All the jungle animals are busy except for Sloth who loves to sleep. When they ask him why he is so lazy, he helps them learn that everyone does something best.

The inspiration for Darwin's theory of evolution, the Galápagos Islands are a living laboratory, a geological conveyor belt that has given birth to and seen the death of many species of plants and animals.

Tours the park, documenting the struggle for survival of Yellowstone's animals through three consecutive seasons.