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The original was posted on /r/todayilearned by /u/HR_99 on 2024-02-26 16:27:23.
Original Title: TIL In 1977, Ohio State University’s SETI (Search for Extraterrestrial intelligence) project received a strong radio signal which appeared to be coming from the constellation Sagittarius and it lasted for 72 seconds. The signal hasn’t been detected since, and it’s still a mystery for the scientists.
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