00:00In 1977, scientists detected a mysterious radio signal from deep space, and it shocked the entire observatory.
00:09The signal lasted only 72 seconds, then vanished forever.
00:13Despite decades of searching, it has never been detected again.
00:17Was it a message from an alien civilization? Or an unknown natural phenomenon?
00:22Even today, the mystery of the wow signal remains unsolved.
00:26What do you think?
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