[enzo@af]

Exactly. So, if you put a million large cats and a million small cats on the planet, the large cats will have a better chance at surviving than the little cats. Thus, over time the frequency of large cats will rise (from 50% to say, 80%). Right there, an evolutionary force.

Now, this might seem like it means nothing other than the obvious...exactly. When applied to larger settings, multiple traits, varied ecosystems, things change. Large cats appear in one system, but small cats appear in another. The large cats for some reason have blue eyes (maybe it makes them less visible to predators in that area), and in the other location small cats get green eyes. Enough of these differences and you have two breeds of cats. Over time, with continued seperation, mutations and natural selection will cause the two breeds no to be able to produce viable offspring....SPECIATION! It's a miracle! No, it's just logic, chance, and millions of years.