro, Calif. on Dec. 17, 2021.

Credit: Brittany Murray/MediaNews Group/Long Beach Press-Telegram via Getty Images

An electric truck is delivered to the Port of Los Angeles in San Pedro, Calif. on Dec. 17, 2021. Credit: Brittany Murray/MediaNews Group/Long Beach Press-Telegram via Getty Images

Unlike most of the grant recipients under the IRA, who draw down their money over time as work is completed, the green banks already received their money. Zealan Hoover, who administered IRA programs at EPA during the Biden administration, said the money was placed into bank accounts at Citibank under terms of financial agreements worked out with the Treasury Department.

Although EPA had never used such an outside financial agent before, the Treasury Department had made such agreements with outside institutions many times in the past to distribute or collect money. The system used for electronic federal tax payments, for expanding access to retirement savings and for getting money to assist businesses during the COVID-19 pandemic are just a few of the examples he cited.

“What is underway is not a good-faith effort to fight fraud,” Hoover said. “If it was, federal agencies would not be firing thousands of employees who are hired to conduct robust management and oversight of these programs.”

Zeldin said he was calling for termination of the financial agent agreement for the green bank program, and for the immediate return of the entire fund balance to the United States Treasury. He also said he was referring the issue to the EPA’s Office of the Inspector General and Congress and would “work with the U.S. Department of Justice.” In fact, EPA’s inspector general was dismissed in the early days of the Trump administration along with those at 16 other agencies. EPA’s press office said the agency currently has an acting inspector general but when asked, did not respond with that person’s name. EPA did not answer further questions on the financial agent program, referring only to Zeldin’s video post.

“The American public deserves a more transparent and accountable government than what transpired the past four years,” Zeldin said in the post. “We take our obligations under the law as seriously as it gets. I’ve directed my team to find your ‘gold bars’ and they found them. Now we will get them back inside of control of government as we pursue next steps.”

Citibank declined to comment. Each of the eight recipients of the green bank funds either declined to comment or did not reply to requests for comment.

“Hard for courts to catch up”

What happens next for the grant recipients is not entirely clear. Courts have issued temporary restraining orders to halt the funding freeze until the issue can be argued on its merits. In a five-page order issued Feb. 10, U.S. District Judge John McConnell Jr. of Rhode Island said that it was clear that the administration had in some instances continued “to improperly freeze federal funds.”

McConnell ordered the administration to “immediately end any funding pause,” but EPA and other agencies that are administering IRA climate programs, like the Department of Energy, are continuing to hold back funds.

“We’re talking about funding for families to make upgrades that help them save on their monthly energy bill, funding for people to buy energy efficient appliances and to retrofit their home so that cold air stays out in the winter and hot air stays out in the summer,” said Sen. Patty Murray, D-Wash., the vice chair of the Senate Appropriations Committee, in a briefing with reporters on Thursday. “Those programs aren’t just important to tackling the climate crisis. They are saving our families money.”

“What is painfully clear is that Trump’s illegal funding freeze is causing chaos and confusion,” Murray said.

But Murray and other Democrats, who helped shepherd the IRA to passage in 2022 with no Republican votes, now have little power to force a showdown in a Congress controlled by Republicans. And although multiple studies have shown that most of the $379 billion Congress devoted to funding the clean energy transition in that legislation has flowed to Republican districts, there has been little sign so far that GOP leaders are inclined to clash with the administration. In a few instances, Republicans have sought protection for individual programs that affect their own states.

Blanchard and other legal experts said the courts will have the final say on whether the Trump administration can continue to selectively freeze federal funds. But the decisions may not come soon enough for the programs that are relying on the money they were promised.

“The problem is, as a practical matter, it’s very hard for the courts to catch up,” said Richard Lazarus, an environmental law professor at Harvard Law School. “And the impact on these communities is immediate. The place is closed down, the services aren’t provided for these communities. So the impact can be immediate and devastating, and the practical remedy may be illusory.”

Lazarus was one of the legal scholars writing about environmental justice in the 1990s, before President Bill Clinton signed the first executive order to address communities that suffer a disproportionate burden of pollution. He said that although these communities now “have a fight on their hands,” it is not a new situation for them.

“It’s not as though the government turning against their hardship is something the EJ communities don’t know,” he said. “They don’t welcome it, but they know what this is. It’s how they’ve lived their lives for decades. They fought, and they’ll continue to fight. And that’ll be fighting in cases and lawsuits, and it’ll be fighting politically.”

This story originally appeared on Inside Climate News.

Photo of Inside Climate News

Despite court orders, climate and energy programs stalled by Trump freeze Read More »