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  1. Life

    This ‘junk’ gene may be important in embryo development

    Mice — and maybe humans — can’t get past the two-cell stage of development without a particular type of jumping gene.

    By Tina Hesman Saey
  2. Astronomy

    Astronomers snap the first baby pictures of a planet

    New telescope images give the clearest view of an exoplanet embryo yet.

    By Maria Temming
  3. Archaeology

    Mongolians practiced horse dentistry as early as 3,200 years ago

    Horse dentistry got an early start among Bronze Age Mongolian herders.

    By Bruce Bower
  4. Genetics

    Koala genome may contain clues for helping the species survive

    The complete genetic instruction book of a koala may explain why the cuddly-looking cuties are such picky eaters, among other secrets.