U.S. Geological Survey Great Lakes Science Center September 19, 2012

Scientists from the Center discuss their research that
takes place on the Great Lakes: deep-water science, invasive species,
coastal ecosystems, restoration ecology, and environmental health. The
Center, headquartered in Ann Arbor, is the only federal agency that has a
large research vessel (70 ft.+) operating on all five of the Great Lakes. For Grade 9 to adult.