Video - Da Vinci's Tank: Renaissance Military Genius?

Did you know that Leonardo da Vinci designed a tank in the 15th century? That's right, the Renaissance man wasn't just into painting and sculpting; he also had a knack for military engineering. His tank design looked like a giant turtle shell on wheels and was intended to be powered by eight men turning cranks. Imagine a bunch of guys running inside a giant metal hamster wheel—now that's a workout! The tank was equipped with cannons all around, but there was one tiny flaw: the gears were designed to move in opposite directions, making the tank impossible to move. Oops, even geniuses have off days! If Leonardo had fixed that, who knows? We might have seen these rolling around in medieval battles. What do you think about da Vinci as a military mastermind? Let us know in the comments!