Where did jaws come from? This ancient fish from the Rockies

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http://i.cbc.ca/1.2672168.1402502544!/fileImage/httpImage/image.jpg_gen/derivatives/16x9_460/metaspriggina-reconstruction.jpg The evolution of jaws allowed animals to chow down on foods they could never dream of eating before. Now, paleontologists in the Canadian Rockies think they have uncovered the origin of that evolutionary breakthrough.


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