Ants never cease to amaze. They navigate the world with internal pedometers. They can build a life raft in 100 seconds flat. And, further demonstrating the remarkable powers of de-centralized intelligence, they can tunnel into the earth and produce sprawling underground colonies, structures equivalent to humans building the Great Wall of China. This clip comes from the documentary Ants: Nature's Secret Power, which appears below in full. H/T BoingBoing.