This document discusses snowflakes and their connection to nanoscience. It explains that snowflakes form when it is cold and cloudy as water vapor condenses and freezes into ice crystals. The hexagonal shape of snowflakes comes from the molecular structure of ice. While snowflakes may look different, their exact shape depends on temperature and humidity levels during formation. The document explores how snowflakes self-assemble through natural processes like molecules and cells, providing an example of nanotechnology occurring in nature.