News

  1. Health & Medicine

    Cigarettes and lead linked to attention disorder

    Nearly half a million cases of attention-deficit hyperactivity disorder among U.S. children are related to exposures to lead or their mothers' smoking while pregnant.

    By Ben Harder
  2. Astronomy

    Oversize supernova

    Researchers have found a supernova so luminous that it must have been produced by a much heavier star than the standard theory allows.

    By Ron Cowen
  3. Health & Medicine

    Bad Alzheimer’s proteins sow disorder in the brain

    Alzheimer's disease may start with a single abnormal protein that spoils other proteins nearby.

    By Christen Brownlee
  4. Earth

    Reading the tale of an ancient river

    Ocean-floor sediment near England holds material deposited during the last ice age by what was then Europe's largest river system.