Uncategorized

  1. Animals

    Deep-sea fishes’ eye chemistry might let them see colors in near darkness

    An unexpected abundance of proteins for catching dim light evolved independently in three groups of weird deep-sea fishes.

    By Susan Milius
  2. Earth

    Only a third of Earth’s longest rivers still run free

    Mapping millions of kilometers of waterways shows that just 37 percent of rivers longer than 1,000 kilometers remain unchained by human activities.

    By Carolyn Gramling
  3. Archaeology

    Ancient South American populations dipped due to an erratic climate

    Scientists link bouts of intense rainfall and drought around 8,600 to 6,000 years ago to declining numbers of South American hunter-gatherers.

    By Bruce Bower
  4. Health & Medicine

    50 years ago, scientists tried to transplant part of a human eye

    In 1969, a doctor tried and failed to restore a 54-year-old man’s vision.