Albert Einstein began his career as a patent clerk at the Swiss Patent Office, where he performed his most notable work in 1905, known as the "Annus Mirabilis articles". In that year, he published four groundbreaking papers addressing fundamental questions in physics. These articles dealt with the photoelectric effect, the theory of Brownian motion, the special theory of relativity and the famous equation E=mc², which relates energy and mass --auto --s2

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