Fish scales evolve into tooth enamel

The enamel that gives our teeth their bite evolved from the scales of ancient fish that lived more than 400 million years ago. Have you ever wondered what it would be like to know that enamel first arose on fish scales?!  Over decades of years, scientists have been trying to find out where enamel first appeared. In late September, scientists discovered that the human enamel actually evolved from the scales of a fish. Enamel is the hardest substance in the human body.  The North American gar (a fish known as Lepisosteus) has ganoine on its scales. Ganoine is a substance similar to human tooth enamel. Ahlberg (a group of scientists who study about genomics). Most of this research focused on the historical record of living creatures. In the new study, Ahlberg and his team also used a new kind of science: genomics. It is the study of genetic information stored in DNA. This kind of fish was an ancient kind of fish and it had gamone. Scientists have been trying to figure this out for decades. But finally have discovered it when doing a study on different fish, and their scales.

Then, the scientists went forward onto studying about the DNA of the North American gar. The genes in the gar was built up of two or three blocks of enamel. And Ahlberg showed evidence that ganoine was definitely enamel.

 The North American Gar was yet again put on a study when Ahlberg decided that they wanted to know if enamel was also on the fish’s teeth. This study turned up negative, the enamel only appeared on their scales. Ahlberg has made the conclusion that enamel first appeared on scales rather than teeth. Ahlberg and his team now plan to continue to study the world of the enamel, and who knows, maybe we will find how human teeth formed…..