News

  1. Paleontology

    Mosasaurs were born at sea, not in safe harbors

    Newly discovered fossils of prehistoric aquatic reptiles known as mosasaurs suggest that the creatures gave birth in midocean rather than in near-shore sanctuaries as previously suspected.

    By Sid Perkins
  2. Paleontology

    Stegosaur tails packed a punch

    A mathematical analysis of a fossil stegosaur's bones leaves little doubt that the creature's spike-studded tail was an effective defense against predators.

    By Sid Perkins
  3. Chemistry

    Dipping deeper into acid

    New experiments reveal how a molecule of acid dissolves in water.

    By Jessica Gorman
  4. Astronomy

    News flash: Earth still has only one moon

    An object discovered orbiting Earth in early September isn't a moon but something much more mundane—an upper stage of a rocket that was used in the Apollo 12 mission to the moon.