Incredible close-up views of snowflakes

Electron microscopy at sub-zero temperatures helps scientists at the Beltsville Agricultural Research Center learn more about the structure of snow and how it impacts our ecosystem. This image shows a hexagonal snowflake with beautifully crystalline arms called dendrites. (Photo courtesy of emu.arsusda.gov)

Electron microscopy at sub-zero temperatures helps scientists at the Beltsville Agricultural Research Center learn more about the structure of snow and how it impacts our ecosystem. This image shows a hexagonal snowflake with beautifully crystalline arms called dendrites. (Photo courtesy of emu.arsusda.gov)