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  1. Genetics

    Domestication did horses no genetic favors

    Horses bear the cost of domestication in the form of harmful genetic variants, a study of equine DNA finds.

    By Tina Hesman Saey
  2. Planetary Science

    Year in review: Tectonics active on Europa

    Jupiter’s frozen moon Europa has a shifting exterior analogous to Earth’s plate tectonics.

    By Thomas Sumner
  3. Earth

    Year in review: Life thrives under Antarctica

    Thousands of microbe species thrive in Lake Whillans deep beneath the West Antarctic ice sheet.

    By Thomas Sumner
  4. Anthropology

    Year in review: Asian cave art got an early start

    Stone Age cave painting began at about the same time in Southeast Asia as in Europe, challenging the idea that Western Europeans cornered the market on creativity 40,000 years ago.