If you know where to look, you’ll find the most surprising slices of nature thriving amidst the urban jungle of America’s largest cities. The One Earth Festival will screen several episodes of WTTW’s 16-episode digital series Urban Nature, in which University of Chicago evolutionary biologist Marcus Kronforst leads audiences on a tour of overlooked ecosys­tems in Chicago, New York, and San Francisco. He’ll hop on a bike, grab a kayak, or even take the subway, to seek out the unlikely habitats that are hidden among the skyscrapers. And he’ll discover how these havens are essential to the health of our cities — and the future of our planet. The series creator, Emmy-award winning producer Dan Protess, joins Kronforst for an audience Q&A following the screening.