Uncategorized

  1. Astronomy

    The ecosystem that controls a galaxy’s future is coming into focus

    An invisible cloak called the circumgalactic medium controls a galaxy’s life and death.

    By Lisa Grossman
  2. Archaeology

    Texas toolmakers add to the debate over who the first Americans were

    Stone toolmakers inhabited Texas more than 16,000 years ago, before Clovis hunters arrived.

    By Bruce Bower
  3. Health & Medicine

    Cancer cells engineered with CRISPR slay their own kin

    Scientists can program the stealth cells to die before creating new tumors.

    By Laurel Hamers
  4. Archaeology

    Stone tools put early hominids in China 2.1 million years ago

    Newly discovered stone tools in China suggest hominids left Africa 250,000 years earlier than we thought.