S5 E6: Our Atmosphere

Original Air Date: Apr 1, 2008

How the earth's atmosphere came to be; the one man to have braved the atmosphere's upper reaches and survived.

Nov 8

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3:59AM

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54 Min

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2008

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TV-PG

AVAILABLE NOW

S7 E17: Snowball Earth

Original Air Date: Aug 22, 2010

Scientists postulate that Earth was once sheathed in ice and complex animals evolved when the planet thawed, due to the release of carbon dioxide.

Nov 8

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2:15AM

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54 Min

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TV-PG

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Available with Freestream