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  1. Health & Medicine

    Ancient Estrogen

    A jawless fish ancestor may have revealed the most ancient of hormones and how current hormones evolved from it.

    By Jessa Netting
  2. Astronomy

    Anybody Out There?

    This elaborate Web site brings together a wide variety of resources devoted to the question of life in the universe. Mounted by the European Organization for Nuclear Research (CERN) and other European agencies, the site serves as home base for a competition aimed at eliciting responses from European students to the possibility of extraterrestrial life. […]

    By Science News
  3. Ecosystems

    Fish stocking may transmit toad disease

    Hatchery-raised trout can transfer a deadly fungus to western toads, bolstering the view that fish stocking may play a role in amphibian population declines.