Uncategorized

  1. Life

    Tracing human roots

    Using a new method of data analysis, researchers have found that the Americas were peopled in two different migrations.

    By Tia Ghose
  2. Climate

    Already feeling the heat

    Long-delayed U.S. government summary of climate change science sees effects on energy, transportation, farming, and water.

    By Susan Milius
  3. Planetary Science

    Rarin’ to go

    After a day’s delay, the robotic arm on the Mars Phoenix Lander is free of its shackles and is preparing to dig for ice.

    By Ron Cowen
  4. Archaeology

    Domain of the dead

    Researchers say that Stonehenge functioned as the largest cemetery of its time.

    By Bruce Bower
  5. Archaeology

    Footprints in the ash

    Humans may have been walking around what is now central Mexico 40,000 years ago.