Some of the other teeth belonged to scavenging sixgill sharks that most likely lost some of their teeth there while eating the carcasses of the dead great jagged narrow-toothed sharks. Immediately ...

The earliest shark-like teeth we have come from an Early Devonian (410-million-year-old ... By the Early Jurassic Period (195 million years ago) the oldest-known group of modern sharks, the ...

The footage, shared by marine research organization OceanX, captures a rare encounter with a bluntnose sixgill shark — a species so ancient it predates most dinosaurs. The video has quickly gone ...