A mysterious signal has appeared in an extremely sensitive dark matter-hunting experiment. And after more than a year of trying to convince themselves that they were looking at noise, scientists think they might have found something new.
Most of the matter in the universe is undetectable in any way except for the gravity it exerts. While some think this mysterious “dark matter” must be made up of unknown particles, others suggest a familiar particle could be the key.
Scientists using the Hubble Space Telescope have discovered evidence of small clumps of dark matter warping the light from distant quasars.