Beth Washington – Page 22

Sleeping pills stop the brain’s system for cleaning out waste

Biology, brain, Features, neurobiology, nREM sleep, Science, sleeping pills / Beth Washington / January 20, 2025

Cleanup on aisle cerebellum

A specialized system sends pulses of pressure through the fluids in our brain.

Our bodies rely on their lymphatic system to drain excessive fluids and remove waste from tissues, feeding those back into the blood stream. It’s a complex yet efficient cleaning mechanism that works in every organ except the brain. “When cells are active, they produce waste metabolites, and this also happens in the brain. Since there are no lymphatic vessels in the brain, the question was what was it that cleaned the brain,” Natalie Hauglund, a neuroscientist at Oxford University who led a recent study on the brain-clearing mechanism, told Ars.

Earlier studies done mostly on mice discovered that the brain had a system that flushed its tissues with cerebrospinal fluid, which carried away waste products in a process called glymphatic clearance. “Scientists noticed that this only happened during sleep, but it was unknown what it was about sleep that initiated this cleaning process,” Hauglund explains.

Her study found the glymphatic clearance was mediated by a hormone called norepinephrine and happened almost exclusively during the NREM sleep phase. But it only worked when sleep was natural. Anesthesia and sleeping pills shut this process down nearly completely.

Taking it slowly

The glymphatic system in the brain was discovered back in 2013 by Dr. Maiken Nedergaard, a Danish neuroscientist and a coauthor of Hauglund’s paper. Since then, there have been numerous studies aimed at figuring out how it worked, but most of them had one problem: they were done on anesthetized mice.

“What makes anesthesia useful is that you can have a very controlled setting,” Hauglund says.

Most brain imaging techniques require a subject, an animal or a human, to be still. In mouse experiments, that meant immobilizing their heads so the research team could get clear scans. “But anesthesia also shuts down some of the mechanisms in the brain,” Hauglund argues.

So, her team designed a study to see how the brain-clearing mechanism works in mice that could move freely in their cages and sleep naturally whenever they felt like it. “It turned out that with the glymphatic system, we didn’t really see the full picture when we used anesthesia,” Hauglund says.

Looking into the brain of a mouse that runs around and wiggles during sleep, though, wasn’t easy. The team pulled it off by using a technique called flow fiber photometry which works by imaging fluids tagged with fluorescent markers using a probe implanted in the brain. So, the mice got the optical fibers implanted in their brains. Once that was done, the team put fluorescent tags in the mice’s blood, cerebrospinal fluid, and on the norepinephrine hormone. “Fluorescent molecules in the cerebrospinal fluid had one wavelength, blood had another wavelength, and norepinephrine had yet another wavelength,” Hauglund says.

This way, her team could get a fairly precise idea about the brain fluid dynamics when mice were awake and asleep. And it turned out that the glymphatic system basically turned brain tissues into a slowly moving pump.

Pumping up

“Norepinephrine is released from a small area of the brain in the brain stem,” Hauglund says. “It is mainly known as a response to stressful situations. For example, in fight or flight scenarios, you see norepinephrine levels increasing.” Its main effect is causing blood vessels to contract. Still, in more recent research, people found out that during sleep, norepinephrine is released in slow waves that roll over the brain roughly once a minute. This oscillatory norepinephrine release proved crucial to the operation of the glymphatic system.

“When we used the flow fiber photometry method to look into the brains of mice, we saw these slow waves of norepinephrine, but we also saw how it works in synchrony with fluctuation in the blood volume,” Hauglund says.

Every time the norepinephrine level went up, it caused the contraction of the blood vessels in the brain, and the blood volume went down. At the same time, the contraction increased the volume of the perivascular spaces around the blood vessels, which were immediately filled with the cerebrospinal fluid.

When the norepinephrine level went down, the process worked in reverse: the blood vessels dilated, letting the blood in and pushing the cerebrospinal fluid out. “What we found was that norepinephrine worked a little bit like a conductor of an orchestra and makes the blood and cerebrospinal fluid move in synchrony in these slow waves,” Hauglund says.

And because the study was designed to monitor this process in freely moving, undisturbed mice, the team learned exactly when all this was going on. When mice were awake, the norepinephrine levels were much higher but relatively steady. The team observed the opposite during the REM sleep phase, where the norepinephrine levels were consistently low. The oscillatory behavior was present exclusively during the NREM sleep phase.

So, the team wanted to check how the glymphatic clearance would work when they gave the mice zolpidem, a sleeping drug that had been proven to increase NREM sleep time. In theory, zolpidem should have boosted brain-clearing. But it turned it off instead.

Non-sleeping pills

“When we looked at the mice after giving them zolpidem, we saw they all fell asleep very quickly. That was expected—we take zolpidem because it makes it easier for us to sleep,” Hauglund says. “But then we saw those slow fluctuations in norepinephrine, blood volume, and cerebrospinal fluid almost completely stopped.”

No fluctuations meant the glymphatic system didn’t remove any waste. This was a serious issue, because one of the cellular waste products it is supposed to remove is amyloid beta, found in the brains of patients suffering from Alzheimer’s disease.

Hauglund speculates it could be possible zolpidem induces a state very similar to sleep but at the same time it shuts down important processes that happen during sleep. While heavy zolpidem use has been associated with increased risk of the Alzheimer disease, it is not clear if this increased risk was there because the drug was inhibiting oscillatory norepinephrine release in the brain. To better understand this, Hauglund wants to get a closer look into how the glymphatic system works in humans.

“We know we have the same wave-like fluid dynamics in the brain, so this could also drive the brain clearance in humans,” Haugland told Ars. “Still, it’s very hard to look at norepinephrine in the human brain because we need an invasive technique to get to the tissue.”

But she said norepinephrine levels in people can be estimated based on indirect clues. One of them is pupil dilation and contraction, which work in in synchrony with the norepinephrine levels. Another other clue may lay in microarousals—very brief, imperceivable awakenings which, Hauglund thinks, can be correlated with the brain clearing mechanism. “I am currently interested in this phenomenon […]. Right now we have no idea why microarousals are there or what function they have” Hauglund says.

But the last step she has on her roadmap is making better sleeping pills. “We need sleeping drugs that don’t have this inhibitory effect on the norepinephrine waves. If we can have a sleeping pill that helps people sleep without disrupting their sleep at the same time it will be very important,” Hauglund concludes.

Cell, 2025. DOI: 10.1016/j.cell.2024.11.027

Jacek Krywko is a freelance science and technology writer who covers space exploration, artificial intelligence research, computer science, and all sorts of engineering wizardry.

