Hi, I noticed this topic already being discussed but didn't want to hijack the thread with a different question. I don't know if this has been asked before but if it has I couldn't find it. I was watching something recently about quantum physics and entanglement and it mentioned something about how teleportation (beaming from one place to another instantly) is something that could be possible, at least in theory. So it got me thinking... Imagine two planets separated by some cosmically large distance. There are a set of twins who are both on Planet A when a space ship passes by at some relatively fast speed heading towards Planet B. One of the twins beams aboard the space ship and heads off towards planet B. At the point when the space ship passes Planet B (In the travelling twins frame) the twin beams onto a second space ship heading in the opposite direction back towards Planet A. When the space ship passes Planet A the travelling twin beams back down to be with his twin brother. As the travelling twin has not gone through acceleration (at least not as I understand it) will he still have aged less than his brother? Or does the process of beaming instantly (as we are talking about entanglement) constitute acceleration? Or is this just a stupid question :) Thanks in advance.