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What Is Down Alternative and Who Should Buy It? Experts Explain (2025)

When shopping for new bedding, you'll undoubtedly run into both natural down and materials described as down alternatives. This prompts a lot of questions. Is down or down alternative better? What are the differences between them? Why is one more expensive than the other? Which is easier to care for? Which is warmer? It can all be very confusing. As evinced in our down comforter buying guide, not to mention other stories in our sleep directory, there are plenty of options for high-quality down

My AI Had Fixed the Code Before I Saw It

Was this newsletter forwarded to you? Sign up to get it in your inbox. Before I opened my laptop, the code had reviewed itself. I launched GitHub expecting to dive into my usual routine—flag poorly named variables, trim excessive tests, and suggest simpler ways to handle errors. Instead, I found a few strong comments from Claude Code , the AI that writes and edits in my terminal: "Changed variable naming to match pattern from PR [pull request] #234, removed excessive test coverage per feedbac

Deeply divided Supreme Court lets NIH grant terminations continue

Shortly after the Trump Administration took office, it started cancelling grants for things it had disagreements with: funding for pandemic preparation, efforts to diversify the scientific workforce, those that targeted minority health issues, and more. These terminations were challenged in court, and a consolidate case was heard in the District of Massachusetts, pitting the government against individual researchers, organizations that represent them, and states that host research institutions.

Tesla Takes So Long to Report Crash Data, Even Trump’s Regulators Are Taking Notice

It turns out it’s actually possible for a corporation to drag its feet for so long that even the Trump administration takes issue with it. The National Highway Traffic Safety Administration announced that it will investigate Tesla’s habit of taking months to submit accident reports that involve the company’s driver-assistance technology, according to a report from Reuters. Just how late is Tesla getting its crash report information to the NHTSA? The agency asks that companies submit reports wit

Tesla faces U.S. auto safety probe over faulty crash reporting

Elon Musk, CEO of SpaceX and Tesla, attends the Viva Technology conference at the Porte de Versailles exhibition center in Paris on June 16, 2023. Elon Musk's Tesla is facing a federal probe by the National Highway Traffic Safety Administration after the U.S. auto safety agency found that the company was not reporting crashes as required. According to documents posted to NHTSA's website on Thursday, the agency's Office of Defects Investigation had "identified numerous incident reports" from Te

The unbearable slowness of AI coding

The Unbearable Slowness of AI Coding 19 Aug, 2025 I’ve been coding entirely with Claude Code for the past two months. At first it was exhilarating. I was speeding through tasks. I was committing like mad. Now, as I’ve built up a fairly substantial app, it’s slowed to a crawl. Ironically, the app I’m building lets me parallelize many instances of Claude Code at once. Often, I’ll have 5 instances running while I’m thinking about new features. The slowness comes in when I actually need to revi

Topics: app claude code coding ll

The Unbearable Slowness of AI Coding

The Unbearable Slowness of AI Coding 19 Aug, 2025 I’ve been coding entirely with Claude Code for the past two months. At first it was exhilarating. I was speeding through tasks. I was committing like mad. Now, as I’ve built up a fairly substantial app, it’s slowed to a crawl. Ironically, the app I’m building lets me parallelize many instances of Claude Code at once. Often, I’ll have 5 instances running while I’m thinking about new features. The slowness comes in when I actually need to revi

Topics: app claude code coding ll

Netflix's New Astrology Hub Has Shows Inspired by Your Sign

Netflix is mixing entertainment and astrological signs with a new themed collection called "Your Zodiac Watchlist." You can scout out your next watch on Netflix using the hub, which provides shows and movies in rows like "Virgos Are Always Hustling" (including titles like Now You See Me and Beef) and "Scorpios Revel in Mystery" (including titles like Wednesday and The Residence). You'll also find the rows "Aries Love Chaos and Competition" (including Squid Game and Love Is Blind) and "Cancers W

Kanye West Said Memecoins ‘Prey On Fans.’ Then He Apparently Launched One

Kanye West, the hip-hop artist who goes by Ye, appears to have launched his own cryptocurrency, YZY, sparking a riot of trading activity. In February, West rejected the idea that he might launch a crypto coin. “I’M NOT DOING A COIN,” he wrote, in a since-deleted post on X. “COINS PREY ON THE FANS WITH HYPE.” He seems to have changed his mind. On Wednesday evening, West’s X account announced the YZY coin in two posts. “The official Yeezy token just dropped,” said West, in a strangely deadpan vi

Plague Case Confirmed Near Lake Tahoe After Likely Flea Bite

A California resident has tested positive for the plague after camping near Lake Tahoe, local health officials confirmed. It’s the latest in a string of positive cases in the western U.S. this year. The infected person was likely bitten by a plague-infected flea in the South Lake Tahoe area, according to local health officials. This is the first local case in the area since 2020. The person is currently recovering and is undergoing medical treatment at home. “Plague is naturally present in man

