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Scott K. Johnson

Reporter

Indexed articles, last 90 days
6
Latest publication
Sep 28, 2026
Outlet visibility, for arstechnica.com
Top 50K sites
Earliest in this view
Jul 31, 2026

Latest articles

  1. Article · Sep 28, 2026 · Scott K. Johnson

    New device captures carbon dioxide by pumping it across a battery (opens the original)

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    Equipment to capture carbon dioxide from ambient air or smokestacks generally works through a sort of reversible filter. Air is passed through granules or a liquid that absorbs the CO2, then that CO2-loaded substance undergoes a process (usually heating) that causes it to let go of all that CO2. The resulting gas can be collected in a separated stream. It’s also possible to do a similar sort of operation on a smaller scale—like inside a battery. A new study from a team led by James Buchen of the

  2. Article · Sep 14, 2026 · Scott K. Johnson

    A new solar cell could generate electricity underwater (opens the original)

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    In one episode of the Hanna-Barbera cartoon Birdman, the eponymous hero struggles to fight the evil Dr. Shark aboard a submarine without solar energy to recharge his powers. So Birdman would surely appreciate the new perovskite solar cells developed by a team led by Simin Ma at Yunnan University, since they are designed to work underwater. Solar cells made from perovskites rather than silicon are always a tale of trade-offs. They can be made cheaply, they can take interesting forms (like thin, f

  3. Article · Sep 8, 2026 · Scott K. Johnson

    Update to Google’s AI weather model improves forecast accuracy (opens the original)

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    Google is one of the major players in AI (meaning machine learning) weather forecast model space. The models it and others generate have their strengths and weaknesses, but the main advantage is that they can have forecast performance similar to traditional models while requiring far less computing horsepower to run. That means they can be run more frequently. Google recently released version 3 of its WeatherNext model, with the biggest change being that it now ingests some satellite weather dat

  4. Article · Aug 20, 2026 · Scott K. Johnson

    SpaceX’s orbital data centers would create a new category of e-waste (opens the original)

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    Elon Musk’s talk about maintaining a million-strong AI data center satellite megaconstellation may not exactly be practical or economical, but it might be unique. It’s about the closest we’ve come to confronting a scheme that would export a considerable amount of valuable materials into space. Humans aren’t doing a great job of material sustainability, but normally we’re talking about stuff escaping a recycling pipeline rather than escaping Earth’s gravitational pull. The commercial space sector

  5. Article · Aug 11, 2026 · Scott K. Johnson

    Tracking extreme heat by the hour makes climate change seem even worse (opens the original)

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    Global warming is leading to more extremely hot weather. There is perhaps no more obvious consequence of climate change. But changing how we analyze this problem can still help scientists think about it in a different way that may yield surprises. Generally, studies on heat extremes work with some combination of daily minimum, maximum, and mean temperatures. Sometimes they focus on multi-day heatwaves using those metrics, since the discomfort and health impacts increase for longer events. There

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