Uncategorized

  1. Animals

    Altruistic Sperm: Mouse gametes team up to power one winner

    The sperm of wood mice hook together by the thousands to form high-speed teams racing toward an egg, even though only one of the pack will get the prize.

    By Susan Milius
  2. Materials Science

    Healing Wounds: Interactive dressing speeds the process

    A new, easily prepared hydrogel material promotes more rapid wound healing in laboratory animals than do conventional dressings.

    By Jessica Gorman
  3. Animals

    Pesticides Mess with Immunity: Double whammy promotes frog deformities

    Agricultural pollutants may conspire with parasites to cause the epidemic of limb deformity that's sweeping through North America's frog populations.

    By John Pickrell
  4. Anthropology

    Evolution’s Surprise: Fossil find uproots our early ancestors

    Researchers announced the discovery of a nearly complete fossil skull, along with jaw fragments and isolated teeth, from the earliest known member of the human evolutionary family, which lived in central Africa between 7 million and 6 million years ago.