The 72-Second Wow! Signal — One of the Most Puzzling Radio Events Ever Recorded

In 1977, the Big Ear Radio Telescope detected a narrowband signal near the hydrogen line — the famous 6EQUJ5 sequence.
It lasted for exactly 72 seconds as the sky rotated through the beam… and was never seen again.

No satellite fits the profile.
No Earth transmitter matches the band.
No natural explanation is fully confirmed.

Full breakdown, data, and known science (no claims beyond evidence):
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