Google Pixel phones just got a major Bluetooth connectivity upgrade - why 6.0 is such a big deal

Joseph Maldonado/ZDNET ZDNET's key takeaways Pixel 10 is the first US phone lineup with Bluetooth 6. Bluetooth 6 adds upgrades, including precise Channel Sounding. Both devices need Bluetooth 6, so adoption will be slow. Get more in-depth ZDNET tech coverage: Add us as a preferred Google source on Chrome and Chromium browsers. Google's Pixel 10 smartphones debuted with plenty of noteworthy features, including native magnetic wireless charging, an industry-first IP68 dust- and waterproof fo

Nvidia, Bill Gates-backed robotics startup Field AI hits $2 billion valuation after recent raise

Bill Gates-backed Robotics startup Field AI has raised $405 million in two funding rounds, with investments from Nvidia 's venture capital arm and Amazon founder Jeff Bezos' family office. The funding comes during an "aha moment," founder and CEO Ali Agha told CNBC, as software and hardware reach an inflection point. "We are growing," he said. "This funding announcement is to respond to the customer demand." The latest round values the two-year-old startup at $2 billion, according to a person

Discover how developer tools are shifting fast with Lauri Moore and David Cramer at TechCrunch Disrupt 2025

From no-code to AI-assisted dev environments, “vibe coding” is changing how early-stage startups build — and who they need to hire. The once-standard idea of landing a “10x engineer” as your first critical hire is getting a serious reality check at TechCrunch Disrupt 2025, October 27-29 in San Francisco’s Moscone West. Vibe coding: hype or new reality? Join Lauri Moore, partner at Bessemer Venture Partners, and David Cramer, co-founder and chief product officer at Sentry, on the Builder Stage

China's Getting Ready to Land Astronauts on the Moon While NASA Flails Helplessly

Over half a year into Donald Trump's second term, NASA still doesn't have a long-term head. That leadership vacuum comes as the space agency is staring down the barrel of some devastating cuts to its science budget, with the White House betting its future on space exploration alone. The chaos has raised serious questions about NASA's ambitious plans to return astronauts to the surface of the Moon for the first time in over half a century. The dates of its planned Artemis program launches keep

It Looks Like China's Getting Ready to Land Astronauts on the Moon While NASA Flails Helplessly

Over half a year into Donald Trump's second term, NASA still doesn't have a long-term head. That leadership vacuum comes as the space agency is staring down the barrel of some devastating cuts to its science budget, with the White House betting its future on space exploration alone. The chaos has raised serious questions about NASA's ambitious plans to return astronauts to the surface of the Moon for the first time in over half a century. The dates of its planned Artemis program launches keep

Association for the Preservation of Spiritualist and Occult Periodicals

The IAPSOP is a US-based private organization focused on the digital preservation of Spiritualist and occult periodicals published between the Congress of Vienna and the start of the Second World War. Our all-volunteer staff digitizes, indexes and makes available free-of-charge these periodicals, in our archive, for use by students and researchers. We have a standing want list and will respond promptly to inquiries and offers from sellers. We accept contributions of material and labor to furt

Int. Association for the Preservation of Spiritualist and Occult Periodicals

The IAPSOP is a US-based private organization focused on the digital preservation of Spiritualist and occult periodicals published between the Congress of Vienna and the start of the Second World War. Our all-volunteer staff digitizes, indexes and makes available free-of-charge these periodicals, in our archive, for use by students and researchers. We have a standing want list and will respond promptly to inquiries and offers from sellers. We accept contributions of material and labor to furt

The Download: pigeons’ role in developing AI, and Native artists’ tech interpretations

People looking for precursors to artificial intelligence often point to science fiction by authors like Isaac Asimov or thought experiments like the Turing test. But an equally important, if surprising and less appreciated, forerunner is American psychologist B.F. Skinner’s research with pigeons in the middle of the 20th century. Skinner believed that association—learning, through trial and error, to link an action with a punishment or reward—was the building block of every behavior, not just

Ars Technica System Guide: Five sample PC builds, from $500 to $5,000

Sometimes I go longer than I intend without writing an updated version of our PC building guide. And while I could just claim to be too busy to spend hours on Newegg or Amazon or other sites digging through dozens of near-identical parts, the lack of updates usually correlates with "times when building a desktop PC is actually a pain in the ass." Through most of 2025, fluctuating and inflated graphics card pricing and limited availability have once again conspired to make a normally fun hobby a

