NASA's Psyche spacecraft, located nearly 150 million miles from Earth on the way to an unexplored metal asteroid, has stopped firing its engines after detecting a problem in its propulsion system.

NASA published an update Tuesday revealing that the robotic spacecraft shut off its plasma thrusters earlier this month. The news wasn't widely shared until Wednesday, when NASA science chief Nicky Fox posted it on X .

"Engineers with NASA’s Psyche mission are working to determine what caused a recent decrease in fuel pressure in the spacecraft’s propulsion system," the agency said. The spacecraft detected the drop in pressure April 1 inside the line that feeds xenon fuel to the spacecraft's four plasma thrusters.

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Epic CEO and founder Tim Sweeney said in a Zoom call with press Wednesday night that the company is "going to do everything we can to bring Fortnite back to the iOS App Store next week." That decision comes after a federal district court found late Wednesday that Apple was in "willful violation" of a 2021 injunction designed to allow iOS developers to steer customers to alternate payment processors for in-app purchases.

That 2021 injunction wound its way through years of appellate review until January 2024, when the Supreme Court declined to hear a final attempt by Apple to overturn it. Since then, the District Court for Northern California has been holding a series of evidentiary hearings examining the internal development of Apple's so-called "compliance plan" for the injunction.

In a scathing Wednesday night order , District Court Judge Yvonne Gonzalez Rogers determined that Apple had engaged in a plan to "thwart the injunction's goals," and then engaged in an "obvious cover-up" to prevent that plan from being revealed. Apple's response to the initial injunction "strained credulity," the judge said, and reflected Apple's attempt to "[thwart] the Injunction’s goals, and continued its anticompetitive conduct solely to maintain its revenue stream."

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Color E Ink in its current state requires a whole lot of compromises, as we've found when reviewing devices like reMarkable's Paper Pro or Amazon's Kindle Colorsoft , including washed-out color, low refresh rates, and a grainy look that you don't get with regular black-and-white E Ink. But that isn't stopping device manufacturers from exploring the technology, and today, Onyx International has announced that it has a $1,900 color E Ink monitor that you can connect to your PC or Mac.

The Boox Mira Pro is a 25.3-inch monitor with a 3200×1800 resolution and a 16:9 aspect ratio, and it builds on the company's previous black-and-white Mira Pro monitors. The Verge reports that the screen uses E Ink Kaleido 3 technology, which can display up to 4,096 colors. Both image quality and refresh rate will vary based on which of the monitor's four presets you use (the site isn't specific about the exact refresh rate, but does note that "E Ink monitors' refresh speed is not as high as conventional monitors', and increased speed will result in more ghosting.")

The monitor's ports include one full-size HDMI port, a mini HDMI port, a USB-C port, and a DisplayPort. Its default stand is more than a little reminiscent of Apple's Studio Display , but it also supports VESA mounting.

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A thousand years ago, the people living in Chaco Canyon were building massive structures of intricate masonry and locations as far away as Mexico. Within a century, however, the area would be largely abandoned, with little indication that the same culture was re-established elsewhere. If the people of Chaco Canyon migrated elsewhere, it's unclear where they ended up.

Around the same time that construction expanded in Chaco Canyon, far smaller pueblos began appearing in the northern Rio Grande Valley hundreds of kilometers away. These have remained occupied to the present day in New Mexico; although their populations shrank dramatically after European contact, their relationship to the Chaco culture has remained ambiguous. Until now, that is. People from one of these communities, Picuris Pueblo, worked with ancient DNA specialists to show that they are the closest relatives of the Chaco people yet discovered, confirming aspects of the pueblo's oral traditions.

A pueblo-driven study

The list of authors of the new paper describing this genetic connection includes members of the Pueblo government, including its present governor. That's because the study was initiated by the members of the Pueblo, who worked with archeologists to get in contact with DNA specialists at the Center for GeoGenetics at the University of Copenhagen. In a press conference, members of the Pueblo said they'd been aware of the power of DNA studies via their use in criminal cases and ancestry services. The leaders of Picuris Pueblo felt that it could help them understand their origin and the nature of some of their oral history, which linked them to the wider Pueblo-building peoples.

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Getting the hang of through-hole soldering is tricky for those of us tinkering at home with our irons, spools, flux, and, sometimes, braids. It's almost reassuring, then, to learn that through-hole soldering was also a pain for a firm that has made more than 60 million products with it.

