Black and white photographic image of Albert Einstein's face on a black background.
Albert Einstein (14 March 1879 – 18 April 1955) was a German-born theoretical physicist who developed the general theory of relativity and the mass–energy equivalence formula E = mc2, which has been dubbed "the world's most famous equation". His great achievements have made the word "Einstein" synonymous with "genius". Einstein won the Nobel Prize in Physics and was named Man of the Century by Time magazine but he actually did not do very well in school, once failing his university entrance exam; and had a very poor memory. Two of Einstein's least favorite things were haircuts and socks, while his two favorite things were sailing and his violin, which he named Lina.