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On May 30, 2021, I wrote an op-ed in the New York Times titled "I'm a Physicist Who Studies Aliens. U.F.O's Don't Impress Me." I don't get to write titles for the op-ed pieces that I write for the Times — or most other places for that matter — but, as provocative as it was, I think it captured the essence of my point. As a scientist involved in the search for life and "techno-signatures" on exoplanets, I think a lot about what constitutes a good data set for that search. In other words, what kind of data would allow me to make the extraordinary claim that my colleagues and I have detected life and a civilization on another world?

The answer had better be "some really damn good data." By that, I mean we would need to take measurements that gave us strong and unambiguous evidence for the conclusion that a particular signal comes from a technologically advanced civilization. My main point in the op-ed was that no matter how intriguing those navy UFO sightings may be — and they are interesting — they don't provide the extraordinary evidence that we need to conclude that aliens are visiting us. My arguments are in the op-ed if you want to see them. What I want to focus on here is what happened after that argument appeared in the press.

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