Are we three years from the end of the world? It's the premise of this fall’s feature film "2012," starring John Cusack. Based on the end of a cycle of an actual ancient Maya calendar that will end on December 21, 2012, NGC asks, "What truths lie behind the fears?" Some enthusiasts fear worldwide changes from what is called a pole shift. We’ll meet one scientist who believes the surface of the Earth experienced a dramatic pole shift in the past, causing the continents to slide across the core of the Earth - and has evidence to prove it. Then, experts examine one of the few remaining original Maya writings in the hope that their hieroglyphs will reveal more clues about the prophecy.