my laymen's understanding: the weather changed, and with it, forests retreated and plains came about. Neanderthals hunted with handheld spears, ambushing pray i

my laymen's understanding: the weather changed, and with it, forests retreated and plains came about. Neanderthals hunted with handheld spears, ambushing pray in the forest (evidenced by denser bones on one half of the body). Homo sapiens were more adept at plains hunting and throwing spears and one population outgrew the other. Cross breeding eventually eradicated the former as evidenced by the fragments of Neanderthal DNA present in the modern population. I've also heard it said that sapiens were more social, leading to better communication between groups.