Extras

Video thumbnail: Nature Cracking the Koala Code - Preview

Nature

Cracking the Koala Code - Preview

Premieres Wednesday, May 16, 2012 at 8:00 p.m. ET/PT. Check your local listings.

Cracking the Koala Code - Preview

Video thumbnail: Nature A Battle for Territory

Nature

A Battle for Territory

A fight erupts between two koalas after one of the males invades the other's territory.

A Battle for Territory

Video thumbnail: Nature A White Lion Challenges a Hyena Clan

Nature

A White Lion Challenges a Hyena Clan

A white cub, now almost a grown lion, challenges an approaching clan of hyenas.

A White Lion Challenges a Hyena Clan

Video thumbnail: Nature A Fight Between Lions

Nature

A Fight Between Lions

Two lionesses attack an unfamiliar and aggressive male who approaches the pride.

A Fight Between Lions

Video thumbnail: Nature River of No Return - Preview

Nature

River of No Return - Preview

Premieres Wednesday, April 18, 2012 at 8:00 p.m. ET/PT. Check your local listings.

River of No Return - Preview

Video thumbnail: Nature Wolf Pups Right Off the Trail

Nature

Wolf Pups Right Off the Trail

Isaac and Bjornen come across a group of wolf pups right off the trail.

Wolf Pups Right Off the Trail

Video thumbnail: Nature This Unexplained Companion

Nature

This Unexplained Companion

A pack of wolves isolates an injured elk on a ridge. Then, something remarkable happens.

This Unexplained Companion

Video thumbnail: Nature This Land is My Land

Nature

This Land is My Land

Isaac and Bjornen play harmonica deep in the Frank Church-River of No Return wilderness.

This Land is My Land

Video thumbnail: Nature An Ancient Game..

Nature

An Ancient Game..

In Chamberlain Basin, Isaac and Bjornen watch as a pack of wolves eyes white-tailed deer.

An Ancient Game..

Video thumbnail: Nature Ocean Giants, "Voices of the Sea" - Preview

Nature

Ocean Giants, "Voices of the Sea" - Preview

Airs Wednesday, April 11, 2012 at 8:00 p.m. ET/PT. Check your local listings.

Ocean Giants, "Voices of the Sea" - Preview

Video thumbnail: Nature Ocean Giants: Deep Thinkers

Nature

Ocean Giants: Deep Thinkers

Airs Wednesday, April 4, 2012 at 8:00 p.m. ET/PT. Check your local listings.

Ocean Giants: Deep Thinkers

Video thumbnail: Nature Ocean Giants "Giant Lives" - Preview

Nature

Ocean Giants "Giant Lives" - Preview

Airs Wednesday, March 28, 2012 at 8:00 p.m. ET/PT. Check your local listings.

Ocean Giants "Giant Lives" - Preview

Video thumbnail: Nature Visit from an Infant Sperm Whale

Nature

Visit from an Infant Sperm Whale

An infant sperm whale, separated from its mother, approaches cameraman Doug Allan.

Visit from an Infant Sperm Whale

Video thumbnail: Nature Songs of the Humpbacks

Nature

Songs of the Humpbacks

Male humpbacks have become famous for the compositions they improvise together.

Songs of the Humpbacks

Video thumbnail: Nature On the Hunt for Herring

Nature

On the Hunt for Herring

Killer whales use a herding call to help hunt a school of herring.

On the Hunt for Herring

Video thumbnail: Nature The Oldest Mammal on the Planet

Nature

The Oldest Mammal on the Planet

Living up to 200 years, Bowhead Whales are one of the oldest animals on the planet.

The Oldest Mammal on the Planet

Video thumbnail: Nature The Humpback Mating Marathon

Nature

The Humpback Mating Marathon

A group of humpback males compete for the affection of a female.

The Humpback Mating Marathon

Video thumbnail: Nature Dolphin Mud Walls

Nature

Dolphin Mud Walls

In Florida Bay, dolphins feed by creating walls of mud that trap nearby fish.

Dolphin Mud Walls

Video thumbnail: Nature Dolphin Bubble Play

Nature

Dolphin Bubble Play

What will dolphins make of the silvery rings of air produced by a bubble machine?

Dolphin Bubble Play

Video thumbnail: Nature Urban Territories

Nature

Urban Territories

How does the size of urban raccoon territory compare to that of its rural counterpart?

Urban Territories

Video thumbnail: Nature A Sense of Curiosity

Nature

A Sense of Curiosity

The connection between the raccoon's dexterity, immense curiosity, and intelligence.

A Sense of Curiosity

Video thumbnail: Nature Raccoon First Night Out

Nature

Raccoon First Night Out

A raccoon mother gathers her kits for a trip into the city.

Raccoon First Night Out

Video thumbnail: Nature Living for the City

Nature

Living for the City

Intelligence, adaptability and diet help the raccoon thrive in urban landscapes.

Living for the City

Video thumbnail: Nature The Importance of Play

Nature

The Importance of Play

Animal play teaches animals about how things work, and the physics of the world.

The Importance of Play

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