Dangers of Reality Traveling and time travel.

As you are well aware Traveling to other Reality's May be dangerous. For the simple fact that you never know who you might meet or find yourself in a situation that would jeopardize your continued existence. Generally It is nearly impossible to Create a system to allow you to Travel to a Reality of your Choice. Most Fiction that includes Time Travel is also a form of travel to parallel universes and the dangers of Time travel are included in this. If you go back and kill your grandfather so you were never born you won’t disappear like in Back to the Future. You will alter your history but you won’t ever change your own past because you would need to follow the same steps you took to come to the choice of killing your Grandfather and actually complete the Cycle of time. A Successful Change of time is a change unseen or unknown. If you wanted to bring someone back from the dead you would save them from a car accident they would still need to appear as if they died so that the future you would still go back and change the past. IF you keep them alive at that time you would never have gone through the pain and lose and never work to go back into time to change it. Now the Act of Changing time is what creates the ability to go to a reality. When you change the past you Create what's called a paradox Of course a true paradox can’t exist. But you may be able to travel to other realities by changing the past. Now here in lies the danger not only is it dangerous to change time but in even more dangerous if you can never go back to the way things were. The Reality you originally came from will always exist but the ability to go back may disappear without the proper Technology. Now going back in time is nearly impossible but Going to the future is really easy. You can do this if you can travel the speed of light Travel the length of the galaxy and come back and you may be years in the future. This is all based on Einstein's Theory of Relativity. Time is not constant it is relative to your location and the effects Time-Space distortions. The atomic Clocks All across the world know that time is not constant and that certain places on earth are running faster or slower. Have you ever wondered why old clocks tend to have the wrong time. Well sometimes its not cause of the failure of the machine its because the old clock is running slower or faster in that location. Not the clock but time itself. Did you know that people Time Travel all the time. When you get into any moving object the faster you go the Less time will pass for you While everyone outside the car is moving faster. That means that time is Faster outside the car and time inside the moving car is slower. This is only for things in motion. Did you know our galaxy is moving at a high Rate of speed already? The Earth is already time traveling and so is Everything in the galaxy.