| http://www.w3.org/ns/prov#value | - Libbrecht has studied snow intensively for about 10 years and authored six books on the subject.There are more than 1 trillion potential combinations for the books, Libbrecht says on his Web site, www.snowcrystals.com.Given that dendrites have more than 100 different types of features, the possibilities are astronomical.Thus it is unlikely that any two complex snow crystals, out of all those made
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