Evolution is driven by random mutations and natural selection. Mutations add variety to a species, and natural selection takes that variety, picks the best and gets rid of the rest, to adapt the species to its environment. We cannot predict where mutations strike, but if we know what they can potentially affect, and we know a species' environment, then we can attempt to predict where natural selection will go, and how a species might evolve.We know how the human species evolved over many millions of years, and that it evolved in an environment very different from where we are now. We live in urban areas, our ancestors did not. Medicine gives us a longer and healthier life than we had in our past. We are adapted to one environment, and we now have to adapt to a new one. Where will evolution take us over the next million years?