Special Relativity
Special Relativity is a fundamental theory in physics that describes the relationship between space and time in the presence of gravity. It was developed by Albert Einstein in the early 20th century and is based on the principle that the laws of physics are the same for all observers, regardless of their relative motion. Special Relativity predicts that time can dilate, lengths can contract, and mass can increase as an object approaches the speed of light. It also introduces the concept of spacetime, which combines the three dimensions of space with the one dimension of time into a four-dimensional continuum.