Footsteps into the World Beneath (Archaeology Channel)Six hundred years ago, humans, black bears, and mountain lions were inhabiting a Missouri cave. When the entrance collapsed, everything was trapped inside, creating a time capsule not to be discovered until a small hole in the ceiling exposed the cave in 1985. In this 30-minute documentary by Emmy-winning director Christian Cudnik, rappel 65 feet into the darkness and follow cave archaeologists as they document prehistoric footprints, rock art, torch marks, bear tracks, beds, and much more in this cave north of Springfield, Missouri.