Tuesday, March 31, 2015
Monday, March 30, 2015
Sunday, March 29, 2015
Saturday, March 28, 2015
South Facing Dragon
This is a model of a 2,000 year old military weapon. The Chinese invented the differential gear so their "dragon" always faced in the same direction no matter how the cart was twisted and turned. The military advantage was that in the heat, confusion, and dust of battle the generals could always tell what direction they wanted to advance.
