WARNING! ACTUAL SCIENTIFIC DATA AHEAD!!!
It's been hypothesized that over time, organisms will become less and less diverse and different. The reason: since the strongest survive and go on to reproduce (and the weaker and lesser die without procreating). Have you ever notice that biologically, asian people just HAPPEN TO look the most similar to each other, with similar faces, hair, and body structure?
By the way, that's not racist, since everything I said is fact.
Suck on that.