[RightWingAtheist]

Well, first of all, bats did NOT evolve from rats but from insectivores-and many of these DO have a rudimentary form of ultrasonic detection, and it would make sense that this would be exaptated, and further specialized into the complex system used by bats. What's more, trilobites did not leave any living ancestors, although they are closely related to horseshoe crabs. Go and read The Origin of Species or any other layman's text on evolution out there, and after you do so, you would perfectly understand how the process of evolution by natural selection works.

[William Terrell]

We're talking about transitional forms. You know, all the partial forms that animals have to go through to get to their present forms. It doesn't matter who any one thing evolved into what. Rats and bats were just examples.

for the theory to be coherent, all forms had to evolve from a single one celled animal. That makes for one hell of a lot of transitional forms. If you take just one hundredth of one percent of those transitional forms that just happened to be in the right time and place to be fossilized, you would have a fossil record composed of almost entirely of them.

That's just one tiny flaw in the theory that all creatures physically came from one physical source.