Dark Matter Particles May Be Heavyweights After All November 30, 2011 Dark Matter Particles May Be Heavyweights After All By the Editor on November 30, 2011 in Around_the_Web Dark matter is slowly running out of places to hide. Two new looks at the gamma-ray sky suggest that if the mysterious matter is a particle, it is heavier than 40 gigaelectronvolts, about 44 times the mass of a proton. Share this:TwitterFacebookEmailLinkedIn Tags:BIG Questions, Cosmology Share this article: 0