Modern Marvels

Season 13 Episode 37

Copper

0
Aired Wednesday 10:00 PM Sep 13, 2006 on The History Channel

Trivia

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  • Trivia

    • In 1982, the U.S. Mint changed the composition of a penny from 95% copper to just 2.6% copper and 97.4% zinc, to keep production costs under one cent per coin.

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