Sleeping pills stop the brain’s system for cleaning out waste Read More »

TikTok is mostly restored after Trump pledges an order and half US ownership

bytedance, Donald Trump, Policy, President Donald Trump, Tech, tiktok / Beth Washington / January 20, 2025

At a rally Sunday, he did not clarify if this meant a US-based business or the government itself. “So they’ll have a partner, the United States, and they’ll have a lot of bidders … And there’s no risk, we’re not putting up any money. All we’re doing is giving them the approval without which they don’t have anything,” Trump said Sunday.

Legal limbo

Trump’s order, and TikTok’s return to service, both seem at odds with the law—and leadership in the Republican party. Speaker Mike Johnson said on NBC’s Meet the Press Sunday that Congress would “enforce the law.” Sens. Tom Cotton (R-Ark.) and Pete Ricketts (R-Neb.) issued a joint statement Sunday, commending Apple, Microsoft, and Google for “following the law,” and noting that other companies “face ruinous bankruptcy” for violating it.

“Now that the law has taken effect, there’s no legal basis for any kind of ‘extension’ of its effective date,” the statement read. The law states that “A path to executing a qualified divestiture” has to be determined before a one-time extension of 90 days can be granted.

TikTok’s best chance at avoiding a shutdown vanished in last week’s unanimous Supreme Court decision upholding the divest-or-sell law. Aimed at protecting national security interests from TikTok’s Chinese owners having access to the habits and data of 170 million American users, the law was ruled to be “content-neutral,” and that the US “had good reason to single out TikTok for special treatment.”

Reports at Forbes, Bloomberg, and elsewhere have suggested that ByteDance and its Chinese owners could be seeking to use TikTok as a bargaining chip, with maneuvers including a sale to Trump ally Elon Musk as a means of counteracting Trump’s proposed tariffs on Chinese imports.

One largely unforeseen side effect of Congress’ TikTok-centered actions is that Marvel Snap, a mobile collectible card and deck-building game, disappeared in similar fashion over the weekend. The game, developed by a California-based team, is published by ByteDance’s Nuverse mobile game division. With no web version available, Snap remained unavailable on app stores Monday morning. A message to players with the game installed noted that “This outage is a surprise to us and wasn’t planned,” though it pledged to restore the game.

TikTok is mostly restored after Trump pledges an order and half US ownership Read More »

Hollywood mourns the loss of David Lynch

culture, David Lynch, Entertainment, film, Obituaries, television / Beth Washington / January 17, 2025

The success of Lynch’s next film, Blue Velvet, helped assuage his disappointment, as did his move to television with the bizarrely surreal and influential series Twin Peaks—part detective story, part soap opera, with dashes of sci-fi and horror. The series spawned a spin-off prequel movie, Twin Peaks: Fire Walk With Me (1992), and a 2017 revival series, Twin Peaks: The Return, that picks up the storyline 25 years later. Many other TV series were influenced by Lynch’s show, including The X-Files, Lost, The Sopranos, Bates Motel, Fargo, Riverdale, Atlanta, and the animated series Gravity Falls.

His final feature films were an LA-centric trilogy—Lost Highway (1997), Mulholland Drive, and Inland Empire (2006)—and 1999’s biographical road drama, The Straight Story, based on the true story of a man named Alvin Straight who drove across Iowa and Wisconsin on a lawn mower. It was acquired by Walt Disney Pictures and was Lynch’s only G-rated film.

“A singular visionary dreamer”

The director’s filmography also includes an assortment of short films, all bearing his eccentric stamp, including a surrealist short, Absurda, shown at Cannes in 2007, as well as Premonition Following an Evil Deed (NSFW YouTube link), Lynch’s contribution to the 1995 anthology film Lumière and Company. All 41 featured directors used the original Cinématographe camera invented by the Lumière brothers. Lynch was also an avid painter, cartoonist, and musician and directed several music videos for such artists as Moby and Nine Inch Nails. Until his death, he hosted quirky online “weather reports” and a web series, What Is David Lynch Working on Today? He even racked up the occasional acting credit.

Lynch received an Honorary Oscar in 2000 for lifetime achievement at the Governors Awards after three prior nominations for The Elephant Man, Blue Velvet, and Mulholland Drive. Deadline’s Pete Hammond called Lynch’s speech “probably one of the shortest for any Oscar acceptance.” Lynch briefly thanked the Academy, the other honorees, wished everyone a great night, then pointed to the statuette and said, “You have a very interesting figure. Good night.” At Cannes, he won the Palme d’Or in 1990 for Wild at Heart and won Best Director in 2001 for Mulholland Drive.

Naomi Watts, who played a dual role as doppelgängers Betty Elms and Diane Selwyn in Mulholland Drive, said that Lynch put her “on the map” as an actor by casting her. “It wasn’t just his art that impacted me—his wisdom, humor, and love gave me a special sense of belief in myself I’d never accessed before,” she said in a statement. “Every moment together felt charged with a presence I’ve rarely seen or known. Probably because, yes, he seemed to live in an altered world, one that I feel beyond lucky to have been a small part of. And David invited all to glimpse into that world through his exquisite storytelling, which elevated cinema and inspired generations of filmmakers across the globe.”

Hollywood mourns the loss of David Lynch Read More »

Google is about to make Gemini a core part of Workspaces—with price changes

AI, Enterprise, Gemini, Google, Google Workspace, Tech / Beth Washington / January 16, 2025

Google has added AI features to its regular Workspace accounts for business while slightly raising the baseline prices of Workspace plans.

Previously, AI tools in the Gemini Business plan were a $20 per seat add-on to existing Workspace accounts, which had a base cost of $12 per seat without. Now, the AI tools are included for all Workspace users, but the per-seat base price is increasing from $12 to $14.

That means that those who were already paying extra for Gemini are going to pay less than half of what they were—effectively $14 per seat instead of $32. But those who never used or wanted Gemini or any other newer features under the AI umbrella from Workspace are going to pay a little bit more than before.

Features covered here include access to Gemini Advanced, the NotebookLM research assistant, email and document summaries in Gmail and Docs, adaptive audio and additional transcription languages for Meet, and “help me write” and Gemini in the side panel across a variety of applications.

Google says that it plans “to roll out even more AI features previously available in Gemini add-ons only.”

Google is about to make Gemini a core part of Workspaces—with price changes Read More »

Here’s what NASA would like to see SpaceX accomplish with Starship this year

artemis, Commercial space, human spaceflight, launch, moon, NASA, Science, Space, spacex, Starbase, starship, texas / Beth Washington / January 16, 2025

Iterate, iterate, and iterate some more

The seventh test flight of Starship is scheduled for launch Thursday afternoon.

