Originally posted by EternalOptimist
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But Caltech physics professor and snowflake expert Kenneth Libbrecht points out that if you look at any two flakes – even seemingly identical ones – on the atomic level, you’ll find numbers of water molecules and different layouts of those molecules (most water molecules contain an oxygen atom of 16O, but one molecule in every 500 has an 18O). One thing you won’t find? Two snowflakes that are exactly alike.
http://www.mentalfloss.com/blogs/archives/20735
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