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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.
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.
Guest stars

Richard Gere
Clair Patterson (voice)

Piotr Michael
Edmund Muskie (voice)

Marc Worden
Harrison Brown (voice)

Larry Cedar

Christopher Emerson

Stoney Emshwiller

Keythe Farley

Nick Jameson

Michael McConnohie

Enn Reitel
Crew

Brannon Braga
Director

Steven Soter
Writer

Ann Druyan
Writer