In the outer reaches of the solar system, Saturn's moon Titan quietly defies the categories we use to make sense of the cosmos — wider than the planet Mercury, yet less than half its mass, and wrapped in a thick nitrogen atmosphere that no other moon possesses. This paradox of size without weight, of a moon that behaves like a world, invites us to reconsider how we measure significance in space and in life. Titan's methane seas and Earth-like geography remind us that the universe reserves its most unsettling lessons for the places we least expect to find them.