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Nuts and Bolts
99% Invisible
The Seven Small Inventions That Make Up the Modern World
The bicycle wasn't actually invented until reasonably recently, like so near a few hundred years old. The next stop in our tour of seven small inventions that make up the modern world is the spring. I was really intrigued by your explanation of a tire and just what a tire is. Can you say a little bit more about that? Yeah.
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