"The first direct detection of gravitational waves is聽now widely expected to be announced on 11 February聽by the Advanced Laser Interferometer Gravitational-Wave Observatory (LIGO). Using LIGO's twin giant detectors 鈥� one in Livingston, Louisiana, and the other in Hanford, Washington 鈥� researchers are said to have measured ripples in space-time produced by a collision between two black holes." ()
