The Laser Interferometer Gravitational-wave Observatory (LIGO) is the coolest experiment ever performed.  LIGO can detect ripples in space time billions of light years away, caused by massive objects like black holes merging, as predicted by Einstein's theory of relativity, developed over 100 years ago. The Nobel prize in physics for 2017 was awarded based on this amazing technology. Gravitational wave observatories have opened a new window on the universe. Come with me and share in the awe as we listen to black hole mergers billions of light years away.

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