News

  1. Life

    Mammal size maxed out after dinos’ demise

    Opening new ecological niches led to a worldwide boom in size, up to a point.

    By Susan Milius
  2. Health & Medicine

    A few stray hairs

    Brain regions that sense the world can also flick a whisker, research in mice shows, suggesting that the organ’s division of labor is not so clear-cut.

    By Laura Sanders
  3. Earth

    Shuttle images reveal Egypt’s lost great lake

    Radar studies of desert drainage patterns point to ancient oases in the Sahara.

    By Alexandra Witze
  4. Space

    How to use a pulsar to find Starbucks

    Using stars as celestial beacons could be a backup if GPS ground stations failed.