People and bison first met 75,000 years ago, and ever since, we've been hunting them, painting them, and walking with them into new lands. Before Europeans arrived in America there were more than 50 million bison here. By 1901, there were just 23 wild bison left. Now, we have some decisions to make. Can we ever have wild free-roaming bison in North America again? Should we? What does the history of bison have to teach us about ourselves?