When were hunter gatherers around in america? why and when(a date or range would be great) did they settle down?
No specific date can be given because it depended upon the tribe and the area in which they lived.
http://en.wikipedia.org/wiki/Hunter-gatherer#History
http://www.archaeology.org/9909/abstracts/hunter.html
http://thepaleodiet.blogspot.com/2010/05/ishi-americas-last-known-hunter.html