News

  1. Paleontology

    A large fossil leg bone hints at T. rex’s origins, but scientists disagree

    A new analysis of a large fossil shinbone suggests T. rex ancestors came from North America instead of Asia. Not everyone agrees.

    By Carolyn Gramling
  2. Genetics

    Why African striped mice can be the best of dads — or the worst

    Environmental cues can flip a molecular switch in the brain, turning males from caregivers to killers.

    By Viviane Callier
  3. Health & Medicine

    AI may be giving teens bad nutrition advice

    AI-generated meal plans for fictional teens cut an entire meal’s worth of calories and carbs while overemphasizing protein and fats, a new study reports.