Science fiction that veers into the realm of the impossible, is really not science fiction anymore but should probably be categorized as fantasy. For example: time travel. Travelling forward in time is certainly not impossible; we do it every day. Even jumping forward in time is not impossible. Einstein’s rules say that if you can go fast enough, you will move through time faster then a person you left behind. You are not really moving faster in time. The rate of time for you stays the same. But you are moving faster relative to the person who is not moving Actually no one is ever not moving. If you are on the Earth, the Earth is rotating. It is also going around the sun, which is moving through the galaxy etc. How fast are we moving? Well that is all relative to the observer, who is also going to be moving. The universe itself is expanding so there is no place you can be that is a fixed point that is not moving. When we talk about speed, we are usually talking about a speed r...