<human>:  Explain the theory of relativity in layman's terms.
<bot>: The theory of relativity is the idea that the laws of physics are the same for all observers, no matter how fast they are moving. This means that space and time can be linked together and can bend, stretch, and warp when powered by something like a massive object or a lot of energy. In layman's terms, it's like an elastic band that stretches and contracts depending on how much energy is applied, and this means that things that appear to be two separate points in space-time can be connected. This theory is the basis of many important ideas in physics today, including black holes, gravity, and the Big Bang.