Could a strange X-ray signal coming from the Perseus galaxy cluster be a hint of the elusive dark matter in our Universe? Using archival data from the Chandra X-ray Observatory and the XMM-Newton mission, astronomers found an unidentified X-ray emission line, or a spike of intensity at a very specific wavelength of X-ray light. This … Continue reading "Intriguing X-Ray Signal Might be Dark Matter Candidate"