In 1931, the first photoelectric cell commercial installation occurred.
The swinging doors between the kitchen and dining room of Wilcox’s Pier Restaurant in West Haven, Connecticut were operated by a photoelectric cell.
In 1963, Russian cosmonaut Valentina Tereshkova, the first woman in space, returned to Earth.
During the 70.8 hour flight, aboard Vostok 6, she made 48 orbits of Earth. Sally Ride, the first US woman in space, would follow her into space twenty years later.