A tennis ball can do a lot. It adds motion and time to the static facts of the objects around you. It inserts an unpredictable element into space. It also made a perfect substitute for a baseball ...

What are tennis balls made of? Modern tennis balls are made of a hollow rubber core, covered in a wool or nylon shell which is known as the nap. Pressurised air inside the rubber core makes the ball ...

Quick survey: How many of you crack open a new can of tennis balls every time you play? Sure, there are some hoarders out there with a racquet bag full of used balls. But for a large portion of ...