A sport once tagged as the domain of adrenaline junkies, cave divers have become an important asset to scientists exploring global climate change, archaeology, water issues and unique biology. Jill Heinerth will share stories from expeditions to faraway caves around the world from Egypt to Antarctica and Bermuda to the Bahamas. She’ll offer a fast-paced multimedia show about tiny venomous creatures and ancient lofty stalagmites that tell the story of earth before man. Family 4+. Registration required.