Third gravitational wave detection gives hints on dark matter and black holes
by Hannah Devlin Science correspondent from on (#2RGPR)
Latest observation by Ligo brings scientists closer to goal of using gravitational waves to see ancient events invisible to optical and radio telescopes
Ripples in the fabric of spacetime triggered by the cataclysmic merger of two black holes more than 3bn years ago have been detected by physicists.
The observations mark the third occasion that scientists have spotted gravitational waves - the compression and stretching of space itself that was first predicted by Einstein.
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