Our time on Earth is just about up, humans. Please return your rental shoes to the counter and settle up your final bill. You see, chimpanzees are evolving. Rapidly. How can you tell? Well, they're now using spears to hunt, which means they will soon be developing a moral center, and then will inexorably decide they're better than we are, and hunt us down dead.
We will not survive, even with our guns, as we are, as a species, too fat and lazy to keep up with monkeys. And then we start all over again. I, for one, welcome our new overlords, and pledge myself to keep them in bananas for as long as they can handle it.
BBC News: Chimpanzees 'hunt using spears'