The Biggest Winners of China’s World Humanoid Robot Games

China just hosted the first-ever World Humanoid Robot Games—basically the Olympics, but for robots. The three-day event kicked off Thursday, August 14, inside Beijing’s 12,000-seat National Speed Skating Oval, a venue originally built for the 2022 Winter Olympics. Over 200 teams from 16 countries including Japan, Brazil, Germany, and the U.S., competed across 26 competitions. The contests ranged from classic track-and-field events and gymnastics to kickboxing, soccer, medicine sorting, and even

Picking a Spot for NASA’s Lunar Nuclear Reactor Is Trickier Than It Sounds

In a bold, strategic move for the U.S., acting NASA Administrator Sean Duffy announced plans on Aug. 5, 2025, to build a nuclear fission reactor for deployment on the lunar surface in 2030. Doing so would allow the United States to gain a foothold on the Moon by the time China plans to land the first taikonaut, what China calls its astronauts, there by 2030. Apart from the geopolitical importance, there are other reasons why this move is critically important. A source of nuclear energy will be

The circular economy could make demolition a thing of the past

Most of us are already quite comfortable recycling our household waste. In Spain, for instance, millions of tonnes of packaging are processed every year, but did you know that buildings and their materials can also be recycled, or that an entire building could be completely dismantled and reassembled? Formula 1, often a laboratory for innovation, offers us a real-world example of this in the form of the Red Bull team’s “pit box”, known as the F1Holzhaus – literally, “the wooden house”. It made

LLMs and coding agents are a security nightmare

Last October, I wrote an essay called “When it comes to security, LLMs are like Swiss cheese — and that’s going to cause huge problems” warning that “The more people use LLMs, the more trouble we are going to be in”. Until last week, when I went to Black Hat Las Vegas, I had no earthly idea how serious the problems were. There, I got to know Nathan Hamiel, a Senior Director of Research at Kudelski Security and the AI, ML, and Data Science track lead for Black Hat, and also sat in on a talk by tw

LLMs and Coding Agents = Security Nightmare

Last October, I wrote an essay called “When it comes to security, LLMs are like Swiss cheese — and that’s going to cause huge problems” warning that “The more people use LLMs, the more trouble we are going to be in”. Until last week, when I went to Black Hat Las Vegas, I had no earthly idea how serious the problems were. There, I got to know Nathan Hamiel, a Senior Director of Research at Kudelski Security and the AI, ML, and Data Science track lead for Black Hat, and also sat in on a talk by tw

Ars Technica System Guide: Four sample PC builds, from $500 to $5,000

Sometimes I go longer than I intend without writing an updated version of our PC building guide. And while I could just claim to be too busy to spend hours on Newegg or Amazon or other sites digging through dozens of near-identical parts, the lack of updates usually correlates with "times when building a desktop PC is actually a pain in the ass." Through most of 2025, fluctuating and inflated graphics card pricing and limited availability have once again conspired to make a normally fun hobby a

We Hit 100% GPU Utilization–and Then Made It 3× Faster by Not Using It

We recently used Qwen3-Embedding-0.6B to embed millions of text documents while sustaining near-100% GPU utilization the whole way. That’s usually the gold standard that machine learning engineers aim for… but here’s the twist: in the time it took to write this blog post, we found a way to make the same workload 3× faster, and it didn’t involve maxing out GPU utilization at all. That story’s for another post, but first, here’s the recipe that got us to near-100%. The workload Here at the Daft

Watch Figure 02 Humanoid Fold Laundry in New AI Demo

When the newest demo of the Figure 02 humanoid robot folding towels dropped, I knew I had to make a video about it. CNET's robot coverage always gets comments from viewers asking if robots could do their laundry. In the demo, Figure 02 folds towels at a rate of approximately 22 seconds per towel. Figure With advancements in AI and robotics, the dream of automated household chores feels closer, but it's not quite here yet. I tested my laundry-folding skills against Figure 02's robot to see just

Roblox cracks down on its user-created content following multiple child safety lawsuits

Following a wave of lawsuits alleging that Roblox doesn't provide a safe environment for its underage users, the gaming platform made a series of sweeping updates to its policies. To address recent concerns, Roblox published a post on its website detailing these major changes, including restricting all unrated experiences, which is what Roblox calls its user-generated games, to the developer or those actively working with them. Roblox said this change will roll out in the coming months, represen

Trump's Anti-Science Agenda Is Massively Hampering His Plans for AI, Experts Warn

President Donald Trump's cost-cutting measures to decrease the federal budget have already been backfiring. Federal workers are being fired and rehired. Elon Musk's so-called Department of Government Efficiency has been deemed an utter failure as well. And now, the United States' lead in AI technologies and Trump's own policy proposal to boost AI are under threat due to Trump's anti-science agenda, The Guardian reports. Last month, the Trump administration released its "AI Action Plan," a poli