In the absence of much else being discussed here about web design, I have here, an interesting film from Chevrolet explaining why we need a vehicle differential and how they work.
If you were tasked with creating a web site to explain the differential, using the technology developed since 1937, you would have a tough job of creating a site that works better than this one. Jump in at about 3:25 if you don’t need to know why we need differentials.
You’re right. It is a very interesting way of explaining a very complex problem, and it still holds up very well 82 years later. Excellent film editing too by the way.