Ultraviolet light, which some scientists say may be the culprit behind
the Great Lake’s epidemic of mutated frogs, is now part of an
investigation into a smaller but equally important part of the
environmental web. Scientists in Duluth are looking into the viruses
that infect bacteria in the Great Lakes, and how increasing amounts of
U-V light might affect that relationship. The Great Lakes Radio
Consortium’s Stephanie Hemphill reports: