"If we look at what makes up the universe, it's a little disturbing," Humboldt State University physicist CD Hoyle told the standing-room-only audience in Arcata. "It turns that most of the universe is dark energy." And we don't know what that is. "And that's a problem." Physics has problems, and nature is hinting at mysteries as big as the universe itself. There are contradictions among major models of nature that are, in Hoyle's opinion, downright embarrassing. Subscribe to the My Favorite