I don't think it's very likely, but it might be possible a comet caused the theorized human population bottleneck around 70,000 years ago? https://en.wikipedia

I don't think it's very likely, but it might be possible a comet caused the theorized human population bottleneck around 70,000 years ago? https://en.wikipedia.org/wiki/Toba_catastrophe_theory https://en.wikipedia.org/wiki/Toba_catastrophe_theory