Strictly speaking, the fuzz on tennis balls isn’t referred to as fuzz. It’s known as the nap, a covering added to a pressurized rubber ball during the manufacturing process. ( ...

Are these tennis balls yellow or green ... they are a type of "fluorescent yellow" that can also be seen as green. So why do some people see different colours? The answer may lie in a previous ...

They are often competitive casualties cast aside after a match, but tennis balls are bouncing back to life thanks to a recycling center as big as a ball machine. Meet the Green Machine.