Einstein's Twin Paradox (IMAGE) University of Queensland Caption A clock moving in superposition of different speeds would measure a superposition of different elapsing times -- in a quantum version of the famous 'twin paradox' of special relativity. Credit Magdalena Zych Usage Restrictions Only to be used with this story. Must be credited. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.