SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Statue of Leonardo da Vinci outside the Uffizi Gallery, Florence. Italian artist and inventor Leonardo is most famous for his works of art, such as the Last Supper (1498) and the Mona Lisa (1504). Despite having little formal education, he kept extensive notebooks filled with his scientific theories, inventions and architectural designs. His notes show that he carefully investigated principles of mechanical and civil engineering. His schemes included grinding and polishing machinery, and flying machines. Most of his projects were never published nor constructed. After Leonardo's death his notes lay unnoticed in a library until 1796.
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