News

  1. Health & Medicine

    White dental fillings may impair kids’ behavior

    Effects seen only for fillings that used bis-GMA, a resin derived from bisphenol A.

    By Janet Raloff
  2. Life

    Insulin may be Big Antler hormone

    Extra sensitivity to the hormone in certain developing tissues might give animals their oversized weapons and ornaments.

    By Susan Milius
  3. Life

    Skinny searchers keep fat ants full

    By controlling movement out of an ant nest, researchers discover that ants weigh tubbiness in deciding who hunts for food.

    By Meghan Rosen
  4. Humans

    Early Americans took two tool tracks

    Creators of separate spearhead styles colonized North America more than 13,000 years ago.