[The Lithium]

How do you know Evolution has stoped? It just moves so slowly you can't notice it over a life-time, or a couple of hundred years.

But if there was a threat on earth, like in Planet Of The Apes. Apes rules the planet. But Apes can't swim. Humans can. It would take one hell of a long time but in time humans could learn to either stay under water for every long, breath under water or even become water animals, so to speak, to escape these wicked apes. Evolution always finds a way sooner or later. (Well, often later)