Ice Age Footprints

Photo © ARTE France / Bella Falk / Passport & Pixels / Courtesy of GBH / NOVA

Photo © ARTE France / Bella Falk / Passport & Pixels / Courtesy of GBH / NOVA

Photo © ARTE France / Bella Falk / Passport & Pixels / Courtesy of GBH / NOVA

Photo © ARTE France / Courtesy of the National Park Service

Photo © ARTE France / Courtesy of the National Park Service

Photo © ARTE France / Courtesy of the National Park Service