SpaceX’s upgraded Starship rocket stands on its launch pad at Starbase, Texas. Credit: SpaceX

SpaceX plans to launch the seventh full-scale test flight of its massive Super Heavy booster and Starship rocket Thursday afternoon. It’s the first of what might be a dozen or more demonstration flights this year as SpaceX tries new things with the most powerful rocket ever built.

There are many things on SpaceX’s Starship to-do list in 2025. They include debuting an upgraded, larger Starship, known as Version 2 or Block 2, on the test flight preparing to launch Thursday. The one-hour launch window opens at 5 pm EST (4 pm CST; 22: 00 UTC) at SpaceX’s launch base in South Texas. You can watch SpaceX’s live webcast of the flight here.

SpaceX will again attempt to catch the rocket’s Super Heavy booster—more than 20 stories tall and wider than a jumbo jet—back at the launch pad using mechanical arms, or “chopsticks,” mounted to the launch tower. Read more about the Starship Block 2 upgrades in our story from last week.

You might think of next week’s Starship test flight as an apéritif before the entrées to come. Ars recently spoke with Lisa Watson-Morgan, the NASA engineer overseeing the agency’s contract with SpaceX to develop a modified version of Starship to land astronauts on the Moon. NASA has contracts with SpaceX worth more than $4 billion to develop and fly two Starship human landing missions under the umbrella of the agency’s Artemis program to return humans to the Moon.

We are publishing the entire interview with Watson-Morgan below, but first, let’s assess what SpaceX might accomplish with Starship this year.

There are many things to watch for on this test flight, including the deployment of 10 satellite simulators to test the ship’s payload accommodations and the performance of a beefed-up heat shield as the vehicle blazes through the atmosphere for reentry and splashdown in the Indian Ocean.

If this all works, SpaceX may try to launch a ship into low-Earth orbit on the eighth flight, expected to launch in the next couple of months. All of the Starship test flights to date have intentionally flown on suborbital trajectories, bringing the ship back toward reentry over the sea northwest of Australia after traveling halfway around the world.

Then, there’s an even bigger version of Starship called Block 3 that could begin flying before the end of the year. This version of the ship is the one that SpaceX will use to start experimenting with in-orbit refueling, according to Watson-Morgan.

In order to test refueling, two Starships will dock together in orbit, allowing one vehicle to transfer super-cold methane and liquid oxygen into the other. Nothing like this on this scale has ever been attempted before. Future Starship missions to the Moon and Mars may require 10 or more tanker missions to gas up in low-Earth orbit. All of these missions will use different versions of the same basic Starship design: a human-rated lunar lander, a propellant depot, and a refueling tanker.

Artist’s illustration of Starship on the surface of the Moon. Credit: SpaceX

Questions for 2025

Catching Starship back at its launch tower and demonstrating orbital propellant transfer are the two most significant milestones on SpaceX’s roadmap for 2025.

SpaceX officials have said they aim to fly as many as 25 Starship missions this year, allowing engineers to more rapidly iterate on the vehicle’s design. SpaceX is constructing a second launch pad at its Starbase facility near Brownsville, Texas, to help speed up the launch cadence.

Can SpaceX achieve this flight rate in 2025? Will faster Starship manufacturing and reusability help the company fly more often? Will SpaceX fly its first ship-to-ship propellant transfer demonstration this year? When will Starship begin launching large batches of new-generation Starlink Internet satellites?

Licensing delays at the Federal Aviation Administration have been a thorn in SpaceX’s side for the last couple of years. Will those go away under the incoming administration of President-elect Donald Trump, who counts SpaceX founder Elon Musk as a key adviser?

And will SpaceX gain a larger role in NASA’s Artemis lunar program? The Artemis program’s architecture is sure to be reviewed by the Trump administration and the nominee for the agency’s next administrator, billionaire businessman and astronaut Jared Isaacman.

The very expensive Space Launch System rocket, developed by NASA with Boeing and other traditional aerospace contractors, might be canceled. NASA currently envisions the SLS rocket and Orion spacecraft as the transportation system to ferry astronauts between Earth and the vicinity of the Moon, where crews would meet up with a landing vehicle provided by commercial partners SpaceX and Blue Origin.

Watson-Morgan didn’t have answers to all of these questions. Many of them are well outside of her purview as Human Landing System program manager, so Ars didn’t ask. Instead, Ars discussed technical and schedule concerns with her during the half-hour interview. Here is one part of the discussion, lightly edited for clarity.

Ars: What do you hope to see from Flight 7 of Starship?

Lisa Watson-Morgan: One of the exciting parts of working with SpaceX are these test flights. They have a really fast turnaround, where they put in different lessons learned. I think you saw many of the flight objectives that they discussed from Flight 6, which was a great success. I think they mentioned different thermal testing experiments that they put on the ship in order to understand the different heating, the different loads on certain areas of the system. All that was really good with each one of those, in addition to how they configure the tiles. Then, from that, there’ll be additional tests that they will put on Flight 7, so you kind of get this iterative improvement and learning that we’ll get to see in Flight 7. So Flight 7 is the first Version 2 of their ship set. When I say that, I mean the ship, the booster, all the systems associated with it. So, from that, it’s really more just understanding how the system, how the flaps, how all of that interacts and works as they’re coming back in. Hopefully we’ll get to see some catches, that’s always exciting.

Ars: How did the in-space Raptor engine relight go on Flight 6 (on November 19)?

Lisa Watson-Morgan: Beautifully. And that’s something that’s really important to us because when we’re sitting on the Moon… well, actually, the whole path to the Moon as we are getting ready to land on the Moon, we’ll perform a series of maneuvers, and the Raptors will have an environment that is very, very cold. To that, it’s going to be important that they’re able to relight for landing purposes. So that was a great first step towards that. In addition, after we land, clearly the Raptors will be off, and it will get very cold, and they will have to relight in a cold environment (to get off the Moon). So that’s why that step was critical for the Human Landing System and NASA’s return to the Moon.

A recent artist’s illustration of two Starships docked together in low-Earth orbit. Credit: SpaceX

Ars: Which version of the ship is required for the propellant transfer demonstration, and what new features are on that version to enable this test?

