Albert Einstein is known for proposing the theory of general relativity. Introduced in 1915, this groundbreaking theory revolutionized our understanding of gravity, describing it not as a force but as a curvature of spacetime caused by mass. General relativity replaced Newton's law of gravitation and has been confirmed through various experiments and observations, including the bending of light around massive objects and the precise calculation of gravitational waves. Einstein's contributions to physics extended beyond general relativity, influencing many aspects of modern science and reshaping our understanding of the universe.