The end of the world is here. Again. The latest in a long line of end of the world predictions is upon us, but this one is a little bit different. Reports from around the world show people are taking the Mayan calendar prediction very seriously, and it's making them act crazier than ever. But why? What makes this prediction different from all the others? Laci Green has the lowdown on what's coming or not coming. Only time will tell.