Why do snowflakes crystallise into symmetrical hexagons?

Wilson Bentley was the first photographer of snowflakes which are symmetrical because they reflect the internal structure of water molecules as they crystallise

The photos above are from about 1902.

Apart from children learning the fundamentals of maths during Key Stage One and Key Stage Two, it is important to ignite interest in the child – e.g. that maths is everywhere in the natural world and not only in workbooks.

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