Supermassive black hum: Scientists discover gravitational wave background that permeates universe The source could be merging black holes — or something more 'mind-bending' ...

The black holes involved in Thursday's discovery are much larger – up to billions of times the mass of our Sun – and produce ultra-low frequency "background" gravitational waves that can take ...

Astronomers have been able to “hear” the celestial hum of powerful gravitational waves, created by collisions between black holes, echoing across the universe for the first time.

As black holes collide across the universe, these waves all hum and resonate together in the background. Gravitational waves travel at the speed of light, but the astronomers realized a single ...