A “ serrated blade” found sticking from a rock in the United Kingdom has been identified as a “nearly perfect” prehistoric ...

Nicknamed the Ginsu shark after the kitchen knife that slices and dices, Cretoxyrhina ripped apart prey with a mouth full of razor-sharp, bone-shearing teeth. Evidence suggests Cretoxyrhina fed on ...

Serrated teeth have a jagged edge - a bit like the blade of a bread knife. Sharks don’t chew, so this combination of pointed lower teeth and serrated upper teeth helps them to cut prey into smaller ...

A “serrated blade” found sticking from a rock on Isle of Wight in the UK has been identified as a shark tooth that could be 100 million years old, experts say. Wight Coast Fossils photo A ...