Uncategorized

  1. Ecosystems

    Bring in the replacements

    Missing links in ecosystems disrupted by extinctions could be restored by introducing species that perform the same function, new field experiments suggest.

    By Sid Perkins
  2. Health & Medicine

    Leaving a mark

    Child abuse may leave chemical marks on the brains of people who later kill themselves.

    By Tina Hesman Saey
  3. Life

    Brittle arms lose muscle

    In lab simulations of future ocean conditions, brittle stars grow extra-calcified but puny arms.

    By Susan Milius
  4. Health & Medicine

    Stub it out

    Quitting cigarettes shows health benefits even decades after the last puff.

    By Nathan Seppa
  5. Humans

    Teeth chronicle infant diet

    Chemical analyses of teeth, including fossilized ones, may provide clues that tell anthropologists the age at which a child was weaned.