News

  1. Tech

    Light-activated heart cells help guide robotic stingray

    Layers of silicone, gold and genetically engineered rat heart cells make up the body of a new stingray robot that can swim in response to light.

    By Meghan Rosen
  2. Life

    Donor mitochondria could influence metabolism, aging

    Mitochondrial DNA donation could have unexpected long-term health consequences for “three-parent babies.”

    By Amy McDermott
  3. Anthropology

    New dating suggests younger age for Homo naledi

    South African fossil species lived more recently than first thought, study suggests.

    By Bruce Bower
  4. Planetary Science

    New clues in search for Planet Nine

    Lots of unknowns remain as researchers try to pin down where a possible ninth planet might be hiding in the solar system.