General Relativity is a theory proposed by Albert Einstein in 1915 that describes how gravity affects the fabric of space and time. It suggests that massive objects, like planets and stars, warp the space around them, causing other objects to move along curved paths. This explains why planets orbit the sun and why light bends around massive bodies. Special Relativity, introduced by Einstein in 1905, focuses on the physics of objects moving at constant speeds, particularly at speeds close to that of light. It introduces concepts like time dilation and length contraction, showing that time and space are interconnected and can change depending on the observer's relative motion.