Sean’s mission on Earth is to help humans live forever by eradicating useless states of emotion and instinct. However, confronted with "Earth’s pointless gravity", Sean’s body weakens. He seeks the help of a domesticated horse, who introduces him to poetry. Undaunted, he continues to collect samples from Earth: animals, worms, and the very children who have befriended him.
Sorry, but for now we weren't able to find movies like EarthWorm.