#2217 - Brian Cox

9577.559 - 9601.709 Brian Cox

So let's say that we wanted to come back here tomorrow. That would be another event. We meet again tomorrow. And you can see how much time has passed between those events. In Einstein's theory, the amount of time that has passed... is the length of the path you take over spacetime between the events. So it's just like saying, in a sense, what's the distance between Austin and Dallas, right?