Quote:So why would something evolve into something that its predecessor cant mate with?
There is no "why." You have to lose that whole concept of some sort of end purpose of evolution. Evolution happens but there is no "plan" to it. It is a reaction to stresses on a given population and the individuals which adapt best to those stresses survive and breed more than the ones who do not.
I always like this graphic, over-simplified though it may be it shows the point.
![[Image: macroevolution.jpg]](https://images.weserv.nl/?url=1.bp.blogspot.com%2F-HZSOkYQBsAM%2FTdl0ZU70vtI%2FAAAAAAAAAKw%2FKX3P4Yx2wjw%2Fs1600%2Fmacroevolution.jpg)