Hear 2 Black Holes Merging in this Unforgettable Sound Clip

A new sound file released today (Feb. 11) reveals the sound of gravitational waves rippling through space-time as two black holes merge, forming one giant black hole. "It's the first time the universe has spoken to us with gravitational waves," David Reitze, a physicist at the California Institute of Technology, said today in a news briefing. To get the unforgettable sound, the researchers working with the Laser Interferometer Gravitational-Wave Observatory (LIGO) scientific collaboration used l