News

  1. Earth

    More Frog Trouble: Herbicides may emasculate wild males

    New studies of male frogs in the wild link trace exposures to common weed killers with partial sex reversal.

    By Janet Raloff
  2. Animals

    Upside Way Down: Video turns fish story on its head

    The first video of whipnose anglerfish reveals them swimming upside down and trolling for prey on the 5,000-meter deep ocean floor.

    By Carol Marzuola
  3. Health & Medicine

    Blood Booster: Growth signal shifts cord stem cells into high gear

    A protein called Delta-1 stimulates stem cells in umbilical cord blood to proliferate in a lab dish, attach well to bone marrow when implanted into mice, and even proceed to the animal's thymus to become T cells.