Before Renee Robbins became an artist, she wanted to be a marine biologist. So when she was commissioned to paint the viaduct at DuSable Lake Shore Drive and Fullerton Avenue, she called experts at the Shedd Aquarium for insight on native Lake Michigan flora and fauna, and invasive critters, too. The result is a massive spread in Lincoln Park that celebrates Lake Michigan’s natural history and intersects with her fantastical imagination. Muralist Renee Robbins paints over so