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Hess (hěs), Walter Rudolf. 1881-1973.
Swiss physiologist. He shared a 1949 Nobel Prize for his research on the brain's control of the body.
American geologist who studied the sea floor and developed the theory of sea-floor spreading in 1960. Hess theorized that sea floors were constantly renewed by the flow of magma from the Earth's mantle through the oceanic rifts. This hypothesis became an important component of the theory of plate tectonics.