News

  1. Science & Society

    Bias in a common health care algorithm disproportionately hurts black patients

    A machine-learning program that uses past medical costs to identify patients for extra care favors white patients over black patients, a study finds.

    By Sujata Gupta
  2. Life

    Remarkable fossils capture mammals’ recovery after the dino-killing asteroid

    A fossil-rich site in Colorado is revealing how mammals rebounded and flourished after an asteroid strike 66 million years ago.

    By John Pickrell
  3. Neuroscience

    Lab-grown organoids are more stressed-out than actual brain cells

    Compared with real brain tissue, organoids show big differences.

    By Laura Sanders
  4. Life

    Piranhas and their plant-eating relatives, pacus, replace rows of teeth all at once

    Piranhas and pacus both lose and replace all teeth on one side of their mouths in one go, which may help to distribute wear and tear.