News

  1. Humans

    Stone Age paint shop unearthed

    The discovery of tools for making a substance possibly used in body decoration suggests humans could invent and plan by 100,000 years ago.

    By Bruce Bower
  2. Humans

    Columbus’ arrival linked to carbon dioxide drop

    The depopulation of the Americas due to introduced European diseases may have spurred Europe's Little Ice Age.

    By Devin Powell
  3. Health & Medicine

    Vaccine makes headway against trachoma

    An experimental immunization might someday aid public health efforts to counter a blinding disease.

    By Nathan Seppa
  4. Chemistry

    Cloud seeding by trees could alter precipitation, climate

    Some tree pollens shed molecules that can affect precipitation.