Not sure if anyone posted this story yet (sorry if I'm repeating) but I found this interesting. Makes me a little nervous when you continue to see new evidence coming to light about how many times this has happened in Earth's past. Probably more common than we think.
https://www.uc.edu/news/articles/202...-hopewell.html
https://www.uc.edu/news/articles/202...-hopewell.html
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