News in Brief

  1. Astronomy

    The solar system has a tail

    Clover-shaped clumps of charged particles extend billions of kilometers in our wake.

    By Andrew Grant
  2. Astronomy

    Clouds may keep exoplanets cool

    Even when close to their stars, other worlds could harbor liquid water.

    By Erin Wayman
  3. Space

    Distant radio-wave pulses spotted

    Signals could help astronomers understand universe's mass

    By Jessica Shugart
  4. Life

    Deadly flu virus flourishes in lung cells

    H7N9 influenza's clinging ability in humans and birds raises concerns about increased transmission between species.

    By Tina Hesman Saey
  5. Animals

    Hawkmoths squeak their genitals at threatening bats

    Sounds of an approaching predator inspire ultrasonic rasping in insect prey.