His paintings consisting of “Virgin of the Rocks,” “The Last Supper” and “Mona Lisa have influenced countless artists. Painting made Leonardo familiar about anatomy and perspective. He had many jobs such as designing artillery and planning river system diversions. Leonardo started to study human anatomy as he got further interested in science. Towards the end of Leonardo’s life he had a huge breakthrough in his scientific career by making a theory of what the four powers (Movement, weight, force and percussion) worked. He applied them to the phenomenon called the human body. To accomplish what he wanted to know about the human body, Leonardo dissected about thirty bodies. Leonardo also worked with physics and used it in many of his investigations.