Leonardo's Invention of the Submarine

The first sketches of a submarine war ship were created by Leonardo da Vinci. He kept these sketches a secret becuase he did not want war to be more scary and violent than it was before. The drawings of the submarine were basically an empty shell with a conning tower on the top. By reading the notes and sketches of Leonardo's submarine, scientists discovered that there would not be enough mechanics for this submarine to actually submerge under water. This ship's name was NOT a submarine, it was called "a ship to sink another ship".