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Video thumbnail: Nature Bears of the Last Frontier: Arctic Wanderers - Preview

Nature

Bears of the Last Frontier: Arctic Wanderers - Preview

Airs Wednesday, July 25, 2012 at 8:00 p.m. ET/PT. Check your local listings.

Bears of the Last Frontier: Arctic Wanderers - Preview

Video thumbnail: Nature Caribou Shaping the Landscape

Nature

Caribou Shaping the Landscape

Huge herds of caribou play an integral role in shaping the Arctic landscape.

Caribou Shaping the Landscape

Video thumbnail: Nature The First Catch

Nature

The First Catch

A cub catches its first salmon at Brooks Range, high in the Alaskan Arctic.

The First Catch

Video thumbnail: Nature A Frozen Ocean

Nature

A Frozen Ocean

When the ocean freezes over, polar bears head out on the pack ice to hunt.

A Frozen Ocean

Video thumbnail: Nature Losing Pack Ice

Nature

Losing Pack Ice

As loss of pack ice increases, polar bears struggle to navigate an ocean of melting ice.

Losing Pack Ice

Video thumbnail: Nature A Polar Bear Approaches

Nature

A Polar Bear Approaches

Ecologist Chris Morgan decides to head out after an agitated polar bear approaches.

A Polar Bear Approaches

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