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25 inventions that are way older than you think

Discover 25 Inventions That Are Way Older Than You Think! From ancient batteries to Roman concrete, explore surprising origins of modern tech. Uncover hist ...
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How the invention of the sewing machine led to other modern marvels

How do inventions happen? NPR's Planet Money's team brings us the history of one underappreciated invention that has enabled countless other inventions, from the Phillips screwdriver to Bluetooth. You ...