[quote="MikeEddinger"]Nick... any good sources to explain why time slows down for the traveler near the speed of light? I think it has to do with refernece frames, but this one has always perplexed me. How is it that my body would age more slowly because I am on a rocket traveling near the speed of light? How can I be gone 20 years, and my body only age 20 years, while people on earth aged 60? Getting down to the most fundamental level, why have my cellular processes (relative to the person on earth) slowed? I have never been able to get a grasp on this one. Being a Meyers-Briggs ENTP, I always need to find an intuitive hook... that's tough with relativity.[/quote]Look up "time dialation".