The conclusion was that the universe is a lot weirder than common sense tells us, although they probably didn’t use that actual word. Objects shrink as they approach the speed of light, time slows down to a crawl, mass becomes infinite … and nothing can go faster than light. Another key idea was that space and time are to some extent interchangeable. The traditional three dimensions of space plus a separate one for time are merged into a single unified spacetime with four dimensions. A point in space becomes an event in spacetime.
