Special relativity is a theory in physics developed by Albert Einstein in 1905. It describes the behavior of objects moving at speeds approaching the speed of light and is based on two main principles: the laws of physics are the same in all inertial reference frames, and the speed of light in a vacuum is constant for all observers. Special relativity has led to many important and counterintuitive results, such as time dilation, length contraction, and the equivalence of mass and energy (as described by the famous equation E=mc^2).
