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The frozen continent of Antarctica holds vital 
clues to the future of Earth and civilization.

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West Antarctica has been shedding 150 cubic 
kilometers of ice into the ocean each year,

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mostly through a series of major glaciers that 
flow into this region called the Amundsen Sea.

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Scientists have been tracking relatively warm 
currents that have been flowing up from the deep.

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The currents race up the rugged continental slope  

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where they interact with glaciers 
that extend out into the sea.

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Eddies form where the current flows beneath it.

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Up ahead you can see them hitting one of the 
largest and most dynamic of these glaciers  

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called Pine Island.

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You can see the effect these 
warm currents are having by  

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moving into the deep dark spaces below Pine Island.

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The ice above us several hundred meters 
thick has been melting from below.