I was thinking that faster than light travel would create a time travel effect, as you would effectively leave the state before you went in, and therefore travel back in time. Also - why can't a massive object travel at the speed of light. Yeah, ok infinite mass and everything, but couldn't that be used along with a strong gravitational pull to propel the object at super fast speeds? Why is the speed of light considered the fastest thing there is? why can't something go faster?