News

  1. Astronomy

    Crust on a star

    By analyzing X rays generated by the rumblings of a neutron star 40,000 light-years from Earth, astronomers have estimated the thickness of the dense star's crust.

    By Ron Cowen

  2. Blood Sucker: Like the adult heart, the developing heart takes advantage of suction

    The embryonic heart works more like the adult heart than scientists had long assumed.

    By Christen Brownlee
  3. Health & Medicine

    Defending against a Deadly Foe: Vaccine forestalls fearsome virus

    A single injection of an experimental vaccine prevents infection by the lethal Marburg virus in monkeys.

    By Nathan Seppa
  4. Astronomy

    Big Breakup: That’s the way the comet crumbles

    Scores of telescopes are watching the continuing breakup of a comet as it nears the sun.