The ratios of strontium isotopes in fossil shark teeth can be used to better understand how coastal environments evolved in ...

Sloths may be cute from afar, but they “have extremely powerful jaws” and “can break bones with their teeth,” explained zoologist and Sloth Institute director Sam Trull. A Michigan teen ...

They wanted to learn more about how prehistoric megafauna disappeared. Giant sloth teeth can be tough to analyze because they ...

including the front of the skull and teeth. The wide muzzle of G. robustum suggests it was adapted for bulk-feeding on large quantities of poor-qualilty foliage such as grass. Recent detailed ...