Einstein's wildest prediction from 100 years ago is turning out to be true

When Albert Einstein predicted that two colliding black holes could cause gravitational waves in the fabric of space, he was sure to mention he never thought we'd confirm the elusive waves exist. But he was wrong: we did, in 1974, and now scientists are using a giant laser-based experiment called LIGO to try and observe gravitational waves.

Produced by Rob LudacerOriginal Reporting by Dave Mosher
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