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albert einstein (march 14, 1879 to april 18, 1955) was a german mathematician and physicist who developed the special and general theories of relativity. in 1921, he won the nobel prize for physics for his explanation of the photoelectric effect. in his later years, einstein focused on unified albert einstein was born in ulm, in the kingdom of württemberg in the german empire, on 14 march 1879. his parents were hermann einstein, a salesman and engineer, and pauline koch.(albert einstein)