From dust to dendrites, snowflakes take a chilling journey on their way to the ground
Snowflakes form around tiny dust or pollen particles floating in a cloud.
Water molecules in the cloud vapour condense on the particle and a droplet begins to form.
The droplet freezes to form a hexagonal prism; each face develops a cavity whereby more water molecules collect and freeze to form branches.
Air currents move snowflakes into regions of varying temperature and humidity, carving out the final shape of the snowflake, allowing more branches to sprout off one another.