News

  1. Physics

    Physicists dream up ‘spacetime quasicrystals’ that could underpin the universe

    Quasicrystals are orderly structures that never repeat. Scientists just showed they can exist in space and time.

    By Emily Conover
  2. Animals

    Some snakes lack the ‘hunger hormone.’ Experts are hungry to know why

    The complex biology of ghrelin, the hunger hormone, has researchers wondering how its absence helps snakes last a long time with no food, if at all.

    By Andrea Lius
  3. Artificial Intelligence

    Real-world medical questions stump AI chatbots

    Subtle shifts in how users described symptoms to AI chatbots led to dramatically different, sometimes dangerous medical advice.

    By Tina Hesman Saey
  4. Oceans

    Evolution didn’t wait long after the dinosaurs died

    New plankton arrived just a few millennia — maybe even decades — after the Chicxulub asteroid, forcing a rethink of evolution's catastrophe response speed.