One of the things I learned at the Leonardo Da Vinci museum was that Da Vinci designed a “tank.” This “tank” was described as a turtle-shaped covered chariot. It featured a low viewing tower, several light cannons, and four wheels. The machine was maneuvered by eight men inside the tank who would use cranks to turn the wheels. When I looked at the one they had on display, I was surprised how light the wood on the outside was, considering all the cannons it had to carry. I knew about Da Vinci’s flying inventions and his artistic works, but never knew he developed one of the earliest tanks.