Lisa Watson-Morgan: We’re looking forward to the Version 3, which is what’s coming up later on, sometime in ’25, in the near term, because that’s what we need for propellant transfer and the cryo fluid work that is also important to us… There are different systems in the V3 set that will help us with cryo fluid management. Obviously, with those, we have to have the couplers and the quick-disconnects in order for the two systems to have the right guidance, navigation, trajectory, all the control systems needed to hold their station-keeping in order to dock with each other, and then perform the fluid transfer. So all the fluid lines and all that’s associated with that, those systems, which we have seen in tests and held pieces of when we’ve been working with them at their site, we’ll get to see those actually in action on orbit.

Ars: Have there been any ground tests of these systems, whether it’s fluid couplers or docking systems? Can you talk about some of the ground tests that have gone into this development?

Lisa Watson-Morgan: Oh, absolutely. We’ve been working with them on ground tests for this past year. We’ve seen the ground testing and reviewed the data. Our team works with them on what we deem necessary for the various milestones. While the milestone contains proprietary (information), we work closely with them to ensure that it’s going to meet the intent, safety-wise as well as technically, of what we’re going to need to see. So they’ve done that.

Even more exciting, they have recently shipped some of their docking systems to the Johnson Space Center for testing with the Orion Lockheed Martin docking system, and that’s for Artemis III. Clearly, that’s how we’re going to receive the crew. So those are some exciting tests that we’ve been doing this past year as well that’s not just focused on, say, the booster and the ship. There are a lot of crew systems that are being developed now. We’re in work with them on how we’re going to effectuate the crew manual control requirements that we have, so it’s been a great balance to see what the crew needs, given the size of the ship. That’s been a great set of work. We have crew office hours where the crew travels to Hawthorne [SpaceX headquarters in California] and works one-on-one with the different responsible engineers in the different technical disciplines to make sure that they understand not just little words on the paper from a requirement, but actually what this means, and then how systems can be operated.

Ars: For the docking system, Orion uses the NASA Docking System, and SpaceX brings its own design to bear on Starship?

Lisa Watson-Morgan: This is something that I think the Human Landing System has done exceptionally well. When we wrote our high-level set of requirements, we also wrote it with a bigger picture in mind—looked into the overall standards of how things are typically done, and we just said it has to be compliant with it. So it’s a docking standard compliance, and SpaceX clearly meets that. They certainly do have the Dragon heritage, of course, with the International Space Station. So, because of that, we have high confidence that they’re all going to work very well. Still, it’s important to go ahead and perform the ground testing and get as much of that out of the way as we can.

Lisa Watson-Morgan, NASA’s HLS program manager, is based at Marshall Space Flight Center in Huntsville, Alabama. Credit: ASA/Aubrey Gemignani

Ars: How far along is the development and design of the layout of the crew compartment at the top of Starship? Is it far along, or is it still in the conceptual phase? What can you say about that?

Lisa Watson-Morgan: It’s much further along there. We’ve had our environmental control and life support systems, whether it’s carbon dioxide monitoring fans to make sure the air is circulating properly. We’ve been in a lot of work with SpaceX on the temperature. It’s… a large area (for the crew). The seats, making sure that the crew seats and the loads on that are appropriate. For all of that work, as the analysis work has been performed, the NASA team is reviewing it. They had a mock-up, actually, of some of their life support systems even as far back as eight-plus months ago. So there’s been a lot of progress on that.

Ars: Is SpaceX planning to use a touchscreen design for crew displays and controls, like they do with the Dragon spacecraft?

Lisa Watson-Morgan: We’re in talks about that, about what would be the best approach for the crew for the dynamic environment of landing.

Ars: I can imagine it is a pretty dynamic environment with those Raptor engines firing. It’s almost like a launch in reverse.

Lisa Watson-Morgan: Right. Those are some of the topics that get discussed in the crew office hours. That’s why it’s good to have the crew interacting directly, in addition to the different discipline leads, whether it’s structural, mechanical, propulsion, to have all those folks talking guidance and having control to say, “OK, well, when the system does this, here’s the mode we expect to see. Here’s the impact on the crew. And is this condition, or is the option space that we have on the table, appropriate for the next step, with respect to the displays.”

Ars: One of the big things SpaceX needs to prove out before going to the Moon with Starship is in-orbit propellant transfer. When do you see the ship-to-ship demonstration occurring?

Lisa Watson-Morgan: I see it occurring in ’25.

Ars: Anything more specific about the schedule for that?

Lisa Watson-Morgan: That’d be a question for SpaceX because they do have a number of flights that they’re performing commercially, for their maturity. We get the benefit of that. It’s actually a great partnership. I’ll tell you, it’s really good working with them on this, but they’d have to answer that question. I do foresee it happening in ’25.

Ars: What things do you need to see SpaceX accomplish before they’re ready for the refueling demo? I’m thinking of things like the second launch tower, potentially. Do they need to demonstrate a ship catch or anything like that before going for orbital refueling?

Lisa Watson-Morgan: I would say none of that’s required. You just kind of get down to, what are the basics? What are the basics that you need? So you need to be able to launch rapidly off the same pad, even. They’ve shown they can launch and catch within a matter of minutes. So that is good confidence there. The catching is part of their reuse strategy, which is more of their commercial approach, and not a NASA requirement. NASA reaps the benefit of it by good pricing as a result of their commercial model, but it is not a requirement that we have. So they could theoretically use the same pad to perform the propellant transfer and the long-duration flight, because all it requires is two launches, really, within a specified time period to where the two systems can meet in a planned trajectory or orbit to do the propellant transfer. So they could launch the first one, and then within a week or two or three, depending on what the concept of operations was that we thought we could achieve at that time, and then have the propellant transfer demo occur that way. So you don’t necessarily need two pads, but you do need more thermal characterization of the ship. I would say that is one of the areas (we need to see data on), and that is one of the reasons, I think, why they’re working so diligently on that.

Ars: You mentioned the long-duration flight demonstration. What does that entail?

Lisa Watson-Morgan: The simple objectives are to launch two different tankers or Starships. The Starship will eventually be a crewed system. Clearly, the ones that we’re talking about for the propellant transfer are not. It’s just to have the booster and Starship system launch, and within a few weeks, have another one launch, and have them rendezvous. They need to be able to find each other with their sensors. They need to be able to come close, very, very close, and they need to be able to dock together, connect, do the quick connect, and make sure they are able, then, to flow propellant and LOX (liquid oxygen) to another system. Then, we need to be able to measure the quantity of how much has gone over. And from that, then they need to safely undock and dispose.

Ars: So the long-duration flight demonstration is just part of what SpaceX needs to do in order to be ready for the propellant transfer demonstration?

