Are all snowflakes different?

I get questions about whether they are all different, I get questions on how/why they change shape.
The short answer to those is, with billions of flakes falling, they can’t ALL be different. And for the second, the colder the air, the more conservative the shape…till you get to “needles” or even “grains”. In any case, here’s an article on snowflake shapes…makes for a brief, interesting read.
http://www.redandblack.com/uganews/science_health/she-blinded-me-with-science-are-snowflakes-really-all-different/article_68c0b4fc-7bec-11e3-a3b4-0019bb30f31a.html#.UtUw97YB-sA.twitter