Uncategorized

  1. Anthropology

    ‘Y guy’ steps into human-evolution debate

    The common ancestor of today's males lived in Africa between 35,000 and 89,000 years ago, according to a contested DNA analysis.

    By Bruce Bower
  2. Physics

    Signs of mass-giving particle get stronger

    The promising search at a collider in Switzerland for the Higgs boson—the crucial and last undetected fundamental particle predicted by the central theory of particle physics—became even more of a cliff-hanger as a new, strong hint of the particle appeared on the eve of the machine's second scheduled demise.

    By Peter Weiss
  3. Health & Medicine

    Killing immune cells thwarts arthritis

    Researchers have successfully treated people with rheumatoid arthritis by temporarily wiping out most of their antibody-producing immune cells.