Was Einstein Wrong about Space Travel?

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.

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<p><a href="http://www.physorg.com/news12032.html">Was Einstein Wrong about Space Travel?</a></p> <p>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.</p>