[brytlea]

I have to admit that the defintion of species seems to have become muddied now that we can look at DNA.
susie

[Sofa King]

The thing about the definition of a specie is that there is no natural criteria that it can be based off of. When species A evolves into species B, you wind up with a gradual transition where each generation along the way has more genetic difference between individual organisms of the same generation than those organisms have between themselves and their parents or offspring. What possible criteria could you use to draw a line between the two and say "this is species A and this is species B"? The first member of species B would be infinitely more like the last member of A than it would the last member of B.

When creationists are asking to see speciation happen over the course of a generation or two, they're actually asking for something that goes *against* the theory of evolution.