News

  1. Health & Medicine

    Blood vessels (sans blood) shape organs

    Even before they begin to carry blood, blood vessels provide signals that help spark the development of organs such as the liver.

    By John Travis
  2. Animals

    Meerkat pups grow fatter with extra adults

    Meerkat pups growing up in large, cooperative groups are heftier because there are more adults to entreat for food.

    By Susan Milius
  3. Anthropology

    Isotopes reveal sources of ancient timbers

    Isotopic analysis of architectural timbers from ancient dwellings in the U.S. Southwest has shown from which distant forests the massive logs came.

    By Sid Perkins
  4. Astronomy

    Probe’s comet encounter yields close-ups

    A crippled NASA probe successfully navigated close enough to Comet Borrelly to capture and beam home black-and-white and infared images of its nucleus and new data about ions and other particles that radiate from it.