Climb aboard the Cyclops, a microscopic research vessel, and investigate an amazing hidden world on which all living things depend. The Cyclops houses a team of scientists known as the Micronauts and guides them through their discoveries of biological classification, diversity, and ecology. In this episode, the Micronauts come face to face with earthworms. While exploring their burrows, the crew observes the anatomy of earthworms and develops theories about the role earthworms plays in maintaining terrestrial ecosystems. Part 12 of Microscopic Monsters Series.