Fermilab physicist Don Lincoln explains a well-known thought experiment examining the consequences of special relativity. “Time waits for no man” goes the saying, and it appears to be true. Inexorably ...

Albert Einstein’s “twin paradox” is a famous counterintuitive implication of the special theory of relativity, but it also reveals deep links between physics and philosophy, as Robert P Crease ...

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 ...