Einstein said that clocks that are moving through space at dramatically divergent speeds will measure time differently, and he used his famous “twin paradox” to illustrate the point. But there are ...

More accurate clocks and sensors may result from a recently proposed experiment, linking an Einstein-devised paradox to quantum mechanics. A physicist said the international collaboration aimed to ...

A new study reveals that typically developing twins consistently take on the dominant role over their nontypically developing siblings, even after developmental gaps are resolved. By highlighting how ...