Ever wonder why baseball has four bases? Or why baseball gloves look the way that they do?

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The rules of kickball seem obvious, but did you ever wonder why its played by most every school kid in the US? 

These are all topics explored in the new book, On the Origins of Sports: The Early History and Original Rules of Everybody's Favorite Games. 

A Martinez spoke to

, who co-wrote the book with Neil Fine, and began the interview by asking where the idea for the book came from. 

(click the blue arrow above to hear the interview)