Weyl expansion

Weyl expansion is a way of helping us understand how things that look the same can be different on very small scales. Imagine a block of wood, it looks like a solid square with no differences. But if you look at it with a microscope, you can see that it's made up of lots of tiny pieces called molecules, which are arranged in different ways. Weyl expansion explains this on an even smaller scale - it shows how the molecules can move around in space to form different shapes, even though from far away they still look the same.