News

  1. Health & Medicine

    An experimental oral vaccine may prevent invasive bacterial diarrhea

    Shigella causes about 450,000 U.S. infections each year. An experimental oral vaccine protected adults in a small human trial.

    By Sahas Mehra
  2. Artificial Intelligence

    AI ‘ghosts’ can comfort mourners — even when the bots get the facts wrong

    A small study suggests emotional fit, not perfect accuracy, may make chatbot versions of dead loved ones feel real.

    By Kathryn Hulick
  3. Anthropology

    In painted caves, ancient human DNA clings to the walls

    Scientists recovered ancient human DNA from cave walls for the first time. Refined, the method could help link prehistoric paintings to their makers.

    By Libby Riddle
  4. Health & Medicine

    Inside the fight against the parasite Cyclospora

    Parasite-induced cases of explosive diarrhea are sweeping the United States.