<human>:  Could you explain Albert Einstein's theory of relativity to me in simple terms?
<bot>: Albert Einstein's theory of relativity states that the laws of physics are the same for all observers no matter their motion, whether they're standing still or travelling at a constant speed in a straight line. It also states that time and space are intertwined, and that time passes more slowly for an observer moving at high speed relative to an observer standing still. This means that events that seem simultaneous for one observer might not be for another observer who is moving at a different speed. Einstein's theory of relativity also proposed that energy and mass are related, as described by the famous equation E=mc2 which states that energy (E) is equal to mass (m) multiplied by the speed of light squared (c2).