One promising puzzle piece for confirming dark matter now seems unlikely fit
Monday, November 28, 2011 - 17:31
in Astronomy & Space
In 2008, the Italian satellite PAMELA detected a curious excess of antimatter positrons -- a startling discovery that could have been a sign of the existence of dark matter. With assistance from the Earth's magnetic field, the Fermi Gamma-ray Telescope confirms a cosmic excess of antimatter positrons, but not the spike expected if evidence of dark matter.