News

  1. Out of China: SARS virus’ genome hints at independent evolution

    The newly identified SARS virus is the product of a long and private evolutionary history, clues from its genome suggest.

    By Ben Harder
  2. Materials Science

    Blunt Answer: Cracking the puzzle of elastic solids’ toughness

    Rubbery materials prove tougher than theory predicts because cracks trying to penetrate those stretchy materials grow blunt at their tips.

    By Peter Weiss
  3. Materials Science

    Bone Fix: New material responds to growing tissue

    A new scaffolding material stimulates bone regeneration.

    By Jessica Gorman

  4. Genetic Clue to Aging? Mutation causes early-aging syndrome

    A gene defect that causes accelerated aging may provide insight into normal aging.