You may have heard that every snowflake is unique, but to really get a sense of that you've got to dig down to the microscopic level. That's exactly what the folks over at the Beltsville Agricultural Research Center in Maryland did with a Low Temperature Scanning Electron Microscope (or LT-SEM). The result? A look at the structure of snow crystals in all shapes and configurations. Some of them even look like alien architecture from a distant world. Check it out in the gallery below — the shapes just get crazier and crazier. After all, we're all not tired of snow just yet, right?