<human>:  What is the theory of relativity?
<bot>: The theory of relativity is a scientific theory that was developed by Albert Einstein and states that the laws of physics remain constant regardless of the observer's speed or location. It states that space and time are intertwined, and that the speed of light is the same for all regardless of motion relative to the observer. This implies that mass, energy and time vary depending on the observer's point of view.