LONDON: Humans owe their pretty grins to a prehistoric fish which roamed the oceans over 400-million-years ago, a new study has found.
The gruesome gnashers of the primitive fish called Compagopiscis suggests humans may have developed working teeth and jaws much earlier than previously thought.
A 380 million-year-old fossil of the fish, found in Australia, was examined under the latest high energy X rays to create a 3-D image of what it would have looked like.
Researchers led by the University of Bristol, who studied the jaws of Compagopiscis, found that these earliest jawed vertebrates possessed teeth too. This indicates our whites evolved along with, or soon after, the evolution of jaws, they said.
"We were able to visualize every tissue, cell and growth line within the bony jaws, allowing us to study the development of the jaws and teeth. We could then make comparisons with the embryology of living vertebrates, thus demonstrating that placoderms possessed teeth," lead author, Dr Martin Ruecklin of the University of Bristol said.
"This is solid evidence for the presence of teeth in these first jawed vertebrates and solves the debate on origin of teeth," co-author, Philip Donoghue of the University of Bristol's School of Earth Sciences said.
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