Time-like and light like separations between events make sense, because a particle or a light flash can travel between them. However, how can you have a space-like interval when even light cannot travel such an interval (because its velocity is not greater than c). Obviously the first event cannot cause the second event for a space-like interval. I suppose it boils down to what I understand about WHAT is actually travelling between two events. "Information" is said to travel between these events. So what is this "information" that can travel above the speed of light? Or have I got it all wrong?