Even with Gould's Punctuated Equilibrium, figuring there are 8.7 million species on earth now and just for grins, say 7.3 million either are extinct, or didn't make it in the natural selection process, just to make the math easy, then in 4 billion yrs, there would need to be at least 1 successful macro-mutation every 250 yrs.
Meaningless statistics, like sarcasm, is just one more free service I offer.
