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Kenneth Libbrecht

Kenneth Libbrecht is a professor of physics at Caltech. A North Dakota native, he is the author of Voyageur Press' "The Snowflake," "The Little Book of Snowflakes," and "The Magic of Snowflakes: A Postcard Book." In the fall of 2006, the United States Postal Service introduced four stamps based on Libbrecht's stunning snowflake photography.