Did Denisovans and Neanderthals interbreed? Weren't they living in the same time period? Didn't they have a lot of geographical crossover? That time chart from the first post doesn't show Denisovans and Neanderthals ever interbreeding after they had separated. Is that true, or was the chart meant to be a simplified model and there was some interbreeding but so little that it's not worth mentioning?