"No wonder circus animals do what they do: They tortured them. And you know the only ones they can't control? It's the chimpanzees. You can't control them. That's why you never see a gorilla in a movie, because the gorilla may decide there'll be no filming."

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Chimpanzees are an evolutionary hair's-width from us.... Now imagine a species on Earth, or anywhere else, as smart compared with humans as humans are compared with chimpanzees. How much of the universe might they figure out?

— Neil deGrasse Tyson