The vast herds of bison is an interesting example. I read in some book on pre-Columbian history or other that the prairie that existed in North America when Eu

The vast herds of bison is an interesting example. I read in some book on pre-Columbian history or other that the prairie that existed in North America when Europeans first showed up was a product of human activity. It seems that folks living in the Great Plains started burning down forests to create more grazing land for bison, in order to have larger bison herds for hunting. re: antelope, I thought they were browsers and not grazers.