Lisa Watson-Morgan: We call it long duration just because it’s not a 45-minute or an hour flight. Long duration, obviously, that’s a relative statement, but it’s a system that can stay up long enough to be able to find another Starship and perform those maneuvers and flow of fuel and LOX.

Ars: How much propellant will you transfer with this demonstration, and do you think you’ll get all the data you need in one demonstration, or will SpaceX need to try this several times?

Lisa Watson-Morgan: That’s something you can ask SpaceX (about how much propellant will be transferred). Clearly, I know, but there’s some sensitivity there. You’ve seen our requirements in our initial solicitation. We have thresholds and goals, meaning we want you to at least do this, but more is better, and that’s typically how we work almost everything. Working with commercial industry in these fixed-price contracts has worked exceptionally well, because when you have providers that are also wanting to explore commercially or trying to make a commercial system, they are interested in pushing more than what we would typically ask for, and so often we get that for an incredibly fair price.

Stephen Clark is a space reporter at Ars Technica, covering private space companies and the world’s space agencies. Stephen writes about the nexus of technology, science, policy, and business on and off the planet.

Here’s what NASA would like to see SpaceX accomplish with Starship this year Read More »

This PDF contains a playable copy of Doom

gaming / Beth Washington / January 15, 2025

Here at Ars, we’re suckers for stories about hackers getting Doom running on everything from CAPTCHA robot checks and Windows’ notepad.exe to AI hallucinations and fluorescing gut bacteria. Despite all that experience, we were still thrown for a loop by a recent demonstration of Doom running in the usually static confines of a PDF file.

On the Github page for the quixotic project, coder ading2210 discusses how Adobe Acrobat included some robust support for JavaScript in the PDF file format. That JS coding support—which dates back decades and is still fully documented in Adobe’s official PDF specs—is currently implemented in a more limited, more secure form as part of PDFium, the built-in PDF-rendering engine of Chromium-based browsers.

In the past, hackers have used this little-known Adobe feature to code simple games like Breakout and Tetris into PDF documents. But ading220 went further, recompiling a streamlined fork of Doom‘s open source code using an old version of Emscripten that outputs optimized asm.js code.

With that code loaded, the Doom PDF can take inputs via the user typing in a designated text field and generate “video” output in the form of converted ASCII text fed into 200 individual text fields, each representing a horizontal line of the Doom display. The text in those fields is enough to simulate a six-color monochrome display at a “pretty poor but playable” 13 frames per second (about 80 ms per frame).

This PDF contains a playable copy of Doom Read More »

Ban on Chinese connected-car software is almost ready

Cars, connected cars / Beth Washington / January 14, 2025

However, the ban, as written, is not absolute. Companies can seek authorization to import software or hardware that would otherwise be outlawed, but the request would need to satisfy the US government and possibly be subject to conditions.

There are also exemptions for software for vehicles older than model year 2027 and hardware for vehicles older than model year 2030, including parts imported for warranty or repair work. (The government points out that retroactively applying the new rule would be a little pointless as any harm would already be done by vehicles that had compromised systems that predate it going into effect.)

And the final rule would only apply to light-duty vehicles. Anything with a gross vehicle weight rating of more than 10,000 lbs is exempt but will be dealt with in “a separate regulation tailored to the commercial sector in the coming months.”

Auto industry suppliers probably face the most disruption as a result of the new rule—just the presence of a Chinese-made module in a larger system is enough to trigger the import ban. But there should be little disruption to the US car market, at least for now.

Since the rules only go into effect from model year 2027, the few Chinese-made vehicles on sale in the US—models from Polestar, Volvo, Lincoln, and Buick—may remain on sale. However, Polestar’s Chinese ownership may prove somewhat of a sticking point compared to Ford and GM. Ars notes that lawyers representing Polestar met with the Commerce Department last week—we reached out to the automaker for a comment and will update this piece should we hear back.

Ban on Chinese connected-car software is almost ready Read More »

Mastodon’s founder cedes control, refuses to become next Musk or Zuckerberg

decentralized social media, elon musk, European Union, facebook, Instagram, mark zuckerberg, mastodon, Meta, Policy, social networks / Beth Washington / January 13, 2025

And perhaps in a nod to Meta’s recent changes, Mastodon also vowed to “invest deeply in trust and safety” and ensure “everyone, especially marginalized communities,” feels “safe” on the platform.

To become a more user-focused paradise of “resilient, governable, open and safe digital spaces,” Mastodon is going to need a lot more funding. The blog called for donations to help fund an annual operating budget of $5.1 million (5 million euros) in 2025. That’s a massive leap from the $152,476 (149,400 euros) total operating expenses Mastodon reported in 2023.

Other social networks wary of EU regulations

Mastodon has decided to continue basing its operations in Europe, while still maintaining a separate US-based nonprofit entity as a “fundraising hub,” the blog said.

It will take time, Mastodon said, to “select the appropriate jurisdiction and structure in Europe” before Mastodon can then “determine which other (subsidiary) legal structures are needed to support operations and sustainability.”

While Mastodon is carefully getting re-settled as a nonprofit in Europe, Zuckerberg this week went on Joe Rogan’s podcast to call on Donald Trump to help US tech companies fight European Union fines, Politico reported.

Some critics suggest the recent policy changes on Meta platforms were intended to win Trump’s favor, partly to get Trump on Meta’s side in the fight against the EU’s strict digital laws. According to France24, Musk’s recent combativeness with EU officials suggests Musk might team up with Zuckerberg in that fight (unlike that cage fight pitting the wealthy tech titans against each other that never happened).

Experts told France24 that EU officials may “perhaps wrongly” already be fearful about ruffling Trump’s feathers by targeting his tech allies and would likely need to use the “full legal arsenal” of EU digital laws to “stand up to Big Tech” once Trump’s next term starts.

As Big Tech prepares to continue battling EU regulators, Mastodon appears to be taking a different route, laying roots in Europe and “establishing the appropriate governance and leadership frameworks that reflect the nature and purpose of Mastodon as a whole” and “responsibly serve the community,” its blog said.

“Our core mission remains the same: to create the tools and digital spaces where people can build authentic, constructive online communities free from ads, data exploitation, manipulative algorithms, or corporate monopolies,” Mastodon’s blog said.

Mastodon’s founder cedes control, refuses to become next Musk or Zuckerberg Read More »

New York starts enforcing $15 broadband law that ISPs tried to kill

New York Affordable Broadband Act, Policy / Beth Washington / January 13, 2025

1.7 million New York households lost FCC discount

The order said quick implementation of the law is important because of “developments at the federal level impacting the affordability of broadband service.” About 1.7 million New York households, and 23 million nationwide, used to receive a monthly discount through an FCC program that expired in mid-2024 after Congress failed to provide more funding.

