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For Douglas Meffert, those attempting to harness the water power of the Mississippi River aren't just scientists and engineers; they're visionaries who could transform the way power grids operate in the Southeast, and perhaps other areas of the United States. Meffert, a professor of bioenvironmental research at Tulane University, said that with his work, he's carrying on the mission of the late professor William Mouton, a revered New Orleans structural engineer, to end the southeastern United States' reliance on fossil-fuel energy from the Gulf of Mexico.

Strong winds and ocean currents forced 61-year-old Nyad to end marathon swim, but experts say aging athletes