truchas wrote:Don't know if this is true or not because it lacks a citation, but this is what Wikipedia says:
"However, Ancient DNA studies have shown that the wild ancestors (Equus ferus ferus) of all modern domestic horses originated on the North American continent."
If you feel inclined, this website is dedicated to the preservation of these animals.
Horses did originate on the North American continent, but were essentially extinct by ~10000 years before present. In fact, there were also elephants on the NA continent till perhaps 5000 years ago.