Explore the drowned coastlines of the prehistoric Great Lakes. Dive into sinkholes, underwater springs and other features along shores which were exposed during extreme low water some 10,000 years ago. Winner of three "Communicator" Awards and three "Telly" Awards.
Visit a prehistoric quarry site on Lake Michigan and swim the banks of an ancient, submerged river channel, home to some of Michigan's earliest communities from 8,000 to 10,000 years ago.
Over 7,000 years ago, a spruce and cedar forest flourished in what is now lower Lake Huron. Remnants of this ancient forest remain 40 feet below present lake levels. Rapidly rising waters preserved the trees revealing much about the conditions in which they grew.
Foreign species of animals and plants introduced to the Great Lakes have transformed the ecosystem, mostly to the detriment of native inhabitants. From sea lampreys to zebra mussels, see how the lakes are changing before our eyes