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 goes wrong: a tear, the application of an illegal foreign substance, or a dent from overuse. Nevertheless, if...