Season 1, Episode 7 The Clean Room
First Aired: April 20, 2014
A look at the work of geochemist Clair Patterson (1922-95), who calculated the age of the Earth—4.5 billion years—using a uranium-lead dating method, and also drew attention to the dangers of lead in the atmosphere and the food chain.
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- Premiered: March 9, 2014
- Rating: None
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