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    Video thumbnail: Nature The Animal House - Preview

    Nature

    The Animal House - Preview

    Airs Wednesday, February 12, 2014 at 8:00 p.m. ET/PT. Check your local listings.

    The Animal House - Preview

    Video thumbnail: Nature The Animal House - Preview

    Nature

    The Animal House - Preview

    Premieres Wednesday, November 2, 2011 8:00 p.m. ET/PT. Check your local listings.

    The Animal House - Preview

    Video thumbnail: Nature A City of Twelve Million

    Nature

    A City of Twelve Million

    Leafcutter ants shift 40 tons of soil to make their subterranean home.

    A City of Twelve Million

    Video thumbnail: Nature A Crystal Chalice

    Nature

    A Crystal Chalice

    Male swiftlets use their own building material, gluey saliva, to make their nests.

    A Crystal Chalice

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