The Secret History of Balls: The Stories Behind the Things We Love to Catch, Whack, Throw, Kick, Bounce and Bat

You may fancy yourself a sports fan, but chances are you don't know:

A fish eyeball was used as the center of some nineteenth-century baseballs

The race to make better billiard balls led to the invention of plastics

The Nerf ball was originally created to be part of a board game featuring cavemen

Balls are the unsung heroes of sports. They are smacked, flung, dribbled, crushed, thrown, and kicked. They're usually only the subject of scrutiny when something …