A slightly updated version of leonardo da vincis virtuvian man originally drawn circa 1490 a polymath painter musician and writer da vinci invented parachutes machine guns helicopters and ball bearings however pierre michaux is commonly credited with inventing the motorcycle in the 1860s bad luck leokids t shirt design reads bikerus vitruvienwe lovingly print all of our kids t shirts onto 100 cotton soft style loose fitting unisex t shirts for boys and girls