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"Nuts and Bolts: Seven Small Inventions That Changed the World (in a Big Way)" by Roma Agrawal
The Next Big Idea Daily
Scarcity of Nails and the Power of Lenses: Small Inventions That Transformed the World
Roma Agrawal explores the significance of two small inventions that have had a profound effect on the world: the scarcity of nails in the past and the revolution of lenses. She also shares a personal story about how the invention of lenses played a role in her daughter's existence through IVF.
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