How many of you over here are familiar with the twin paradox? I am personally quite fascinated with this phenomenon predicted by General Relativity. In a nut shell, since your relative time slows down at speeds close to the speed of light, it implies that if, say, your twin brother were to go into such a space craft, go away for 40 or so years, he would have only aged by about 10 years or so upon return because time would have slowed down greatly for him. You, on the other hand, would have aged 40 or more years. This would then make twins who were born on the same date that aren't the same age, hence the twin paradox. There are many speculations as to what one could do with such a thing, and I've read somewhere that Kip Thorne even proposed this as a solution to time travel (putting one end of the wormhole on a separate space ship and accelerate it to near light speeds). Likewise, it would make a vacation to some distant part of the galaxy impractical, since thousands of years would have gone by upon return. So, what are your speculations, interests, or thoughts on the matter?