Teeth grew from the scales of primitive shark ... Andrew Gillis/Gillis Lab A close-up of a fish scale Lead scientist Dr Andrew Gillis, from the Department of Zoology, said: "Stroke a shark and ...

The new species was identified by its DNA, scale arrangement, teeth, skull shape, coloring and other subtle physical features ...

Dental cleanings help keep your mouth healthy by clearing away plaque and tartar build-up, which if left untreated can lead to deeper pockets between your teeth and gums, where bacteria can settle.