Pondering an interesting theory on Time Travel. Is it possible? What are the restrictions? If you travel back in time, can you travel back to what you know as the present? The answer is undoubtedly no… Think about it… Lets say that Jack invented Time Travel. so you take his time machine, go back in time and kill Jack before he invents the time machine. Being dead, the time machine is never invented and hence time travel is not possible, so how could you have traveled back in time to kill him? You couldn’t have so since you didn’t go back and kill him, the time machine was invented, and once again you could go back and kill him again…. Pretty mind-boggling isn’t it.