Answer: Voltaire make his aliens in a different size from humans to bring the ideia how small are the humans in the context of the universe. The central idea is to create a sense of vastness and the insignificance of humans beings. Micromegas is a story, but of a particular kind: a "philosophical story." Through it, Voltaire suggests a pointed critique of human thought and behavior. He especially questions the idea of the Great Chain of Being.
