Dr. Marco Cavaglià, Dr. Katherine Dooley and fellow scientists with LIGO detected gravitational waves from black holes.
On September 14, 2015 at 03:50:45 a.m. CST the two detectors of the Laser Interferometer Gravitational-Wave Observatory simultaneously observed a transient gravitational-wave signal. The signal matches the prediction of general relativity for the coalescence of two black holes with the mass of about 30 Suns into a single black hole at a distance of over one billion light years from Earth. This is the first direct detection of gravitational waves and the first observation of a binary black hole merger.
https://youtube.com/watch?v=-lKUYbhk5_4
UM’s LIGO Team announces the first detection of gravitational waves