Astronomers across the world announced on Thursday that they have found the first evidence of a long-theorised form of gravitational waves that create a "background hum" rumbling throughout the universe.
Scientists Say Universe Has A Background Hum , It Sounds Like ndtv.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from ndtv.com Daily Mail and Mail on Sunday newspapers.
Astronomers have found a background din of exceptionally long-wavelength gravitational waves pervading the cosmos. The cause? Probably supermassive black hole collisions, but more exotic options can’t be ruled out.