The wheel's many reinventions

"Don't reinvent the wheel" is a common phrase, but structural engineer Roma Agrawal doesn't buy it. Roma has a new book out, Nuts and Bolts: Seven Small Inventions That Changed the World (in a Big Way). And in it, she argues that the re-interpretation of the wheel has been critical to modernizing the economy from a pottery wheel in ancient Mesopotamia to the gyroscope on the International Space Station. Today, how this constant reinvention fuels economic progress.Related Episodes:What nails can tell us about the economyFor sponsor-free episodes of The Indicator from Planet Money, subscribe to Planet Money+ via Apple Podcasts or at plus.npr.org. Music by Drop Electric. Find us: TikTok, Instagram, Facebook, Newsletter.

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A little show about big ideas. From the people who make Planet Money, The Indicator helps you make sense of what's happening today. It's a quick hit of insight into work, business, the economy, and everything else. Listen weekday afternoons.Try Planet Money+! a new way to support the show you love, get a sponsor-free feed of the podcast, *and* get access to bonus content. You'll also get access to The Indicator and Planet Money Summer School, both without interruptions. sign up at plus.npr.org/planetmoney