I don't want to get into a huge discussion, as my brains mainly thinking about cannibalism (obviously I'm not actually thinking about that lots, I just mean thats my current hypothetical discussion topic).
Here comes the question: How did bats evolve? Hannah was given a leaflet thing with that very question. Bats are mammals so evolved from another mammal. Most people ("evolutionists") think it was something like the shrew.
For us to believe in evolution (which I mostly do) we then have to accept that:
- There was some creature between a bat and a shrew (or similar) that existed long enough to give enough offspring to be the father of all bats (possible, 1 mutation could produce offspring in an isolated place where they multiplied)
- The in-between creature (randomly) mutated longer and lighter fingers (I can see how this could mutate a bit, but not enough for a bat to emerge without creating a really unfit creature, the fingers would not be strong enough to dig, not light enough to fly). Update: Tom's commented again saying a gradual process would work, like with gliding squirrels. The problem I have with bats though is that when a ground-dwelling, digging animal starts mutating wings, the hands will be less fit at digging and not suitable fit to start gliding. I don't think it could be a mutation over millions of years. Maybe nuclear radiation or something mutated a few creatures lots and they got lucky.
- There are no intermediate fossils between species around today (acceptable, I haven't done sufficient digging myself). Update: Tom's commented again! He says the creationist argument of the eye not being able to evolve (e.g. 1/2 an eye wont work) is poop. I think it's poop too. Tom also says not having fossils isn't really a problem. I'm not so sure. As there's lots of fossils, by chance there should be fossils of inter-special creatures. I don't think there are any. If there were then everyone would know about it. Let me know if I'm wrong.
Update: Mike's said "evolution is a fact (probably)". Facts and theories aren't opposite things, they're different categories. Evolution is a theory based on facts (and I guess some assumptions too). Becky says "appreciate them for really cute furry flying machines". I do. Becky also seems to like simplicity (maybe that was a bit rude. Sorry :-).