Name: Episode 7 — The Clean Room
Released: 2014-04-20
Duration: 44 min
Rating: 8.2
Cast: Neil deGrasse Tyson, Ann Druyan

Cosmos (2014 – 2020)

2014 • 2 seasons • Documentary • TV-PG

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85% 1,636

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Episode 7 — The Clean Room

Released: 2014-04-20 • Documentary

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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.

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Creator	Ann Druyan
Episode air date	20.04.2014
Episode runtime	44 min
Episode rating	8.20
Genres	Documentary
TMDB series rating	8.5
IMDb series rating	9.2
Series status	Ended
Age rating	6+
Country	US

Cosmos (2014 – 2020)

Episode 7 — The Clean Room

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