News

  1. Paleontology

    These mammal ancestors birthed live young far earlier than thought

    Growth rings on a fossil bone suggest at least one mammal ancestor gave birth to live young rather than laying eggs 236 million years ago.

    By Carolyn Gramling
  2. Health & Medicine

    Estrogen therapy is linked to fewer signs of Alzheimer’s in the brain

    Estrogen-only menopause therapy in older women was linked to less Alzheimer’s brain pathology at autopsy but may not prevent the disease.

    By Nora Bradford
  3. Space

    A vest tested on the Artemis I mission blocked some radiation exposure

    A 26-kilogram plastic garment, flown on a model human torso on the uncrewed Artemis I mission, may one day protect astronauts from solar storms.