What did Wilson Bentley see when he put a snowflake under a microscope?
Snowflakes are shape-shifters, changing with temperature, moisture
Snow Crystals: A Natural Blend of Science and Art
No snowflakes are the same. These stunning close-up photos are proof. - The Washington Post
Picture This: Snowflakes Up Close
Snowflake Chemistry - Common Questions
Myth buster: No two snowflakes are alike? Very likely, but it's hard to prove
Desert Snow Photography
TIME for Kids
Why are all snowflakes unique? - BBC Bitesize
Just how big can a snowflake get? It depends on what you mean by 'snowflake' - OPB
Snowflakes – News, Research and Analysis – The Conversation – page 1