Werner Karl Heisenberg, "I am not certain about that.
Werner Karl Heisenberg (December 5, 1901 – February 1, 1976). Heisenberg was the head of German nuclear energy project, though the nature of this project, and his work in this capacity, has been heavily debated. He is most well-known for discovering one of the central principles of modern physics, the Heisenberg uncertainty principle. In 1937, he married Elisabeth Schumacher with whom he had seven children, including neurobiologist and geneticist Martin Heisenberg.