News

  1. Physics

    Counting cracks in glass gives speed of projectile

    There is a simple relationship between an object's velocity and the number of spokes it leaves in a dinged windshield or fractured windowpane.

    By Andrew Grant
  2. Life

    Genetic fossils betray hepatitis B’s ancient roots

    Modern bird genomes reveal evidence that virus is at least 82 million years old.

    By Tina Hesman Saey
  3. Life

    Bees need honey’s natural pharmaceuticals

    Ingredients trigger insects' genes for detoxification and immune defenses against bacteria.

    By Susan Milius
  4. Health & Medicine

    Brain measurements predict math progress with tutoring

    The size and connections of a brain structure associated with memory formation predicted learning ability in 8- and 9-year-old children.