Do you know more than da Vinci, Einstein and Ibn Sina?

Three of history's greatest minds stood at the frontier of what their century knew. You stand on a later floor of the same escalator. Answer a short set of questions to find out which frontier of settled knowledge you reach, and why that is the rising floor rather than a sharper mind.

24 questions, about four minutes. No sign-up. This measures where you stand on the escalator of knowledge, not how clever you are.