Animal Evolution: The Natural History of Whales with Dr. Jean Potvin Tuesday, March 12 at 3 p.m. Dive into an exploration of animal evolution with Dr. Jean Potvin, a Saint Louis University physicist who will discuss the natural history and evolution of whales and share footage of feeding whales filmed from devices attached to the whales themselves! Ages 12+.Registration required. Call 636-296-2204 to register or register online at jeffcolib.org event calendar. This event is part of JCL's Dive In! Promotion. Check the library's website for more information on events, activities, and chances to win great prizes.