Question

why do no two snowflakes look alike?

Answer 1

It's just the way they arrange themselves, In the very early stages they are very similar, but once the branches start forming it's completely random, and there are so many ways they can grow is next to impossible to find two similar fakes. So technically, it's not impossible for two flakes to look alike, just finding them is.

Answer 2

Thank you @_KingFwea_