Widely regarded as one of the greatest scientists of all time, Albert Einstein famously started his career as a patent clerk but would rise to prominence, winning the Nobel Prize for Physics in 1921. Born in Germany, Einstein fled Nazi Germany in the 1930’s and became a U.S. citizen in 1940. He warned the U.S. of

the Nazi’s efforts to develop a nuclear weapon which led to the Manhattan Project and the advent of the nuclear era, a role that troubled him deeply until his death in Princeton, New Jersey in 1955 at the age of 76.