News

  1. Earth

    Breakups maintain barchan dune fields, somehow

    Two new theories try to explain how the crescent-shaped sand mountains persist.

    By Erin Wayman
  2. Astronomy

    ‘Space beads’ push back origins of iron working

    Ancient Egyptians used advanced techniques to make beads out of 'metal from the sky.'

    By Bruce Bower
  3. Astronomy

    To determine stars’ physical traits, Kepler sees the light

    Measuring stellar brightness can yield useful estimates of stars' size and evolutionary stage, and help in the hunt for planets.

    By Andrew Grant
  4. Animals

    For sheep horns, bigger is not better

    Trade-offs between studliness and survival keep less endowed sheep in the mix.