In 4,000 Years, One Thing Hasn't Changed: It Takes Time To Buy Light | WAMU 88.5 - American University Radio
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In 4,000 Years, One Thing Hasn't Changed: It Takes Time To Buy Light

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You can trace 4,000 years of economic growth through the history of light. The ways we got from a candle, made from of animal fat, to the LED lights we have today tell a lot about our modern economy.
WAMU 88.5

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