1965 - Paul Hermann Müller died.

Ben Mills

Müller was a Swiss chemist who was awarded the 1948 Nobel Prize in Medicine for his discovery that DDT (dichloro-diphenyl-trichloroethane) was a highly effective poison for anthropods. It was used with great effect against mosquitoes and lice for many years until the environmental effects were cumulative and DDT was banned in the United States in 1972.