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Ever since the Japanese physicist Ukichiro Nakaya produced his seminal catalog of snowflake shapes 77 years ago, researchers have sought to understand the interplay of factors that lead to different shapes. Finally, answers are emerging.

Ever since the Japanese physicist Ukichiro Nakaya produced his seminal catalog of snowflake shapes 77 years ago, researchers have sought to understand the interplay of factors that lead to different shapes. Finally, answers are emerging. 

https://www.quantamagazine.org/toward-a-grand-unified-theory-of-snowflakes-20191219/