Gravitational waves spotted by LIGO reveal two black holes, 140 and 100 times the mass of the sun, merged to become a 225 solar mass behemoth.

A puzzling gravitational wave was detected, and astronomers have determined that it comes from a record-breaking black hole ...

Get all the news you need in your inbox each morning. "A black hole is so concentrated that it causes a little deep puncture in space/time. At the end of the puncture, you have a thing ...