Length contraction is a fundamental aspect of the theory of special relativity. When there is a relative velocity between two inertial frames of reference, there will be an apparent change in length of the objects in one frame as viewed from the other frame. This effect is only apparent at velocities close to the speed of light, making it hard to get an intuitive feel for how objects appear in the theory. The standard example is the pole and barn thought experiment of Taylor and Wheeler. The paradox is that one person sitting in the barn will see the pole fit entirely inside the barn while a person running along with the pole will see a shortened barn into which his pole cannot fit. The explanation of this apparent logical contradiction includes the relativity of simultaneity, which can be observed in this Demonstration by examining the order of events in one frame compared to the other.