One early result of the ongoing Dark Energy Survey is the previously untold story revealed by old, giant RR Lyrae pulsating stars, which tell scientists about the region of space beyond the edge of our Milky Way. In this area nearly devoid of stars–the motion of the RR Lyrae stars hints at the presence of an enormous halo of invisible dark matter, which may provide clues to how our galaxy evolved over the last 12 billion years. One of the Biggest Mysteries in Science Dark matter, one of the enduring mysteries in science, is “dark” in the sense that it doesn’t emit radiation or hardly interact with anything except via its gravitational attraction. Dark matter may be responsible for some of the observed gravitational waves signals, and seeded supermassive black holes found in the center of the Milky Way and other galaxies, according to a recent study by the Kavli Institute for the Physics and Mathematics of the Universe.