News

  1. Physics

    Single top quark detected

    Scientists observe elusive single top quark, usually found in pairs.

    By Solmaz Barazesh
  2. Health & Medicine

    Early intellectual gap found for kids of older fathers

    A reanalysis of data from more than 33,000 U.S. children finds that those with older fathers fared somewhat poorer on intelligence tests than those with younger fathers, regardless of mothers’ ages.

    By Bruce Bower
  3. Health & Medicine

    President reverses federal ban on stem cell funding

    President Barack Obama signed an executive order lifting a ban on federal funding for research that uses embryonic stem cells.

    By Janet Raloff
  4. Space

    Frozen cosmic fingerprints

    Researchers claim to find evidence of 11th century supernovas and the solar cycle in an ice core.