Don Wildman: Like the ancient Romans and Egyptians, the Maya civilization was one of the most advanced in the world, with an empire that stretched throughout Central America. They dominated this region for close to 4,000 years before they mysteriously vanished. Today their great empire has been swallowed up by the jungle, but clues behind their incredible rise and devastating collapse can still be found underground. From the depths of a cave where bloody human sacrifices were desperate pleas to angry gods to evidence of savage warfare inside tombs of a royal temple, the subterranean tunnels where high priests spoke with gods of the underworld. The Maya calendar predicts apocalypse in the year 2012, for them it happened a thousand years too early, but with 2012 almost upon us the clues they left behind may hold answers to the end of their world, and possibly to ours.