1st season: Interesting theories, and yes this makes some sense. I'd like to see more scientific study.
2nd season: Ok, a stretch, then another, then another. "I can't explain it therefore aliens."
3rd season: BIGFOOT IS AN ALIEN!! END OF THE WORLD BEFORE SEASON 4!!
None of this belongs on the history channel.
It's the best sitcom on tv since The Drew Carey Show.