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Gravitational waves are the
first direct evidence that black holes are real
first direct evidence that black holes are real
Full Transcript
00:00:01.000 --> 00:00:04.264
Gravitational waves are the
first direct evidence that
00:00:04.439 --> 00:00:06.658
black holes are real.
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Movie Summary
"Cosmos: A Spacetime Odyssey" returns for a second season. Ann Druyan, original creative collaborator to Carl Sagan, serves as executive producer.