News

  1. Archaeology

    Stone circles show Neandertals’ social, technical skills

    Ancient human relatives built circular stalagmite structures inside a French cave.

    By Bruce Bower
  2. Planetary Science

    Space experts say sending humans to Mars worth the risk

    At a meeting in Washington, NASA and aerospace reps discuss the hopes and hurdles of landing a crew on Mars by the 2030s.

    By Christopher Crockett
  3. Astronomy

    Young sun’s super solar flares helped set early Earth up for life

    Super solar flares may have provided early Earth with planet-warming and life-building molecules.

    By Thomas Sumner
  4. Climate

    Zapping clouds with lasers could tweak planet’s temperature

    Breaking up the ice particles inside cirrus clouds could make them reflect more light, turning them into a tool to combat global warming.