News

  1. Life

    Mice lack stem cells in the heart needed for self-repair

    Adult mice hearts have no stem cells, a study finds. The same may be true for people, and that’s not welcome news for those who’ve had a heart attack.

    By Tina Hesman Saey
  2. Astronomy

    Bennu and Ryugu look like spinning tops and scientists want to know why

    The first high-resolution images of Bennu confirm that the asteroid looks very similar to the asteroid Ryugu.

    By Jennifer Leman
  3. Planetary Science

    New Horizons gears up for its close encounter with Ultima Thule

    On January 1, the New Horizons spacecraft will fly by Ultima Thule, the first small Kuiper Belt object ever to get a close visitor.