MinutePhysics is attempting to produce a series of video lessons on Special Relativity, using an approach, according to the video, that will be different and "simpler" than the traditional method that SR has been taught in schools. Since we often get questions on here about this topic, especially on the consequences of SR postulates such as time-dilation and length-contraction, I thought maybe it is appropriate to present these videos in a thread in this forum. If this material is effective and useful, it can be used to point to new members who often want to learn about SR, but were too afraid to go look for them! :) The series has just started, so only the intro to the series (Chapter 1) appearing so far. I'll update and post the videos in the series as they appear, or you can subscribe to the Minute Physics channel on YouTube. Chapter 1 Not sure if you need build that contraption that was shown at the end of the video. It'll be interesting to see how that will be used to illustrate the time-dilation/length-contraction effects. Zz.