Browns Ferry intake point for the Tennessee RiverAug. 15, 1934: William Beebe and Otis Barton dive more than a half-mile in their bathysphere as the Woods Hole Oceanographic Institute, founded four years earlier, becomes a pioneer in deep-diving.

Aug. 15, 2007: The Tennessee Valley Authority orders an unprecedented shutdown of its reactor at Browns Ferry, Alabama.  In the midst of a brutal heat wave, the Tennessee River’s temperature topped 90 degrees – too high to effectively be used as coolant water for the reactor.

Aug. 15, 2007: John Gofman, a physicist who sounded some of the earliest warnings about the danger of radiation, dies in San Francisco.

Photo: Tennessee Valley Authority

This feature is compiled by Peter Dykstra, an MNN contributor and publisher of Environmental Health News and The Daily Climate.