“For this reason, consumer benefit programs assisting low-income households—such as the ABA—are even more critical to ensure that the digital divide for low-income New Yorkers is being addressed,” the New York order said.

New York ISPs can obtain an exemption from the low-cost broadband law if they “provide service to no more than 20,000 households and the Commission determines that compliance with such requirements would result in ‘unreasonable or unsustainable financial impact on the broadband service provider,'” the order said.

Over 40 small ISPs filed for exemptions in 2021 before the law was blocked by a judge. Those ISPs and potentially others will be given one-month exemptions if they file paperwork by Wednesday stating that they meet the subscriber threshold. ISPs must submit detailed financial information by February 15 to obtain longer-term exemptions.

“All other ISPs (i.e., those with more than 20,000 subscribers) must comply with the ABA by January 15, 2025,” the order said. Failure to comply can be punished with civil penalties of up to $1,000 per violation. The law applies to wireline, fixed wireless, and satellite providers.

Charter Spectrum currently advertises a $25-per-month plan with 50Mbps speeds for low-income households. Comcast and Optimum have $15 plans. Verizon has a low-income program reducing the cost of some home Internet plans to as low as $20 a month.

Disclosure: The Advance/Newhouse Partnership, which owns 12.3 percent of Charter, is part of Advance Publications, which also owns Ars Technica parent Condé Nast.

New York starts enforcing $15 broadband law that ISPs tried to kill Read More »

Report: After many leaks, Switch 2 announcement could come “this week”

gaming, Nintendo, Nintendo Switch, nintendo switch 2, Switch, Tech / Beth Washington / January 13, 2025

Nintendo may be getting ready to make its Switch 2 console official. According to “industry whispers” collected by Eurogamer, as well as reporting from The Verge’s Tom Warren, the Switch 2 could be formally announced sometime this week. Eurogamer suggests the reveal is scheduled for this Thursday, January 16.

The reporting also suggests that the reveal will focus mostly on the console’s hardware design, with another game-centered announcement coming later. Eurogamer reports that the console won’t be ready to launch until April; this would be similar to Nintendo’s strategy for the original Switch, which was announced in mid-January 2017 but not launched until March.

Many things about the Switch 2’s physical hardware design have been thoroughly leaked at this point, thanks mostly to accessory makers who have been showing off their upcoming cases. Accessory maker Genki was at CES last week with a 3D-printed replica of the console based on the real thing, suggesting a much larger but still familiar-looking console with a design and button layout similar to the current Switch.

On the inside, the console is said to sport a new Nvidia-designed Arm processor with a much more powerful GPU and more RAM than the current Switch. Dubbed “T239,” Eurogamer reports that the chip includes 1,536 CUDA cores based on the Ampere architecture, the same used in 2020’s GeForce RTX 30-series graphics cards on the PC.

Report: After many leaks, Switch 2 announcement could come “this week” Read More »

Supreme Court lets Hawaii sue oil companies over climate change effects

climate change, fossil fuel companies, Hawaii, Honolulu, Policy, shell, Sunoco, Supreme Court / Beth Washington / January 13, 2025

On Monday, the Supreme Court declined to decide whether to block lawsuits that Honolulu filed to seek billions in damages from oil and gas companies over allegedly deceptive marketing campaigns that hid the effects of climate change.

Now those lawsuits can proceed, surely frustrating the fossil fuel industry, which felt that SCOTUS should have weighed in on this key “recurring question of extraordinary importance to the energy industry” raised in lawsuits seeking similarly high damages in several states, CBS News reported.

Defendants Sunoco and Shell, along with 15 other energy companies, had asked the court to intervene and stop the Hawaii lawsuits from proceeding. They had hoped to move the cases out of Hawaii state courts by arguing that interstate pollution is governed by federal law and the Clean Air Act.

The oil and gas companies continue to argue that greenhouse gas emissions “flow from billions of daily choices, over more than a century, by governments, companies, and individuals about what types of fuels to use, and how to use them.” Because of this, the companies believe Honolulu was wrong to demand damages based on the “cumulative effect of worldwide emissions leading to global climate change.”

“In these cases, state and local governments are attempting to assert control over the nation’s energy policies by holding energy companies liable for worldwide conduct in ways that starkly conflict with the policies and priorities of the federal government,” oil and gas companies unsuccessfully argued in their attempt to persuade SCOTUS to grant review. “That flouts this court’s precedents and basic principles of federalism, and the court should put a stop to it.”

Supreme Court lets Hawaii sue oil companies over climate change effects Read More »

The 8 most interesting PC monitors from CES 2025

CES, CES 2025, corsair, dell, Features, lg, Monitors, samsung, Tech / Beth Washington / January 12, 2025

Monitors worth monitoring

Here are upcoming computer screens with features that weren’t around last year.

Yes, that’s two monitors in a suitcase.

Plenty of computer monitors made debuts at the Consumer Electronics Show (CES) in Las Vegas this year, but many of the updates at this year’s event were pretty minor. Many could have easily been a part of 2024’s show.

But some brought new and interesting features to the table for 2025—in this article, we’ll tell you all about them.

LG’s 6K monitor

Pixel addicts are always right at home at CES, and the most interesting high-resolution computer monitor to come out of this year’s show is the LG UltraFine 6K Monitor (model 32U990A).

People seeking more than 3840×2160 resolution have limited options, and they’re all rather expensive (looking at you, Apple Pro Display XDR). LG’s 6K monitor means there’s another option for professionals needing extra pixels for things like developing, engineering, and creative work. And LG’s 6144×3456, 32-inch display has extra oomph thanks to something no other 6K monitor has: Thunderbolt 5.

This is the only image LG provided for the monitor. Credit: LG

LG hasn’t confirmed the refresh rate of its 6K monitor, so we don’t know how much bandwidth it needs. But it’s possible that pairing the UltraFine with a Thunderbolt 5 PC could trigger Bandwidth Boost, a Thunderbolt 5 feature that automatically increases bandwidth from 80Gbps to 120Gbps. For comparison, Thunderbolt 4 maxes out at 40Gbps. Thunderbolt 5 also requires 140 W power delivery and maxes out at 240 W. That’s a notable bump from Thunderbolt 4’s 100–140 W.

Considering that Apple’s only 6K monitor has Thunderbolt 3, Thunderbolt 5 is a differentiator. With this capability, the LG UltraFine is ironically better equipped in this regard for use with the new MacBook Pros and Mac Mini (which all have Thunderbolt 5) compared to Apple’s own monitors. LG may be aware of this, as the 32U990A’s aesthetic could be considered very Apple-like.

Inside the 32U990A’s silver chassis is a Nano IPS panel. In recent years, LG has advertised its Nano IPS panels as having “nanometer-sized particles” applied to their LED backlight to absorb “excess, unnecessary light wavelengths” for “richer color expression.” LG’s 6K monitor claims to cover 98 percent of DCI-P3 and 99.5 percent of Adobe RGB. IPS Black monitors, meanwhile, have higher contrast ratios (up to 3,000:1) than standard IPS panels. However, LG has released Nano IPS monitors with 2,000:1 contrast, the same contrast ratio as Dell’s 6K, IPS Black monitor.

LG hasn’t shared other details, like price or a release date. But the monitor may cost more than Dell’s Thunderbolt 4-equipped monitor, which is currently $2,480.

Brelyon’s multi-depth monitor

Brelyon Ultra Reality Extend. — Someone from CNET using the Ultra Reality Extend. Credit: CNET/YouTube

Brelyon is headquartered in San Mateo, California, and was founded by scientists and executives from MIT, IMAX, UCF, and DARPA. It’s been selling display technology for commercial and defense applications since 2022. At CES, the company unveiled the Ultra Reality Extend, describing it as an “immersive display line that renders virtual images in multiple depths.”

“As the first commercial multi-focal monitor, the Extend model offers multi-depth programmability for information overlay, allowing users to see images from 0.7 m to as far as 2.5 m of depth virtually rendered behind the monitor; organizing various data streams at different depth layers, or triggering focal cues to induce an ultra immersive experience akin to looking out through a window,” Brelyon’s announcement said.

Brelyon says the monitor runs 4K at 60 Hz with 1 bit of monocular depth for an 8K effect. The monitor includes “OLED-based curved 2D virtual images, with the largest stretching to 122 inches and extending 2.5 meters deep, viewable through a 30-inch frame,” according to the firm’s announcement. The closer you sit, the greater the field of view you get.

The Extend leverages “new GPU capabilities to process light and video signals inside our display platforms,” Brelyon CEO Barmak Heshmat said in a statement this week. He added: “We are thinking beyond headsets and glasses, where we can leverage GPU capabilities to do real-time driving of higher-bandwidth display interfaces.”

Brelyon says this was captured from the Extend, with its camera lens focus changing from 70 cm to 2,500 cm. Credit: Brelyon

Advancements in AI-based video processing, as well as other software advancements and hardware improvements, purportedly enable the Extend to upscale lower-dimension streams to multiple, higher-dimension ones. Brelyon describes its product as a “generative display system” that uses AI computation and optics to assign different depth values to content in real time for rendering images and information overlays.

The idea of a virtual monitor that surpasses the field of view of typical desktop monitors while allowing users to see the real world isn’t new. Tech firms (including many at CES) usually try to accomplish this through AR glasses. But head-mounted displays still struggle with problems like heat, weight, computing resources, battery, and aesthetics.

Brelyon’s monitor seemingly demoed well at CES. Sam Rutherford, a senior writer at Engadget, watched a clip from the Marvel’s Spider-Man video game on the Extend and said that “trees and light poles whipping past in my face felt so real I started to flinch subconsciously.” He added that the monitor separated “different layers of the content to make snow in the foreground look blurry as it whipped across the screen, while characters in the distance” still looked sharp.

The monitor costs $5,000 to $8,000 depending on how you’ll use it and whether you have other business with Brelyon, per Engadget, and CES is one of the few places where people could actually see the display in action.

Samsung’s 3D monitor

Samsung Odyssey 3D — Samsung’s depiction of the 3D effect of its 3D PC monitor. Credit: Samsung

It’s 2025, and tech companies are still trying to convince people to bring a 3D display into their homes. This week, Samsung took its first swing since 2009 at 3D screens with the Odyssey 3D monitor.

In lieu of 3D glasses. the Odyssey 3D achieves its 3D effect with a lenticular lens “attached to the front of the panel and its front stereo camera,” Samsung says, as well eye tracking and view mapping. Differing from other recent 3D monitors, the Odyssey 3D claims to be able to make 2D content look three-dimensional even if that content doesn’t officially support 3D.

You can find more information in our initial coverage of Samsung’s Odyssey 3D, but don’t bet on finding 3D monitors in many people’s homes soon. The technology for quality 3D displays that work without glasses has been around for years but still has never taken off.

Dell’s OLED productivity monitor

With improvements in burn-in, availability, and brightness, finding OLED monitors today is much easier than it was two years ago. But a lot of the OLED monitors released recently target gamers with features like high refresh rates, ultrawide panels, and RGB. These features are unneeded or unwanted by non-gamers but contribute to OLED monitors’ already high pricing. Numerous smaller OLED monitors were announced at CES, with 27-inch, 4K models being a popular addition. Most of them are still high-refresh gaming monitors, though.

The Dell 32-inch QD-OLED, on the other hand, targets “play, school, and work,” Dell’s announcement says. And its naming (based on a new naming convention Dell announced this week that kills XPS and other longstanding branding) signals that this is a mid-tier monitor from Dell’s entry-level lineup.

The monitor’s specs, which include a 120 Hz refresh rate, AMD FreeSync Premium, and USB-C power delivery at up to 90 W, make it a good fit for pairing with many mainstream laptops.

Dell also says this is the first QD-OLED with spatial audio, which uses head tracking to alter audio coming from the monitor’s five 5 W speakers. This is a feature we’ve seen before, but not on an OLED monitor.

For professionals and/or Mac users that prefer the sleek looks, reputation, higher power delivery and I/O hubs associated with Dell’s popular UltraSharp line, Dell made two more notable announcements at CES: an UltraSharp 32 4K Thunderbolt Hub Monitor (U3225QE) coming out in February 25 for $950 and an UltraSharp 27 4K Thunderbolt Hub Monitor (U2725QE) coming out that same day for $700.

The suitcase monitors

Before we get into the Base Case, please note that this product has no release date because its creators plan to go to market via crowdfunding. Base Case says it will launch its Indiegogo campaign next month, but even then, we don’t know if the project will be funded, if any final product will work as advertised, or if customers will receive orders in a timely fashion. Still, this is one of the most unusual monitors at CES, and it’s worth discussing.

