The planet Earth, third from the Sun in the Solar System in the Milky Way galaxy, is a world populated by a wide variety ofnative organic lifeforms, including humans, and for some strange reason, it frequently becomes involved in the conflicts of the Transformers. Perhaps too frequently. Whenever someone or something leaves, escapes, or is otherwise ejected from Cybertron, there's a disproportionate chance it will eventually wind up on Earth, as opposed to, say, any of the other planets in the vast universe.