You're right that this could have been stated better. The impacts themselves are something for geologists and other scientists to discuss. Linking the YDB (quat

You're right that this could have been stated better. The impacts themselves are something for geologists and other scientists to discuss. Linking the YDB (quaternary extinctions, demographic bottlenecks, and possible conflagrations) to those impacts remains a combination of under-discussed and controversial in the archaeological community.