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   deep      directly      earliest      excited      mirror      origin      origins      researchers      similar      tree  

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The say the acanthothoracid was one of the jawed vertebrates with teeth ever to live. They were very at seeing how its teeth were to ours. A co-author of the study, Professor Per Ahlberg, said: "These findings change our whole understanding of the of teeth." He commented on the similarity to the fish, saying: "Their jawbones resemble those of bony fish and seem to be ancestral to our own. When you grin at the bathroom in the morning, the teeth that grin back at you can trace their right back to the first jawed vertebrates." Another researcher said: "Nobody expected to find teeth so on the evolutionary ."

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