Paragraph 2
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
."
