When discussing special relativity, the time dilation of mu-mesons is one of the most cited examples of experimental evidence in support of Einstein's theory. In this short documentary experimental physicists David Frisch and James Smith take the viewer through the basic theory and experiment involved in testing and confirming the extended lifespan of mu-mesons. PDF of the original paper - https://drive.google.com/drive/folders/0B0uFPjs1FQ5KUVA1S1ZhaGFXUzQ?usp=sharing ----