The other thread on flashlights and spaceships and General Relativity got me thinking about something. I don’t know, it sounds like a stupid question, but it’s physics, and those question always sound stupid when I ask them.
So nothing can go faster than the speed of light. Why? I mean, I know what happens when you approach the speed of light – time slowing down and all that – but again, WHY does time slow down? Or asked differently, what causes light to travel at the speed of, well, light?