We have now come to the most controversial extinct animal of all: our own hominid brother, the Neanderthal. Early humans and Neanderthals shared much of the same stomping grounds, and some of our ancestors were so cozy with them that we likely interbred. The reason Neanderthals went extinct between 50,000 and 30,000 years ago is hotly debated, but humans probably had something to do with it, either by edging out the food supply or straight-up warring with them. To bring an intelligent great ape back from the dead would be an enormous achievement, and would have all kinds of consequences. What do you think? Would you want to chat with a Neanderthal?