Actual physical anthropological evidence of alternative migration theories to the New World! I'm a little miffed that this wasn't being investigated (and protected) more aggressively. It's a big deal.
How and when humans arrived in the New World is my personal favorite Big Question.
Our government... teaches the whole people by its example. If the government becomes the lawbreaker, it breeds contempt for law; it invites every man to become a law unto himself; it invites anarchy. Louis D. Brandeis