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
  • Premise: Astrophysicist Neil deGrasse Tyson hosts a reboot of Carl Sagan's "Cosmos," the landmark 1980 PBS series that explored all aspects of the universe. The new version features an upgrade of the Cosmic Calendar, and is co-produced by Ann Druyan, Sagan's widow. (more)

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