Kenneth Libbrecht is the author of The Snowflake," He is a professor of physics and head of the physics department at Caltech. Dr. Libbrecht has published numerous articles on a range of scientific topics, including the free oscillations of the sun and stars, ultra-cold atomic gases, the detection of gravitational radiation, and the mechanics of crystal growth. He is the author of "The Little Book of Snowflakes" and "Ken Libbrecht's Field Guide to Snowflakes," He lives in Pasadena, CA, with his wife and two children.