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 ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Einstein's theory of special relativity teaches us that time is relative. But what does it mean ...

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 ...