News

  1. Astronomy

    Cosmic Remodeling: Superwinds star in early universe

    New measurements reveal that some of the earliest galaxies in the universe produced winds so powerful and persistent that they blew material from one galaxy to another, temporarily separating dark matter from visible matter and profoundly influencing the evolution of future generations of galaxies.

    By Ron Cowen
  2. Paleontology

    Older Ancestors: Primate origins age in new analysis

    A controversial new statistical model concludes that the common ancestor of primates lived 81.5 million years ago, about 16 million years earlier than many paleontologists have estimated.

    By Bruce Bower
  3. Earth

    Feminized Frogs: Herbicide disrupts sexual growth

    At concentrations currently found in water, the widely used weed killer atrazine hormonally strips male frogs of their masculinity and may be partly responsible for global amphibian declines.