Don't forget to stock up on Plutonium. If they are out at that website, just head down to your local corner drug store. http://www.smart-elements.com/Pu
Not unless you have a Delorean, Flux capacitor and Mr Fusion Superluminal communication. ... Faster-than-light communication is, by Einstein's theory of relativity, equivalent to time travel. According to Einstein's theory of special relativity, what we measure as the speed of light in a vacuum (or near vacuum) is actually the fundamental physical constant c.
Simplified terms, if we can travel faster than the speed of light, we can return before we left. Thus time travel...
My thought is, as previously mentioned, time travel does not mean time-space travel. The meaning of time could be inferior than the meaning of time-space. Or time does not exist, while time-space does exist. Without space, merely time could not be useful/meaningful enough. Because of time-space, people cannot change our history due to time travel possibility/reality, nor time-space travel. Just 2 cents.