Cosmos · SEASON 1
The Clean Room
Episode 7 · 2014-04-20
- Documentary
Episode overview
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.
44 minutes
Season 1 episodes
1. Standing Up in the Milky Way2014-03-09
2. Some of the Things that Molecules Do2014-03-16
3. When Knowledge Conquered Fear2014-03-23
4. A Sky Full of Ghosts2014-03-30
5. Hiding in the Light2014-04-06
6. Deeper, Deeper, Deeper Still2014-04-13
7. The Clean Room2014-04-20
8. Sisters of the Sun2014-04-27
9. The Lost Worlds of Planet Earth2014-05-04
10. The Electric Boy2014-05-11
11. The Immortals2014-05-18
12. The World Set Free2014-06-01
13. Unafraid of the Dark2014-06-08
