Einstein came up with an example to show the effects of time dilation that he called the "twin paradox." It's a lot like the Time Traveler game you just played. Let's try it out with a pair of ...

Since Einstein's twin paradox, the idea of twins and space exploration has been on many people's minds. NASA's twin study is far from Einstein's work, but it helped us understand something ...

A paradox can be defined as a statement or situation ... which were consistent with the predictions from Einstein’s theory.

"One sees in this paradox the germ of ... This is a cornerstone of Einstein's special theory of relativity. Related stories How does your space-traveling twin age compared to you?