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Extras

    Video thumbnail: Nature Maned Lioness Displays Both Male and Female Traits

    Nature

    Maned Lioness Displays Both Male and Female Traits

    An African lioness that looks and acts male may be the secret to her pride's success.

    Maned Lioness Displays Both Male and Female Traits

    Video thumbnail: Nature The Benefits of Friendship

    Nature

    The Benefits of Friendship

    The social behavior of nonhuman primates and the benefits of friendship.

    The Benefits of Friendship

    Video thumbnail: Nature Animal Odd Couples Preview

    Nature

    Animal Odd Couples Preview

    It's time to challenge the notion that only humans form lasting friendships.

    Animal Odd Couples Preview

    Video thumbnail: Nature The Tortoise and the Goose

    Nature

    The Tortoise and the Goose

    A 45-year-old female Aldabra tortoise was chosen by an unusual suitor: a male Brant goose.

    The Tortoise and the Goose

    Video thumbnail: Nature Kate and Pip

    Nature

    Kate and Pip

    An abandoned fawn is taken in by a Great Dane.

    Kate and Pip

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