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NOVA
Ancient Earth: Birth of the Sky
Season 50
Episode 11
Early Earth was a hellscape of molten lava and barren rock, bombarded by meteors, with no atmosphere at all. How did our familiar blue sky – the thin, life-giving band of gasses protecting our planet – come to be?
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52:53
Can science help us understand why some people commit horrific acts of mass murder?
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52:52
A team uncovers the advanced engineering behind an ancient Egyptian war machine.
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53:10
Shared DNA reveals a deep connection with our long-vanished human cousins.
1:53:49
A two-hour special from the producers of "Making Stuff"
53:10
Is our universe unique, or could it be just one in an endless "multiverse"?
53:40
Take a wild ride into the quantum realm, where even the impossible seems possible.
53:40
It defines our lives, but what is time really? Have a look into its true nature.
53:40
Surprising clues indicate that space is very much something and not nothing.
1:43:15
We are on the verge of answering one of the greatest questions in history: Are we alone?
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53:05
Big quakes are inevitable, but can we prevent their devastation?
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52:52
Can markets be rational when humans aren't?
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1:42:48
Seven doctors, 21 years... Saving lives is only part of the story.