Michael Scot
The second version of Fibonacci's famous book on mathematics, "Liber Abaci", was dedicated to Scot in 1227, and it has been suggested that Scot played a part in Fibonacci's presentation of the Fibonacci sequence. A recent study of a passage written by Michael Scot on multiple rainbows, a phenomenon only understood by modern physics and recent observations, suggests that Michael Scot may even have had contact with the Tuareg people in the Sahara desert.