Symmetry in quantum mechanics

Symmetry in quantum mechanics means that the laws of physics stay the same no matter how you look at it. For example, if you look at something from the top, then the same laws of physics should apply if you look at it from the bottom. This is why things like molecules look the same no matter which direction you look at them from. They all obey the same laws of physics. Symmetry in quantum mechanics helps scientists understand how the universe works.