Home / Series / Cosmos (2014) / Aired Order / Season 1 / Episode 7

The Clean Room

To determine the true age of the Earth, geochemist Clair Patterson developed the uranium-lead dating method to make an unprecedented discovery—calculating Earth's age of 4.5 billion years. But Patterson's groundbreaking discoveries were just beginning. Patterson made it his mission to draw public attention to the detrimental effects of lead in the environment and dedicated his career to fighting against the petroleum and chemical industry, eventually achieving public health's biggest victory of the 20th century.

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  • Originally Aired April 20, 2014
  • Runtime 44 minutes
  • Content Rating United States of America TV-PG
  • Network FOX
  • On Other Sites IMDB
  • Created February 8, 2021 by
    Administrator admin
  • Modified September 13, 2022 by
    monto
Name Type Role
Ann Druyan Writer
Steven Soter Writer
Richard Gere Guest Star
Piotr Michael Guest Star
Marc Worden Guest Star
Brannon Braga Director