In a recent Scientific American (July, 2009) “Ask the Experts” column, evolutionist S. Jay Olshansky explains why humans have not evolved eyes in the back of the head. Olshansky makes the argument that (i) natural selection is limited to those designs that just happen to arise and (ii) what happens to arise is not driven by need. In other words, we don’t have eyes in the back of the head not because they wouldn’t be useful, but because early versions never happened to arise there in the first place. Read moreWhy Eyes Did Not Evolve in the Back of the Head
In a recent Scientific American (July, 2009) “Ask the Experts” column, evolutionist S. Jay Olshansky explains why humans have not evolved eyes in the back of the head. Olshansky makes the argument that (i) natural selection is limited to those designs that just happen to arise and (ii) what happens to arise is not driven by need. In other words, we don’t have eyes in the back of the head not because they wouldn’t be useful, but because early versions never happened to arise there in the first place. Read more