Roland Piquepaille writes: "Snowflakes have been puzzling mathematicians for about four centuries. Still, scientists have never been able to fully explain snowflake shapes. For example, is this true that their six-pointed structure reflect an underlying crystal structure? Now, two U.S. mathematicians have developed software that simulates 3-D snowflakes. And they discovered that even 'no two snowflakes are truly alike,' they're very similar to each other. In fact, the real mystery is why they are not more different from each other. But read more for additional references and beautiful images of 'snowfakes' as the researchers called them."