Fluids thicken at the speed of light: A new theory extends Einstein's relativity to real fluids

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, which is a non-negligible fraction of the speed of light, with respect to an observer, the length of the object in the travel direction will appear shorter to the observer than it actually is in the object's rest frame.