Space and time looked settled, at least in broad outline. Einstein’s special relativity gave physics a durable framework for ...

The speed of light remains one of physics’ firmest assumptions, but scientists still test whether it ever shifts under ...

Everyone knows that relativity plays hell with time, and that it can do a number on space, but what about mass? Why do objects get more or less mass depending on their relative speed? We’re going to ...

Addressing a controversy first raised around 1910, two physicists have performed experiments with the aid of an engineer that validate anew the special theory of relativity’s limitations on the speed ...

We've all heard of relativity, but what is it? How does it relate to light and motion? So we've all heard of relativity, right? But... what is relativity? And how does it relate to light? And motion?

To make the admittedly weird concept of relativity easier to understand, a team of developers has created a video game that slows down the speed of light. Subscribe to read this story ad-free Get ...

In a bizarre repercussion of Albert Einstein's Special Theory of Relativity, objects traveling close to the speed of light appear flipped over. The Special Theory of Relativity, or special relativity ...

The motion of any object is relative. On Earth we tend to ignore that, because the vast background of the ground gives us a seemingly fixed and absolute frame of reference. Sitting comfortably at our ...