Not many know 12,900 years ago a comet fragment swarm made extinct fifty percent of all the mammals over one-hundred pounds in North and South America. The Clovis Culture vanished and massive floods wiped away early civilization.
Real Climate Change
Why we need Planetary Defense from Impacts
Links
Space Force
https://www.spaceforce.mil/About-Us/About-Space-Force/Comet Research Group
Comets, Diamonds, & Mammoths
Black Mat Layer 12,900 years ago
Cosmic Tusk Summit
Tusk Party