News

  1. Physics

    Birds network too

    Starlings in a flock adjust their trajectories to those of their closest neighbors, which helps the flock stay together when under attack.

    By Davide Castelvecchi

  2. New World Stopover: People may have entered the Americas in stages

    People first reached the edge of the Americas about 40,000 years ago but had to stay put for at least 20,000 years before melting ice sheets allowed them to move south and settle the rest of the continent.

    By Bruce Bower
  3. Earth

    Don’t like it hot

    King penguins don't live on continental Antarctica but even they are vulnerable to warming water.

    By Susan Milius

  4. Swell, a Pain Lesson: Gut microbes needed for immune development

    Intestinal bacteria train the immune system to cause pain and swelling, but that's a good thing.