Uncategorized

  1. Paleontology

    Fossils of early salamanders found

    A recent discovery of fossilized salamanders pushes back a milestone in amphibian evolution by more than 100 million years.

    By Sid Perkins

  2. Sperm show age

    The quality of a man's sperm declines as he gets older.

    By John Travis

  3. Sleep debt exacts deceptive cost

    Moderate but sustained sleep deficits undermine alertness and other mental faculties to a potentially dangerous extent, although people who experience this level of sleep loss usually don't feel particularly drowsy.

    By Bruce Bower
  4. Health & Medicine

    Passive smoking may foster kids’ cavities

    Young children exposed to tobacco smoke face a greatly elevated risk of developing cavities in their baby teeth.