Leo wins! According to mental_floss's learned readers, Leonardo da Vinci is history's greatest genius. While the Renaissance man may have easily bested Albert Einstein in the 65-person tournament's final round, his path to the title wasn't so easy. He had to survive a controversial first-round matchup against Burt Reynolds that went into a runoff due to allegations of voter fraud, and then he had to slip past Sigmund Freud, Galileo, Nikola Tesla, and Benjamin Franklin.
Through it all, though, the Italian polymath's supporters came out in droves, and it seems that no other genius could quite match Leonardo's combination of artistic mastery and scientific acumen. Congratulations, Leonardo! Consider this one more addition to your lengthy, impressive resume.