A popular subject in movies and books, time travel has always intrigued mankind. Wether it is zipping through time and space in a blue police box or traveling by way of an elegantly designed victorian style machine we’ve always come up with some fantastic solution to getting from here to there in some way or the other. But is it possible?
Yes and no. Current science allows for several theoretical ways in which we could bridge the seemingly insurmountable gap between now and then. While traveling to the future is certainly more doable (after all, we’re already heading in that direction aren’t we?) by clever use of gravity and velocity, traveling to the past is a different question entirely. The tricky thing is, if time travel was possible shouldn’t we have already met time travelers? Maybe we have! But the very nature of the universe may be such that the whole thing is impossible to prove. What if it’s impossible to change the past and your actions were already part of the future? If you change something in the past, will the whole thing not reset because you’d lose your reason to travel back and thus never go? Getting you stuck in a loop of doing the thing and not doing it? It’s complicated, and nobody has the answer. But still, it would be cool to kill Hitler, wouldn’t it?
So, in essence, traveling back is scary! Traveling forward, however, should be less so. There are several ways to accomplish the feat. Here’s some examples. You could travel at the speed of light away from earth and come back. The time dilation effect theoretically would then ensure that, for example, while only maybe a year has passed for the traveler, many hundreds of years may have passed for those left behind. A second option is building a time capsule. Freeze a person or create a stasis field to allow them to bridge a certain span of time. It can be done, in theory.
What an amazingly dangerous thing it would be if humans got free roam of time and space. We’d have people stepping on ants and shooing off butterflies and thus potentially changing the course of earth history all over the place. (Lets face it, if it exists, you’ll get tourists mucking up the whole thing.) Still, I wonder what marvels the future holds! And if I could I would definitely take a sneak peek!
What about you guys? Backwards or forwards? What would you change or visit. Let me know in the comments below!