I've seen the idea batted around that the hybridization of neanderthals and cromagnons set off something of an explosion in evolutionary terms. Art and technolo

I've seen the idea batted around that the hybridization of neanderthals and cromagnons set off something of an explosion in evolutionary terms. Art and technology only started getting anywhere in the areas where they had contact some 50,000 years ago. Modern humans are apparently something like 4% neanderthal.