Excess of gamma rays at Milky Way’s center may indicate universe’s missing mass
For years, most claims that scientists had found evidence of dark matter, the ghostly material believed to account for more than 80 percent of the universe’s mass, have seemed to dissolve into thin air. But a new claim of dark matter detection may have more than a dollop of cosmic credibility, scientists say.
Physicists Dan Hooper of the Fermi National Accelerator Laboratory in Batavia, Ill., and the University of Chicago and Lisa Goodenough of New York University base their findings, posted October 15 at arXiv.org, on an unexplained excess of energetic gamma rays emitted from the core of the galaxy. The gamma rays wer