Einstein's gravitational waves found at last

@article{Castelvecchi2016EinsteinsGW,
  title={Einstein's gravitational waves found at last},
  author={Davide Castelvecchi and Alexandra Witze},
  journal={Nature},
  year={2016}
}
LIGO 'hears' space-time ripples produced by black-hole collision. 
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References

ASTROPHYSICAL IMPLICATIONS OF THE BINARY BLACK HOLE MERGER GW150914
The discovery of the gravitational-wave source GW150914 with the Advanced LIGO detectors provides the first observational evidence for the existence of binary black-hole systems that inspiral and