The Base Case is shaped like a 24x14x16.5-inch rolling suitcase, but when you open it up, you’ll find two 24-inch monitors for connecting to a laptop. Each screen reportedly has a 1920×1080 resolution, a 75 Hz refresh rate, and a max brightness claim of 350 nits. Base Case is also advertising PC and Mac support (through DisplayLink), as well as HDMI, USB-C, USB-A, Thunderbolt, and Ethernet ports. Telescoping legs allow the case to rise 10 inches so the display can sit closer to eye level.

Ultimately, the Base Case would see owners lug around a 20-pound product for the ability to quickly create a dual-monitor setup equipped with a healthy amount of I/O. Tom’s Guide demoed a prototype at CES and reported that the monitors took “seconds to set up.”

In case you’re worried that the Base Case prioritizes displays over storage, note that its makers plan on adding a front pocket to the suitcase that can fit a laptop. The pocket wasn’t on the prototype Tom’s Guide saw, though.

Again, this is far from a finalized product, but Base Case has alluded to a $2,400 starting price. For comparison to other briefcase-locked displays—and yes, doing this is possible—LG’s StanbyME Go (27LX5QKNA) tablet in a briefcase currently has a $1,200 MSRP.

Corsair’s PC-mountable touchscreen

If the Base Case is on the heftier side of portable monitors, Corsair’s Xeneon Edge is certainly on the minute side. The 14.5-inch LCD touchscreen isn’t meant to be a primary display, though. Corsair built it as a secondary screen for providing quick information, like the song your computer is playing, the weather, the time, and calendar events. You could also use the 2560×720 pixels to display system information, like component usage and temperatures.

Corsair says its iCue software will be able to provide system information on the Xeneon, but because the Xeneon Edge works like a regular monitor, you could (and likely would prefer to) use your own methods. Still, the Xeneon Edge stands out from other small, touchscreen PC monitors with its clean UI that can succinctly communicate a lot of information on the tiny display at once.

Specs-wise, this is a 60 Hz IPS panel with 5-point capacitive touch. Corsair says the monitor can hit 350 nits of brightness.

You can connect the Xeneon Edge to a computer via USB-C (DisplayPort Alt mode) or HDMI. There are also screw holes, so PC builders could install it via a 360 mm radiator mounting point inside their PC case.

Alternatively, Corsair recommends attaching the touchscreen to the outside of a PC case through the monitor’s 14 integrated magnets. Corsair said in a blog post that the “magnets are underneath the plastic casing so the metal surface you stick it to won’t get scratched.” Or, in traditional portable monitor style, the Xeneon Edge could also just sit on a desk with its included stand.

Corsair Xeneon Edge — Corsair demos different ways the screen could attach to a case. Credit: TechPowerUp/YouTube

Corsair plans to release the Xeneon Edge in Q2. Expected pricing is “around $249,” Tom’s Hardware reported.

MSI’s side panel display panel

Why attach a monitor to your PC case when you can turn your PC case into a monitor instead?

MSI says that the touchscreen embedded into this year’s MEG Vision X AI 2nd gaming desktop’s side panel can work like a regular computer monitor. Similar to Corsair’s monitor, the MSI’s display has a corresponding app that can show system information and other customizations, which you can toggle with controls on the front of the case, PCMag reported.

MSI used an IPS panel with 1920×1080 resolution for the display, which also has an integrated mic and speaker. MSI says “electric vehicle control centers” inspired the design. We’ve seen similar PC cases, like iBuyPower’s more translucent side panel display and the touchscreen on Hyte’s pentagonal PC case, before. But MSI is bringing the design to a more mainstream form factor by including it in a prebuilt desktop, potentially opening the door for future touchscreen-equipped desktops.

Considering the various locations people place their desktops and the different angles at which they may try to look at this screen, I’m curious about the monitor’s viewing angles and brightness. IPS seems like a good choice since it tends to have strong image quality when viewed from different angles. A video PC Mag shot from the show floor shows images on the monitor appearing visible and lively:

Hands on with MSI’s MEG Vision X AI Desktop: Now, your PC tower’s a monitor, too.

World’s fastest monitor

There’s a competitive air at CES that lends to tech brands trying to one-up each other on spec sheets. Some of the most heated competition concerns monitor refresh rates; for years, we’ve been meeting the new world’s fastest monitor at CES. This year is no different.

The brand behind the monitor is Koorui, a three-year-old Chinese firm whose website currently lists monitors and keyboards. Koorui hasn’t confirmed when it will make its 750 Hz display available, where it will sell it, or what it will cost. That should bring some skepticism about this product actually arriving for purchase in the US. However, Koorui did bring the display to the CES show floor.

The speedy display had a refresh rate test running at CES, and according to several videos we’ve seen from attendees, the monitor appeared to consistently hit the 750 Hz mark.

World’s first 750Hz monitor???

For those keeping track, high-end gaming monitors—namely ones targeting professional gamers—hit 360 Hz in 2020. Koorui’s announcement means max monitor speeds have increased 108.3 percent in four years.

One CES attendee noticed, however, that the monitor wasn’t showing any gameplay. This could be due to the graphical and computing prowess needed to demonstrate the benefits of a 750 Hz monitor. A system capable of 750 frames per second would give people a chance to see if they could detect improved motion resolution but would also be very expensive. It’s also possible that the monitor Koorui had on display wasn’t ready for that level of scrutiny yet.

Like many eSports monitors, the Koorui is 24.5 inches, with a resolution of 1920×1080. Perhaps more interesting than Koorui taking the lead in the perennial race for higher refresh rates is the TN monitor’s claimed color capabilities. TN monitors aren’t as popular as they were years ago, but OEMs still employ them sometimes for speed.

They tend to be less colorful than IPS and VA monitors, though. Most offer sRGB color gamuts instead of covering the larger DCI-P3 color space. Asus’ 540 Hz ROG Swift Pro PG248QP, for example, is a TN monitor claiming 125 percent sRGB coverage. Koorui’s monitor claims to cover 95 percent of DCI-P3, due to the use of a quantum dot film. Again, there’s a lot that prospective shoppers should confirm about this monitor if it becomes available.

For those seeking the fastest monitors with more concrete release plans, several companies announced 600 Hz monitors coming out this year. Acer, for example, has a 600 Hz Nitro XV240 F6 (also a TN monitor) that it plans to release in North America this quarter at a starting price of $600.

Scharon is a Senior Technology Reporter at Ars Technica writing news, reviews, and analysis on consumer gadgets and services. She’s been reporting on technology for over 10 years, with bylines at Tom’s Hardware, Channelnomics, and CRN UK.

The 8 most interesting PC monitors from CES 2025 Read More »

Author name: Beth Washington