The Hubble Space Telescope has discovered a galaxy in the the Perseus galaxy cluster that is "composed of 99% dark matter," according to NASA's Goddard Space Flight Center. <br /><br />Credit: NASA's Goddard Space Flight Center <br />Paul Morris: Lead Producer<br /><br />Video Credits:<br />A simulation of the formation of dark matter structures from the early universe until today.<br />Ralf Kaehler/SLAC National Accelerator Laboratory, American Museum of Natural History
