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Interesting. There have no doubt been many more, but this one is confirmed.
https://www.msn.com/en-us/news/technology/the-pentagon-just-confirmed-the-first-ever-interstellar-visitor-to-earth/ar-AAW98NJ?ocid=msedgntp&cvid=b8ba4cd1a2244eefa01f5c86f3d25598
How did they confirm this? They apparently don't have a piece of the visitor.
Some kind of chemical analysis?
Speed & trajectory?
