Cynthia Light Brownis the author of "Amazing Kitchen Chemistry Projects You Can Build Yourself," "Discover National Monuments," "Explore Rocks and Minerals!"," ""Geology of the Desert Southwest," and "Geology of the Pacific Northwest." She is a founding partner and vice president of Clover Leaf Environmental Solutions with 21 years of experience as an environmental consultant specializing in pollution prevention, toxicology, and risk assessment. Kathleen Brown is a high school student who competed in the National Geography Challenge. They both live in Pittsburgh, Pennsylvania.