The simple truth

[The Valkyrie]

Reptiles evolved into birds, really?

Yep, really. In fact, modern birds are basically new dinosaurs. Weird, right?

Based on what?

Well, cladistic similarities, for one. For another, we've got a fairly exhaustive fossil record that even shows transitional forms like the feathered, winged reptile Archeopteryx. You know, evidence.

If so why did some evolve and some didn't?

Because evolution is the result of random genetic mutations over successive generations. Those organisms who were born with mutations that allowed them to be successful- in this case, bird like ones- survived and were able to pass their genes on. Those reptiles who gained different mutations diverged, and so long as they were able to survive, were able to pass on their own reptile genes too.

Remember how I linked you to a university level science source on all this?

Wouldn't of all reptiles of ceased to exist and there be just more birds?

No: as I've said, since the mutations are random- the same ones that keep you from looking exactly the same as your parents, remember- some of them led to the bird branch on the evolutionary tree, and others led to continued, varied reptile branches on the same tree. If you take a left at a fork in the road, does that mean the right side path ceases to exist?

Who decides they stay a lizard and another will be a bird?

It's a randomized process, and as I've told you before, evolution doesn't happen to single organisms. It's not, like, a transformation. Have you been listening at all?

The Word of God attests that in the beginning God created the heavens and the earth. Please explain to me how gasses came from nothingness.

This has nothing to do with evolution, but I'll just say that I don't know. Please explain to me how god came from nothingness, Mr Strawman.

DOn't you know? Absolutely NOTHING can come from nothing . . . except, conveniently, their god.

The mental gymnastics these people play are insane!