This article predates the current owners of Science Blog. It has not been reviewed under the current editorial process and is kept as part of the archive. Einstein’s special relativity is sometimes ...

The theory of special relativity is rife with counterintuitive and surprising effects, the most famous of which are length contraction and time dilation. If an object travels at a relative speed, ...

Chapters 0:00 - All light is basically the same 1:44 - Our slow-mo world 2:38 - Doppler effect 4:38 - How colors distort near ...

Tracking time is one of those things that seems easy, until you really start to get into the details of what time actually is. We define a second as 9,192,631,770 oscillations of a cesium atom.