News

  1. Astronomy

    Planetary System in the Making? Stellar eclipse hints at planet-forming debris

    Astronomers reported the first evidence that a young star is periodically eclipsed by a stream of debris, possibly an orbiting belt of asteroids held in place by a massive, unseen planet.

    By Ron Cowen
  2. Chemistry

    Molecule Sorting: Antibody membrane lends a hand

    A new membrane may make it easier to separate mixtures of drug molecules that exist in mirror-image versions into their two components.

    By Jessica Gorman
  3. Health & Medicine

    Enough Isn’t Enough: An epidemic of vitamin D deficiency

    Many U.S. women of childbearing age, particularly those of African descent, lack sufficient vitamin D even though they consume the recommended amount.