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We summarize the week's scientific breakthroughs every Thursday.

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  1. Physics

    Here’s the science behind nuclear weapons testing

    Nuclear weapons haven’t been tested in the United States since 1992. Find out why, and what could happen if the hiatus ends.

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  2. Science & Society

    These scientific discoveries brought us joy in 2025

    Amidst a tough year for science, glimmers of joy burst through in revelations from the silly to the sublime.

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  3. Earth

    Some of 2025’s scientific discoveries broke records

    Longest lightning, the first AI-generated genomes and biggest black hole smashup were among this year’s top science superlatives.

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  4. Animals

    Science taught us a few new tricks about our pets in 2025

    Are we reading our dog’s moods right? Does TV really comfort them when we’re away? These pet stories were catnip to us this year.

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  5. Animals

    These are our favorite animal stories of 2025

    From clever cockatoos to vomiting spiders, these cool critters captivated us this year.

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  6. Health & Medicine

    He made beer that’s also a vaccine. Now controversy is brewing

    An NIH scientist’s maverick approach reveals legal, ethical, moral, scientific and social challenges to developing potentially life-saving vaccines.

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  7. Physics

    How to levitate objects sans magic

    It’s possible to defy gravity using sound waves, magnets or electricity, but today’s methods can’t hoist heavy items high in the sky.

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  8. Climate

    Here are 3 big ideas to combat climate change, with or without COP

    As action from the U.N.’s huge COP30 international meeting falls short, smaller groups are banding together to find ways to fight climate change.

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  9. Life

    Rats are snatching bats out of the air and eating them

    The grisly infrared camera footage records a never-before-seen hunting tactic. It may have implications for bat conservation.

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