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NOVA
What Happened to the Hole in the Ozone Layer?
The extreme thinning of the Ozone layer threatened to bring on a global crisis from destroying plants and ecosystems to sky-high skin cancer rates. So, what happened?
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53:30
A family turns to science in their struggle to rediscover a history obscured by slavery.
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The inside story of China’s meteoric rise to the forefront of global innovation.
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53:15
How did Earth give rise to humans? See what made our species' existence possible.
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53:45
How did life bounce back after a cataclysmic extinction wiped out some 90% of all species?
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53:47
See how life made the leap to land, turning a barren landscape into a lush, green world.
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53:47
See how Earth transformed from a barren hellscape to a planet capable of sustaining life.
53:31
Who created the Nazca lines and why? New clues to one of the greatest ancient enigmas.
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Ancient footprints provide new evidence of humans and extinct giant beasts of the Ice Age.