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

Leonardo da Vinci ... submerged person with air. Da Vinci even devised a pouch for collecting urine during extended ...

Throughout his lifetime, Leonardo da Vinci designed many fantastical flying machines, self-driving carts and even a tank! Explore 3D models of these wonderful designs. In the mid-1480s ...