The document provides biographical and scientific details about Albert Einstein. It discusses that he was born in Germany in 1879 and died in 1955, and that he made seminal contributions to 20th century physics through his theories of special and general relativity. It summarizes that the special theory of relativity abandoned the concept of the luminiferous ether and established that the speed of light is constant, and that the general theory of relativity described gravity as a consequence of the curvature of spacetime.