Raspberry Pi boards have a combination of surface-mount devices (SMDs) and through-hole bits. SMDs allow for far more tiny chips, resistors, and other bits to be attached to boards by their tiny pins, flat contacts, solder balls, or other connections. For those things that are bigger, or subject to rough forces like clumsy human hands, through-hole soldering is still required, with leads poked through a connective hole and solder applied to connect and join them securely.

The Raspberry Pi board has a 40-pin GPIO header on it that needs through-hole soldering, along with bits like the ethernet and USB ports. These require robust solder joints, which can't be done the same way as with SMT (surface-mount technology) tools. "In the early days of Raspberry Pi, these parts were inserted by hand, and later by robotic placement," writes Roger Thornton, director of applications for Raspberry Pi, in a blog post . The boards then had to go through a follow-up wave soldering step.

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It's a regrettable reality that there is never time to cover all the interesting scientific stories we come across each month. In the past, we've featured year-end roundups of cool science stories we (almost) missed. This year, we're experimenting with a monthly collection. April's list includes new research on tattooed tardigrades, the first live image of a colossal baby squid, the digital unfolding of a recently discovered Merlin manuscript, and an ancient Roman gladiator whose skeleton shows signs of being gnawed by a lion.

Gladiator vs lion?

Popular depictions of Roman gladiators in combat invariably include battling not just human adversaries but wild animals. We know from surviving texts, imagery, and artifacts that such battles likely took place. But hard physical evidence is much more limited. Archaeologists have now found the first direct osteological evidence: the skeleton of a Roman gladiator who encountered a wild animal in the arena, most likely a lion, based on bite marks evident on the pelvic bone, according to a paper published in the journal PLoS ONE.

The skeleton in question was that of a young man, age 26 to 35, buried between 200–300 CE near what is now York, England, formerly the Roman city of Eboracum. It's one of several such skeletons, mostly young men whose remains showed signs of trauma—hence the suggestion that it could be a gladiator burial site. "We used a method called structured light scanning [to study the skeleton]," co-author Tim Thompson of Maynooth University told Ars. "It's a method of creating a 3D model using grids of light. It's not like X-ray or CT, in that it only records the surface (not internal) features, but since it uses light and not X-rays etc, it is much safer, cheaper, and more portable. We have published a fair bit on this and shown its use in both archaeological and forensic contexts."

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The Department of Justice (DOJ) rested its case in Google's search remedy trial earlier this week, giving Google a chance to push back on the government's attempt to break up the search giant. Today is arguably Google's best chance to make the case that it should not be harshly penalized in the ongoing search antitrust case, with CEO Sundar Pichai taking the stand.

Pichai attempted to explain why Google isn't abusing its market position and why the DOJ's proposed remedies are too extreme. The issue of Chrome divestment came up, but Google's team also focused intensely on the potential effects of the DOJ's data remedies , which could force Google to share its search index and technology with other firms.

A de facto spin-off

Pichai, who chose to stand while giving testimony, took issue with the government's proposal to force Google to license search technology to other companies. The DOJ claims that Google's status as a monopolist has resulted in it accumulating a huge volume of user data on search behavior. Plus, its significant technological lead means its index of the web is much more robust than competing services.

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From the department of head scratches comes this counterintuitive news: Microsoft says it has no plans to change a remote login protocol in Windows that allows people to log in to machines using passwords that have been revoked.

Password changes are among the first steps people should take in the event a password has been leaked or an account has been compromised. People expect that once they've taken this step, none of the devices that relied on the password can be accessed.

Not just a bug

The Remote Desktop Protocol —the proprietary mechanism built into Windows for allowing a remote user to log in to and control a machine as if they were directly in front of it—however, will in many cases continue trusting a password even after a user has changed it. Microsoft says the behavior is a design decision to ensure users never get locked out.

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With the rise of Robert F. Kennedy Jr., brain worms have gotten a bad rap.

A year ago, the long-time anti-vaccine advocate and current US health secretary famously told The New York Times that a parasitic worm " got into my brain and ate a portion of it and then died ." The startling revelation is now frequently referenced whenever Kennedy says something outlandish, false, or offensive—which is often. For those who have followed his anti-vaccine advocacy, it's frightfully clear that, worm-infested or not, Kennedy's brain is marinated in wild conspiracy theories and dangerous misinformation.

While it's certainly possible that worm remnants could impair brain function, it remains unknown if the worm is to blame for Kennedy's cognitive oddities. For one thing, he was also diagnosed with mercury poisoning, which can cause brain damage, too. As prominent infectious disease expert Anthony Fauci said last June in a conversation with political analyst David Axelrod: "I don't know what's going on in [Kennedy's] head, but it's not good."

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