Eponym of the week: William Mathias Scholl, the Dr. Scholl behind the foot-products company. Working in a Chicago shoe store as a teen around 1900, he started taking night classes in podiatry, eventually getting a medical degree. He got the first of his many patents at age 22, for a mechanical arch support, and later endowed a college of podiatric medicine in Chicago.

Three of the four major North American professional sports currently have the same number of teams. Which of the four has more teams than the others?

A) The NFL

B) The NBA

C) The NHL

D) Major League Baseball

Wednesday’s answer: TNT was used as a dye before its explosive properties were fully appreciated.