Uncategorized

  1. Life

    These bacteria may egg on colon cancer

    Streptococcus gallolyticus may goad colon cancer growth.

    By Tina Hesman Saey
  2. Animals

    Ravens pass tests of planning ahead in unnatural tasks

    Clever birds may have evolved their own broad powers of apelike thinking about the future.

    By Susan Milius
  3. Neuroscience

    Brain activity helps build an alpha male

    In mice, nerve cells in the prefrontal cortex influence whether an individual is dominant or submissive.

    By Laurel Hamers
  4. Climate

    Rising temperatures may mean fewer passengers on airplane flights

    Global warming could force airplanes to carry a lighter load — and fewer passengers —on each flight.