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  1. Planetary Science

    How the laws of physics constrain the size of alien raindrops

    Physics limits the size of raindrops, no matter what they’re made of or what planet they fall on.

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  2. Readers react to million-year-old mammoths, parasitic plants and more

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  3. Enchanted by black holes? We are, too

    Editor in chief Nancy Shute discusses the new image of a black hole's magnetic fields and our coverage of the enchanting beasts over the years.

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  4. Health & Medicine

    People with rare blood clots after a COVID-19 jab share an uncommon immune response

    AstraZeneca’s and J&J’s shots are linked to antibodies that spark clots.