Extras

    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 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 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 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 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 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 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