Moogega Cooper Sometimes there are mismatches that occur, and these mutations are sometimes harmful but sometimes it could be a good thing.
Phil Plait Sometimes a random change might make you process food better, might make your eyesight a little bit better, make you a slightly better hunter. It might make you a little bit taller so that you can see above the grass a little bit better. Those are advantageous changes, and they’re random, they don’t happen very often, but they do happen, and that has led basically to the way we are now.