[Hunble]

I have no idea how many transitional species are between a Rat and a Bat, but it would not take many. They are both rodents and very closely related.

I must admit that I have not studied the genealogy of the bat.

However, the Trilobites are a most interesting subset of animals and have a long and well documented history. I learned many things by studying the historical record of the Trilobites.

If you want to see thousands of transition species, study the history of the Trilobites.

[William Terrell]

Between a rat and a bat there is differences in bone density, wing structure and the specialized radar sounding organs. I'm at a lose to conceive of how parts of those structures evolved a mutation at a time.

But how do we get from a trilobite to a hog or an elephant, not to speak of a fly, a cockroach or a centipede.

[Dimensio]

They are both rodents and very closely related.

Bats are not rodents. In fact, evidence suggests that they are more closely related to primates than rodents.