What human beings are able to do–we arrive in new territories and we colonize this entire world. We can live in the tundra, we can live in the Gobi Desert, we can even contrive to live in New York, for heaven’s sake, because what we do is when we arrive somewhere, and let’s say, again, we arrive somewhere much colder, instead of having to wait generations or–while our natural selection favors genes that have got a thicker coat, we see an animal that has already got a thicker coat, we say, we’ll have it off him!