For seventy-two seconds in 1977, Ohio's Big Ear radio telescope detected a narrowband signal that rose and fell like a source fixed among the stars. The famous “6EQUJ5” printout became the Wow! signal—but it was never an audio recording, never a decoded message and never proof of aliens.
This forensic investigation follows the original evidence, the failed attempts to hear it again, and a new astrophysical hypothesis based on archived Arecibo observations. Could a magnetar flare make a cold hydrogen cloud imitate a technosignature?
Sources:
Ohio State Big Ear archive: https://www.bigear.org/wowmenu.htm
SETI Institute: https://www.seti.org/research/seti-101/the-wow-signal/
Arecibo Wow! I: https://arxiv.org/abs/2408.08513
Arecibo Wow! II: https://arxiv.org/abs/2508.10657
Some scenes are clearly labelled historical reconstructions or scientific visualizations. Pexels footage is used under the Pexels License.
00:00 The seventy-two-second mystery
00:24 The signal nobody heard
00:54 What 6EQUJ5 really meant
01:44 The missing second beam
02:10 Explanations multiply
03:13 A new clue from Arecibo
04:07 Why “more likely” is not “solved”
04:33 How false positives improve SETI
05:14 The telescope that no longer exists
05:38 What the Wow! signal actually proved
