In Episode 02,"Hidden Waters," travel with scientists to explore springs hidden deep within Grand Canyon. The ecosystems of Grand Canyon's seeps and springs represent some of the most complicated, diverse, productive, provocative, and threatened ecosystems on earth. Grand Canyon In Depth is a new video series that explores the natural and human history of Grand Canyon National Park. Join park rangers, scientists, and historians as they take us beyond the rim of the canyon to discover the diversity of life and the extraordinary beauty of Grand Canyon National Park. Produced by the National Park Service in association with Bristlecone Media and Grand Canyon Association, the official nonprofit partner of Grand Canyon National Park.