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  1. Anthropology

    Ancient climate shifts may have sparked human ingenuity and networking

    Stone tools signal rise of social networking by 320,000 years ago in East Africa, researchers argue.

    By Bruce Bower
  2. Physics

    STEVE the aurora makes its debut in mauve

    A newly discovered type of aurora is a visible version of usually invisible charged particles drifting in the upper atmosphere.

    By Emily Conover
  3. Plants

    Liverwort reproductive organ inspires pipette design

    A new pipette is inspired by a plant’s female reproductive structure.

    By Laurel Hamers
  4. Planetary Science

    Dwarf planet Ceres may store underground brine that still gushes up today

    Waterlogged minerals and changing ice add to evidence that Ceres is geologically active.