In honor of How It Works Month here at PopSci, please enjoy with us this elegantly done film explaining how a differential gear works. It dates from the 1930s, but BoingBoing reminded us how truly excellent it is.
The film was created by Chevrolet and stars the Victor McLaglen Motor Corps. The explaining starts around 1:50.
This month's How It Works section is brought to you by Digikey. All posts are purely editorial content, which we are pleased to present with the help of a sponsor; the sponsor has no input in the content itself.