Question mark
In the early 13th century, when the growth of communities of scholars (universities) in Paris and other major cities led to an expansion and streamlining of the book-production trade, punctuation was rationalized by assigning Alcuin's stroke-over-dot specifically to interrogatives; by this time the stroke was more sharply curved and can easily be recognized as the modern question mark.
Mark (Australian rules football)
Others claim that the origin of the mark comes from the traditional Aboriginal game of Marn Grook, which is said to possibly have influenced Tom Wills' writing of the laws of the game. It is claimed that in Marn Grook, jumping to catch the ball, called ""mumarki"", an Aboriginal word meaning "to catch", results in a free kick. Some counterclaim this theory as false etymology.