Nearly 8,000 years ago, in the wild expanse of what is now southwestern Minnesota, a primal drama of survival unfolded. Early Plains Archaic hunters ambushed a herd of massive, now-extinct bison. Then, in 1988 a Granite Falls man found bones while digging in his pasture. Reporter Jp Lawrence joins host Erica Pearson to share what happened next and explain why archeologists left some of the site undisturbed.