NOVA.

NOVA

Polar Extremes

Paleontologist Kirk Johnson explores the polar extremes of the planet, including miles-high ice sheets and warm polar forests brimming with life. (60 minutes)

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UPCOMING EPISODES

Wed, 11/26 at 8:00 pm on Austin PBS HDTV

Revolutionary War Weapons

The military technologies that helped propel the colonies to victory, from the Brown Bess musket to the world's first military submarine. (60 minutes)

Thu, 11/27 at 1:30 am on Austin PBS HDTV

Revolutionary War Weapons

The military technologies that helped propel the colonies to victory, from the Brown Bess musket to the world's first military submarine. (60 minutes)

Tue, 12/2 at 6:00 pm on Austin PBS WORLD

Revolutionary War Weapons

The military technologies that helped propel the colonies to victory, from the Brown Bess musket to the world's first military submarine. (60 minutes)

Tue, 12/2 at 11:00 pm on Austin PBS WORLD

Revolutionary War Weapons

The military technologies that helped propel the colonies to victory, from the Brown Bess musket to the world's first military submarine. (60 minutes)

Wed, 12/3 at 7:00 am on Austin PBS WORLD

Revolutionary War Weapons

The military technologies that helped propel the colonies to victory, from the Brown Bess musket to the world's first military submarine. (60 minutes)