German-Swiss-US physicist Albert Einstein (1879-1955) with his cousin & second wife Elsa Einstein Lowenthal (1876-1936) arriving in San Diego, Clifornia, on New Year's Eve 1930. His famous mass-energy equation resulted from his 1905 paper on Special Relativity. This, with his 1915 General Theory of Relativity, replaced the previously unshakeable Newtonian world view, rewriting the concepts of gravity, space and time. He won the 1921 Nobel Prize for Physics. Photographed at their summer house in Caputh, Germany, in around 1930.