1610 - Galileo Galilei discovers Callisto, 4th moon of Jupiter.
1930 - The Mickey Mouse comic strip makes its first appearance.
1938 - The Church of England accepts the theory of evolution.
1942 - Henry Ford patents a plastic automobile, which is 30% lighter than a regular car.
1942 - World War II: First use of aircraft ejection seat by a German test pilot in a Heinkel He 280 jet fighter.