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  1. Climate

    How powdered rock could help slow climate change

    A method called enhanced rock weathering shows promise at capturing carbon dioxide from the air. But verifying the carbon removal is a challenge.

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  2. AI is coming to medicine, but it’s got a lot to learn

    Editor in chief Nancy Shute discusses the present and future of using artificial intelligence technology in medicine.

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  3. Readers discuss dark energy, Ötzi’s tattoos and sneaky plant invasions

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  4. Agriculture

    50 years ago, scientists ID’d a threat to California wine country

    Fifty years after scientists identified the cause of Pierce's disease, which damages vineyards, there still isn't a cure.