In 1850, Charles Goodyear was the first who discovered the rubber from India. He then manufactured the first of the tennis balls and by 1870 it was being used to play sports.Tennis balls today are made of a hollow rubber core and covered in wool or nylon shell which is known as the nap. There is a type of pressurized air inside the the rubber core is what makes the ball bounce. Tennis balls are very useful for exercise and sports around the world.
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