Was it a ploy to thwart Renaissance copycats peeking at his notes, or just a way to avoid the inky mess of writing left-handed?
Always a fan of the quick getaway, Da Vinci thought his revolving bridge would be best used in warfare.
This open-shelled model, fitted with seats and gears for the pilot, did not include a design for a crash helmet.
The Triple-Barreled Cannon
More thinker than fighter, Da Vinci's distaste for conflict didn't stop him from dreaming up designs for more efficient cannons
Modern scientists agree it may never have lifted off the ground, but Da Vinci's "helicopter" design is still one of his most famous.
His architectural draughts are highly detailed and even include horse stables with fresh air vents
Da Vinci modeled his perfect human form after the proportions laid out by Vitruvius, an ancient Roman architect.
clipped from: www.livescience.com 
