Bison skull pile - photo

[WmRMeyers]

Actually, Native Americans, before gaining access to repeating rifles, would drive entire herds of Bison over cliffs, killing massive quantities at one time, which was far more efficient for them than hunting with bow & arrow and knife.

I don't know if those folks count as American Indians. Some of those mass buffalo kill sites have Clovis points embedded in some of the buffalo bones. Those are 10-13,000 years old. Paleo-Indians they were called, and I don't know that any of their descendants are still around. Never mind that. There's apparently a Clovis burial that does link them to modern American Indians: https://en.wikipedia.org/wiki/Clovis_culture It's been a little while since I last took a class or read a book on the subject.