A new study has re-examined the famous "Wow!" signal, finding that it likely has an extraterrestrial origin after all, and may have been even more intense than previously believed. The rest of this article is behind a paywall. Please sign in or subscribe to access the full content.

On August 15, 1977, at the Big Ear radio telescope observatory at Ohio State University, a narrowband radio signal was received. A few days later, astronomer Jerry Ehman reviewed the data and noticed the signal sequence, which lasted for a full 72 seconds. In the margin next to the printout, he simply wrote "Wow!" , and thus the puzzling signal had a name that would stick for the next 43 years at least.

The signal has, so far, defied explanation, and that's not for a lack of trying. Researchers argued the ca

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