News

  1. Archaeology

    Human footprints in New Mexico really may be surprisingly ancient, new dating shows

    Two dating methods find that human tracks in White Sands National Park in New Mexico are roughly 22,000 years old, aligning with a previous estimate.

    By McKenzie Prillaman
  2. Health & Medicine

    ‘Dormant’ HIV has ongoing skirmishes with the body’s immune system

    In people on HIV drugs, defective viral bits may still exhaust T cells, possibly making it harder to fight back if people go off the drugs.

    By John Carey
  3. Life

    Hippos might be ferocious fighters, but their big teeth make them terrible chewers

    Among plant eaters, hippos are the worst chewers. Their huge tusks and front teeth keep the jaw from moving side to side to grind food, a study finds.