News

  1. Health & Medicine

    Protective Progeny: Peptide treats and prevents breast cancer

    A synthetic version of a protein present in a woman's body during pregnancy is as effective against breast cancer as the current drug tamoxifen is, according to a study in rodents.

    By Katie Greene
  2. Anthropology

    Gone with the Flow: Ancient Andes canals irrigated farmland

    Excavations in the Andes mountains have unearthed the earliest known irrigation canals in South America.

    By Bruce Bower
  3. Paleontology

    Big bird terrorized South America

    Researchers in Argentina have discovered fossils that may represent the heftiest flightless bird to ever have roamed the planet.

    By Sid Perkins
  4. Paleontology

    Tusk analyses suggest weaning took years

    Changes in the proportions of various chemical isotopes deposited in mammoth tusks as they grew have enabled scientists to estimate how long it took juvenile mammoths to become fully weaned.