News

  1. Climate

    Tree rings tell tale of drought in Mongolia over the last 2,000 years

    Semifossilized trees preserved in Mongolia contain a 2,000-year climate record that could help predict future droughts.

    By Dan Garisto
  2. Astronomy

    Astronomers can’t figure out why some black holes got so big so fast

    Early supermassive black holes are challenging astronomers’ ideas about how the behemoths grew so quickly.

    By Lisa Grossman
  3. Anthropology

    Ancient climate shifts may have sparked human ingenuity and networking

    Stone tools signal rise of social networking by 320,000 years ago in East Africa, researchers argue.

    By Bruce Bower
  4. Planetary Science

    Dwarf planet Ceres may store underground brine that still gushes up today

    Waterlogged minerals and changing ice add to evidence that Ceres is geologically active.