When it comes to dining, the Greenland shark has an interesting technique. With its rolling motion, this shark uses its upper jaw teeth, which are thin and pointed, to anchor itself while the lower ...

Although they possess sharp teeth, nurse sharks primarily feed on crustaceans ... far from human contact. Close up image of a greenland shark taken at the floe edge of the Admiralty Inlet, Nunavut. By ...

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Sharks have ruled the Earth’s oceans for 400 million years and recent research on fossilized shark teeth has led to the ...

The ratios of strontium isotopes in fossil shark teeth can be used to better understand how coastal environments evolved in ancient times, according to our newly published work. Our study was one ...

Remarkably, fossil shark teeth are also incredibly abundant. Sharks ruled the earth's oceans for 400 million years, and every individual grows and sheds thousands of teeth in their lifetime.

Our study was one of the first to date Florida coastal deposits using fossil shark teeth and a technique that looks at variations in ocean strontium. Strontium is a chemical element that occurs ...

Nielsen and his colleagues found that the estimated age of a Greenland shark was over 272 years, though some models suggested that the upper age limit could be nearly 500 years. Its discovery ...

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