I was watching Planet Earth II, the gorgeously shot nature series from the BBC, and the opening segment was about spider monkeys, with their long prehensile tails. It made me think that my book Prehension would be a best seller in the spider monkey community. Finally someone appreciates the prehensile among us! But humans seem reluctant to acknowledge the centrality of human prehensility to their world domination. Yes, we got it from them.