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  1. Life

    Cancer cells get help migrating through the body

    Helper cells may give cancer a straight shot to spread through the body.

    By Tina Hesman Saey
  2. Life

    Muscle repair gets spooky help

    Ghost fibers are tunnels that stem cells can use to rebuild muscles fiber by fiber.

    By Tina Hesman Saey
  3. Science & Society

    Top stories of 2015: Pluto, gene editing, a new hominid and more

    Pluto up close, the power gene editor CRISPR, new early human kin and more make Science News' list of the top 25 science stories of 2015.

    By Science News Staff
  4. Planetary Science

    Year in review: Pluto unveiled as a world like no other

    Long out of reach, Pluto came into focus in 2015 with the New Horizons mission.