Uncategorized

  1. Archaeology

    Ancient Central Americans built a massive fish-trapping system

    Earthen channels directed fish into ponds that formed seasonally, providing a dietary bounty for Maya civilizations starting around 4,000 years ago.

    By Bruce Bower
  2. Climate

    Satellite space junk might wreak havoc on the stratosphere

    Hundreds of defunct satellites plunge toward Earth every year. Scientists are studying how the chemical stew left in their wake impacts the atmosphere.

    By Carolyn Gramling
  3. Health & Medicine

    Scientists identify a long-sought by-product of some drinking water treatments

    Chlorine-based water treatments create many by-products, but one has been elusive. Its identification sets the stage for studying its health effects.

    By Sid Perkins
  4. Animals

    For adult chimps, playing may be more important than previously thought

    A multiyear study of dozens of wild, adult chimps suggests that play helps reduce tension and boost cooperation among individuals.