Da vinci was the world's greatest genius. he mastered nineteen professions. it was a feat no ordinary man could accomplish easily, if at all.

Leonardo da Vinci (1452-1519) is considered the worlds greatest genius or the ultimate Renaissance man (someone good at everything). He was an Artist, Inventor, and Scientist whose famous works range from the Monalisa, The Last Supper, and the Vitruvian during the Italian Renaissance. Leonardo made an immense contribution to the study of medicine, science, and art with a voice of reason, logic, and science in a world of superstitions.
Contributions to art
He excelled in drawing, painting, and sculpture, the Monalisa and The last super are among his most famous. 
Inventor and Scientist
Leonardo's journal was filled with over 13000 pages of how he observed the world and drew pictures and designs of helicopters, war machines, musical instruments, and hang gliders. 
He studied the human body and drew muscles, tendons and the human skeleton. He also had detailed pictures o the heart, arm and other organs.

Opposition to the nra came to a head in 1935, when the conservative supreme court declared the agency unconstitutional, claiming the nra gave the executive branch regulatory powers that belonged exclusively to congress. this decision began a series of court decisions that overturned key elements of the new deal.