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Kid's around a life-size model of a whale heart at the Carnegie Museum. Photo: <a href="http://www.flickr.com/photos/nosuchuser/4152475705">feral godmother</a>, Creative Commons, some rights reserved
Kid's around a life-size model of a whale heart at the Carnegie Museum. Photo: feral godmother, Creative Commons, some rights reserved

Natural Selections: Animal hearts

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From worms to whales, most creatures have hearts. In a worm it's a simple tube, in a whale it can pump 60 gallons of blood per minute.

Dr. Curt Stager and Martha Foley discuss the variety of hearts in the animal kingdom.

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