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  1. Earth

    Dino-dooming asteroid impact created a chilling sulfur cloud

    The Chicxulub impact spewed more sulfur than previously believed.

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  2. Earth

    Wind may be driving the melting of East Antarctica’s largest glacier

    Winds may be helping warm ocean waters speed up the melting of East Antarctica’s largest glacier.

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  3. Astronomy

    The way hungry young stars suck in food keeps most X-rays in, too

    The columns of plasma that feed growing stars develop an extra layer that keeps X-rays in.

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  4. Animals

    Great praise for categories, and seeing beyond them

    Acting Editor in Chief Elizabeth Quill discusses classification and some of the challenges of putting species in categorical boxes.