News

  1. Humans

    Machu Picchu’s far-flung residents

    A new chemical analysis of skeletons at the Inca site of Machu Picchu strengthens the idea that the royal estate was maintained by retainers who had been uprooted from homes throughout the empire.

    By Bruce Bower
  2. Planetary Science

    Water’s role in Martian chemistry becoming clearer

    As mission nears end, Phoenix Mars Lander finds strong evidence for minerals similar to those formed on Earth by liquid water.

    By Ron Cowen
  3. Space

    Hubble suddenly quiet

    Updated September 30: After the orbiting observatory suddenly stopped transmitting data, NASA announced planned repair mission will be delayed at least until early next year

    By Ron Cowen
  4. Paleontology

    Forget bird-brained

    Scientists have uncovered a new dinosaur that breathed like a bird.