> The reason there were so many bison in the US when the settlers arrived is that the native Americans had already hunted the rest of the megafauna to extinctio

> The reason there were so many bison in the US when the settlers arrived is that the native Americans had already hunted the rest of the megafauna to extinction. do you have a good source that details the evidence of this? and what megafauna were killed off? i tried searching and from what i found, it isn't anywhere as close to clear cut as you state it. i even saw an article debunking the "overkill hypothesis" which claimed some scientists did some dating studies and showed that in a region of north america the large animals died off before native americans arrived. of course that could be false, but it just doesn't seem so clear as you state it.