Tennis Balls
Even sports change over time. Tennis balls today are made with rubber to help them bounce, but the original tennis balls were made from leather stuffed with wool.
More recently, tennis balls used to be white! Once colored TV showed up, it was determined that bright yellow was the best color to see clearly on a TV set, so the ball color was changed.
More recently, tennis balls used to be white! Once colored TV showed up, it was determined that bright yellow was the best color to see clearly on a TV set, so the ball color was changed.