Feature

  1. Health & Medicine

    Beyond Blood

    Bloodless MRI seeks a more direct window into the working brain than conventional techniques.

    By Ewen Callaway
  2. Paleontology

    Twice upon a Time

    New fossil finds suggest that the complex features of mammals originated earlier than previously thought and might even have evolved independently in different mammalian lineages.

    By Amy Maxmen
  3. Health & Medicine

    Rotten Remedy

    The gas well-known for its smell of rotten eggs is, recent studies show, a ubiquitous concoction in the body. New studies suggest that the hydrogen sulfide occurring naturally inside us can be both friend and enemy to our health.

    By Jeanne Erdmann
  4. Health & Medicine

    Nurturing Our Microbes

    Nurturing the microbes living in the human body can pay dividends—from shortening the length of colds to fighting obesity and osteoporosis.