Watching these tennis balls being made is oddly satisfying

Olympics - Table Tennis event explained

This fascinating video below shows the crazy amount of steps that it takes to make something as simple as a tennis ball. Not only does it require a vast assortment of machinery, as you might expect, but it also takes an army of fast-working humans.

And for some reason, we can't stop watching.

SEE MORE: Everything you need to know about Rio... in one place!

The 20-step process includes never-ending sheets of wool, huge tubs of glue and a countless number of hands that pull everything together.

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It would be pretty difficult to find someone who's never touched a tennis ball. But how many people have actually thought about the process it takes to make one?

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