So why don't we take a look at the Columbian Exchange and see if we can't grow our brains as we do a little bit of the giddy up for the look. Let's go get it done. So once upon a time, about 175 million years ago, there existed a continent called Pangaea. And of course over the next 175 million years, that's going to break up into the seven continents that we know today. And really, we're going to have two worlds. We're going to have the New World, the Americas, and then what we're going to call the Old World, Africa, Asia, Europe. And over that 175 million years, they're going to grow up differently, ecologically, evolutionary.