Explore 3D models of these wonderful designs. In the mid-1480s, Leonardo da Vinci designed an armored tank for the Duke of Milan. Explore a 3D model of this innovative design and learn how it ...

A pair of his most famous concepts, the helical air screw and an armored mobile ... we examine 15 inventions you may not have ...

Long before Silicon Valley pitches or Shark Tank deals, there was Leonardo da Vinci, an artist, scientist and part-time time ...