Re: Creationists
It shows that at the very least, there was a common ancestor to all species of bird, that had teeth. Penguins and chicken (without teeth) are separate species of bird.
How many snakes have you seen with limbs?
Your argument boils down to if I haven’t seen it, it still has the possibility of not being true. Perhaps, but evidence shows that evolution is practically a certainty. Im sure there is a minuscule chance that all this evidence is an illusion, but scientists will look to the most likely conclusion, that is that evolution is a certainty. Whether we can see it or not.
Is not the genetic variation we find among dogs an obvious enough indication to attest to the validity of speciation? We as humans do what nature takes Millions of hers to do. And yes dogs are still dogs, but if you know anything of genetics, its that at some point, the dog genome could become so diluted that it would be considered a totally separate species. Why do you ignore the inevitability of genetic variation producing new species?
Genetic drift over a short period time produces small variations. Those small variations over long periods constitute huge changes to produce speciation.