Quote Originally Posted by Mx250z View Post
i was watching science channel.. they were designing this space ship that travels so fast that when you leave earth and go into space. your traveling so fast that what feels like 5 years in space is like 10 years on earth. so it's sorta like time travel. to the future.?
That is correct, according to Einstein's theory of special relativity. Time is relative, and put simply, as you approach the speed of light time dilates. Astronauts in orbit around the earth experience this effect. Sergei Krikalev has logged the most time in space, and I do believe he therefore also holds the record for being the greatest time traveler.

About 800 days he was in orbit going 17,000 miles an hour. So, he is right now a one forty-eighth of a second younger then he would have been if he had stayed home. So, that means that when he came back to the earth, he found that one forty-eighth of a second to the future of where he expected it to be. So this man has actually time traveled one forty-eighth of a second to the future.