Another clue in the case for dark matter

Another clue in the case for dark matter

The Fermi Gamma-ray Telescope hasn't ruled out earlier findings

By Ron Cowen, 08:34 AM May 2, 2009

DENVER — Using a sensitive detector to survey the abundance of high-energy electrons and positrons in nearby reaches of space, the Fermi Gamma-ray Space Telescope has found new evidence that may hint at the existence of dark matter, the exotic invisible material believed to make up 85 percent of the mass of the universe.

The measurements, reported May 2 at a meeting of the American Physical Society and also online May 4 in Physical Review Letters, bolster the possibility that another orbit...

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