This blog is where we announce new videos & talk about the power of explanation & the change it can create. 

An Awesome Explanation of A Differential Gear

Kottke reminded me this morning about this mid-century video that explains, very clearly, how a differential gear works in automobiles. Watch: 

Email readers can watch here

Notice how the video starts with a scene that everyone can grasp before going into more technical information. They focus on "why" before "how". The simple model they use to explain the mechanism is a great example of simplification. The "noise" of the actual gear is removed so the instructor can focus on the big ideas. A truly remarkable explanation.