-Albert Einstein (14 March 1879-18 April 1955) was a German-born theoretical physicist.He developed the general theory of relativity,one of the two pillars of modern physics.While best known for his mass-energy quivalence formula E=mc2 (Energy equals mass times the speed of light square d.C comes from the Latin word Celeritas meaning 'Speed'.which has been dubbed "the world's most famous equation"), ▪Albert Einstein (14 March 1879 – 18 April 1955) was a German-born theoretical physicist. He developed the general theory of relativity, one of the two pillars of modern physics. While best known for his mass–energy quivalence formula E = mc2 (Energy equals mass times the speed of light square d. C comes from the Latin word Celeritas meaning 'Speed'. which has been dubbed “the world‘s most famous equation”)