Every video game has a smallest unit. Below it, nothing exists. The renderer simply does not allocate resources to anything finer than its grid. The universe appears to have one too. It is called the Planck length, and it is so small — about 1.6 × 10⁻³⁵ metres — that it has no practical relevance to anything you will ever do. But it has profound theoretical significance: below this scale, the equations of quantum mechanics and general relativity stop producing meaningful answers. Space itself seems to lose definition. Cosmologists treat this as a sign that our current physics is incomplete. They are looking for a deeper theory that explains why the limit exists. There is another way to read it. The universe has a maximum render resolution. We have measured it.