News

  1. Planetary Science

    In the Zone: Extrasolar planet with the potential for life

    Astronomers this week announced that they had found Earth's closest known analog outside the solar system, an object with an average temperature that may allow water to be liquid on its surface.

    By Ron Cowen
  2. Physics

    Putting Einstein to the test

    A NASA mission has found new evidence for Einstein's theory of gravity, but its final results have been delayed by unexpected problems.

    By Davide Castelvecchi
  3. Physics

    Fermilab could beat CERN to the punch

    A new particle accelerator starting up next year in Switzerland should finally discover the origin of mass, unless an older U.S. machine does it first.