[Boogieman]

Sure, but the only problem is that they went extinct before any human teeth showed up.

[Bubba Ho-Tep]

I’d take the local Indians at their word that the figures represent mountain lions. It just looks like a four-legged animal.

[Bubba Ho-Tep]

Not true. Evidence has been found of Clovis people butchering horses about 13000 years ago.

[aruanan]

Sure, but the only problem is that they went extinct before any human teeth showed up.

There are petroglyphs and cave paintings of mastodons in the Americas. Humans came into the Americas in the late Pleistocene before the event that knocked out many of 75% of the genera of large mammals in North American and almost 80% South America that have gone extinct over the past 60,000 years. There is no reason to believe all species of the North American Pleistocene horses became extinct before humans showed up here. The genetic evidence is that they could have come over as long ago as 30,000 years. They were around to make pictorial representations of North American and South American megafauna and, apparently, of horses.