This Day in History: 1858-04-23

Max Planck, Nobel-prize winning physicist who originated quantum theory, was born this day in 1858. The theory is a way to reach a mathematical description of the relationship between energy and matter. Planck also made many other contributions that advanced scientific understanding of atomic and subatomic processes. His contemporary and fellow faculty member at Berlin University, Albert Einstein, often worked with — and played music with — Max Planck.