Quote:
Originally posted by DonovanPhillips
And all of those are still... dogs.
We still can't successfully breed a dog and a bird. Or a sheep and a farm boy. 
|
the only limiting factor in achieving any of those things, is time.
the two completely different dogs pictured are labeled that by us. I doubt an alien visitor would identify them as the same.
at a certain point, animals that came from the same genetic line become so different from eahother that they cannot produce offspring and/or the offspring are infertile.
ex. horses and donkeys are currently at that stage.