News

  1. Genetics

    Chimp and human lineages may have split twice as long ago as thought

    New estimates of chimpanzee mutation rates suggest humans and chimps last shared a common ancestor 13 million years ago.

    By Tina Hesman Saey
  2. Health & Medicine

    Number of skin moles tied to breast cancer risk

    Women who have many moles also have increased disease risk, which may reflect higher estrogen levels.

    By Nathan Seppa
  3. Animals

    Winter road salting reshapes next summer’s butterflies

    Winter road salt treatments boost sodium in roadside plants and alter development for monarch butterflies.

    By Susan Milius
  4. Life

    Oxytocin stimulates repair of old mice’s muscles

    The naturally produced hormone oxytocin, well known for its role in social bonding, may help heal injured muscles in the elderly.