A large meteor crashed through the sound barrier above northern Ohio on Tuesday morning, producing a large fireball and what local residents described as an extremely loud "boom."

According to various eyewitness reports, the meteor's bright streak through the morning sky was visible across a wide area. A National Weather Service meteorologist in Pennsylvania, Jared Rackley, captured video of the meteor passing through the atmosphere and creating a large fireball. So far, there have been no reports of impacts on the ground.

The precise location of the fireball was pinpointed by a near-infrared optical detector on a geostationary satellite at 9:01 am ET (13:01 UTC). This "geostationary lightning mapper" revealed that the meteor traversed through the atmosphere in northern Ohio, just west of Cleveland, and over Lake Erie.

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OpenAI cannot escape the doom cloud swirling around its rollout of a text-based "adult mode" in ChatGPT.

Late Sunday, The Wall Street Journal reported that insiders confirmed that OpenAI’s "handpicked council of advisers on well-being and AI" were "freaking out" over the company's plans to move ahead with "adult mode," despite their urgent warnings.

Back in January, council members unanimously warned OpenAI that "AI-powered erotica could foster unhealthy emotional dependence on ChatGPT for users and that minors could find ways to access sex chats," sources told the WSJ. One expert suggested that without major updates to ChatGPT, OpenAI risked creating a "sexy suicide coach" for vulnerable users prone to form intense bonds with their companion bots .

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Porsche provided flights from Albany, New York, to Los Angeles and accommodation so Ars could drive the 911 Cup. Ars does not accept paid editorial content.

Video game launches for new cars are increasingly common these days—Gran Turismo alone has hosted dozens of "Vision" concepts —but Porsche decided to go a little more serious for the digital debut of its latest model. iRacing , the online driving sim that has been punishing people's digital driving indiscretions since 2008, was not only the first place anyone could drive the new 911 Cup, but also serves as a sort of digital feeder series to Porsche's one-make Porsche Carrera Cup.

That sim makes a great venue because the 911 Cup is as hardcore a racer as iRacing is a hardcore racing game. When I was invited to drive that new car for real, I knew exactly where to start.

Making the Cup

While there are faster and more expensive versions of Porsche's 911, the GT3 has long been the ultimate "racer for the road" spec, riddled with track-focused upgrades yet offering just enough creature comforts for daily driving .

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Formula 1 raced in China this past weekend, just a week after the sport kicked off its 2026 season in Australia. Most of the teams had a better handle on the sport's complicated new cars in China, and the more traditional racetrack environment played better to the strengths of their hybrid power units, with enough hard braking zones to recharge batteries without having to sap engine power instead.

We have a better idea of the grid's current pecking order, at least for now. There's some daylight between each of the top three teams and a close battle for midfield honors. Meanwhile, the specter of unreliability is well and truly with us; four cars failed to even take the start, and seven (of 22) were not classified as finishing. For fans of those teams and drivers, it wasn't a great weekend, especially if you woke up at 3 am to watch the race. But F1 put generally on an entertaining show in Shanghai.

That's a lot of fans

The sport has been visiting the city since 2004. The setting is a classic turn-of-the-century facility designed and built by Herman Tilke. It's a captivating-looking place, with a pond-filled paddock, a vast grandstand that spans the start-finish straight, and a layout that resembles the character for "shang," which creates some rather tricky corners, like the spiraling decreasing radii of turns 1 and 2.

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Apple announced the AirPods Max 2 today, following up the original AirPods Max , which were announced in December 2020. The new model brings improved active noise cancellation (ANC) and other new features via an updated H2 chip.

The AirPods Max 2 are available in the same five colorways as their predecessor. Credit: Apple

Apple introduced the H2 with the AirPods Pro (2nd Generation) , which came out in September 2022. The original AirPods Max released in 2021 with an H1, meaning the new over-ear headphones should be more in line with Apple’s AirPods series in terms of features.

Apple claims that the new chip, combined with new computational audio algorithms, makes ANC up to 1.5 times “more effective” on the AirPods Max 2 compared to the original AirPods Max.

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It flew for only two seconds, but its impact is still felt a century later.

Robert Goddard's first liquid-fueled rocket, which lifted off from a snowy field on March 16, 1926, has been written about extensively. Earlier solid-fueled rockets existed, but liquid-fueled rockets promised the sustainability and control needed to send spacecraft and humans into Earth orbit and beyond.

"The rocket's reach was short, but it marked the moment that humanity entered a new era," said Kevin Schindler, author of "Robert Goddard's Massachusetts," speaking at the site of that first launch as part of a centennial commemoration held Saturday in Auburn (March 14). "It proved that liquid fuel could lift a craft skyward—the essential breakthrough that would one day carry humans to the moon."

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Republican lawmakers in multiple states and Congress are advancing proposals to shield polluters from climate accountability and prevent any type of liability for climate change harms—even as these harms and their associated costs continue to mount.

It’s the latest in a counter-offensive that has unfolded on multiple fronts , from the halls of Congress and the White House to courts and state attorneys general offices across the country.

Dozens of local communities, states, and individuals are suing major oil and gas companies and their trade associations over rising climate costs and for allegedly lying to consumers about climate change risks and solutions. At the same time, some states are enacting or considering laws modeled after the federal Superfund program that would impose retroactive liability on large fossil fuel producers and levy a one-time charge on them to help fund climate adaptation and resiliency measures.

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Scientists have discovered that male fireflies in a South Carolina swamp follow local interaction rules to synchronize their flashing mating displays. The research is being presented at a meeting of the American Physical Society in Denver. ( A preprint is also available on the biorxiv.) Such work could one day lead to insights into how the body's cells sync to its internal circadian rhythm, or how neurons fire together in the brain, as well as the design of drone swarms communicating through synchronized flashes.

As previously reported , research into swarming and flocking was largely relegated to observational biologists for decades. But in the 1980s, a computer graphics specialist named Craig Reynolds developed the so-called “boids” program , an agent-based computational model that has dominated collective behavior studies ever since. In such a model, each individual unit in a swarm is a dot moving in a straight line at a constant speed. By introducing a few simple rules regarding interactions between dots, a flocking pattern will emerge once the dots get dense enough. Another set of rules will produce a swarming pattern, and so forth.

Fire ants provide a textbook example of this kind of collective behavior. A few ants spaced well apart behave like individual ants. But pack enough of them closely together, and they behave more like a single unit, exhibiting both solid and liquid properties. You can pour them from a teapot like ants, or they can link together to build towers or floating rafts—a handy survival skill when, say, a hurricane floods Houston. They also excel at regulating their own traffic flow. You almost never see an ant traffic jam.

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Robert Goddard, a Massachusetts-born physicist, launched the world's first liquid-fueled rocket on this date 100 years ago.

It was not an overly impressive flight. The rocket, fueled by gasoline and liquid oxygen, rose just 41 feet into the air, and the flight lasted 2.5 seconds before it struck ice and snow.

Nevertheless, this rocket, named "Nell," represented a historic achievement that would help launch the modern age of spaceflight. Three decades later, the first objects would begin to ride liquid-fueled rockets into space, followed shortly by humans. A little more than 40 years would pass before humans walked on the Moon.

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