Was Einstein Wrong about Space Travel?
23rd Mar 2006, 00:25 GMT
Consider a pair of brothers, identical twins. One gets a job as an astronaut and rockets into deep space. The other stays on Earth. When the traveling twin returns home, he discovers he's younger than his brother. This is Einstein's Twin Paradox, and although it sounds strange, it is absolutely true. The theory of relativity tells us that the faster you travel through space, the slower you travel through time. Rocketing to Alpha Centauri -- warp 9, please -- is a good way to stay young. Or is it? read more
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