This is Voltaire's philosophical novel about giants from other planets who visit Earth and interact with its inhabitants. This is one of the first Science Fiction novels ever written, similar to The Day the Earth Stood Still or War of the Worlds. To two giant beings, one from Sirius and the other from Saturn, visit Earth and interact with humans. The extraordinary story is a satire on human vanity and the limitations of human knowledge and experience, and it reflects Voltaire's fascination with Newtonian science, planet formation and rational inquiry. The Saturnian and the Sirian find the philosophy of man to be laughable, but marvel and wonder at the genius of the philosophical Moths.