The world's smallest crocodiles use a sneak attack to hunt bats in hellish underground caves filled with poop, a new video reveals. The footage of the never-before-seen behavior was captured for the upcoming National Geographic series "Africa: Earth's Wild Home" and offers a rare glimpse into the lives of Gabon's mysterious cave-dwelling dwarf crocodiles. Dwarf crocodiles (Osteolaemus tetraspis), which grow to only around 5 feet (1.5 meters) long, live across West and Central Africa and are typically found in forests, rivers, swamps and similar surface habitats. However, the cave population filmed in the new series is unique. Discovered in 2008, these subterranean explorers spend their days ...