News

  1. Health & Medicine

    Progestin linked to hearing loss in older women

    Elderly women who received progestin as part of hormone replacement therapy have poorer hearing than do women who didn't get progestin.

    By Nathan Seppa
  2. Anthropology

    Neandertal debate goes south

    A controversial report concludes that Neandertals lived on southwestern Europe's Iberian coast until 24,000 years ago, sharing the area for several thousand years with modern humans before dying out.

    By Bruce Bower
  3. Tech

    A thin laser gets thinner

    Researchers have created a microchip laser that fires an extraordinarily thin beam of high-intensity light.

    By Peter Weiss
  4. Physics

    Solid Surprise: High-pressure oxygen takes unpredicted form

    X-ray analysis of oxygen crystals under high pressure indicated that the substance's two-atom molecules aggregate into groups of four, a crystalline structure that has never been seen before and isn't predicted by current quantum theory.