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OUR TEETH EVOLVED FROM FISH 'BODY ARMOUR'
Issue 205
|How It Works UK
Our sensitive teeth evolved from the 'body armour' of extinct fish that lived 465 million years ago.
In a new study, researchers showed how sensory tissue discovered on the exoskeletons of ancient fish is linked to the same 'genetic toolkit' that produces human teeth. The researchers set out to identify the earliest vertebrate in the fossil record, seeking out fossil specimens from the Cambrian and Ordovician periods. One telltale sign of a vertebrate is the presence of intern
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