Eupterus;2671604; said:OK, these horses were not native. Thing is there were horses native to the US before that were wiped out. Way I see it people re-introduced horses.
there were not horses in north america, unless youre talking about 52-45 million years ago.
heres a fairly adequate representation of the evolution of horses. http://chem.tufts.edu/science/evolution/HorseEvolution.htm
the things that were here were NOT horses. to say that Mesohippus was a horse is the same as saying that T-Rexes are emus