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  1. The Blue Whales Heart: Astonishing Facts About the Ocean Largest Gains!"** Blue whale

    The Blue Whales Heart: Astonishing Facts About the Ocean Largest Gains!"** Blue whale

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  2. Marine scientists measure the heart rate of the blue whale and it's astonishinglylow

    Marine scientists measure the heart rate of the blue whale and it's astonishinglylow

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