In 1570, a Frenchman was arrested for smuggling clandestine correspondence between France and England in a basket of cheese.

Once upon a time, tennis balls had a whole different vibe. Now they're serving looks in neon—and for a very good reason.

For decades, tennis events played on clay have relied on human line judges calling the bounce of the ball and chair umpires coming down to inspect the marks they leave in the red dirt.