Does Dark Matter Exist? Unusual X-Ray Signal Coming From Space Suggests It Does

A group of scientists has detected an unusual X-ray signal coming from space, which they say could be proof of the existence of dark matter, a phenomenon that is believed to be responsible for keeping galaxies intact...
http://www.ibtimes.com/does-dark-matter-exist-unusual-x-ray-signal-coming-space-suggests-it-does-1750886