Quick, what do you know about Leonardo da Vinci? He painted the Mona Lisa! He wrote his notes backwards! He designed supercool bridges and flying machines! He was a genius about, um… a lot of other… things… and, um, stuff…

Source:  http://www.openculture.com/2017/07/leonardo-da-vincis-visionary-notebooks-now-online-browse-570-digitized-pages.html