It is estimated that its jaw would span 2.7 by 3.4 metres wide, easily big enough to swallow two adult people side-by-side. These jaws were lined with 276 teeth, and studies reconstructing the shark's ...

Because this monstrous shark was a fish made mainly of cartilage, its huge teeth were its only artifacts. This video explores how scientists use teeth to determine the size of sharks – from the ...

Just in time for summer, the megalodon—the ancient, city bus-sized shark known as the “Megatooth”—has reared its ravenous snout. While the oceans are now safe from the Megatooth, which went extinct an ...

In fact, a T-rex would have been a quick snack for megalodon. Its head would have easily fit inside the gargantuan shark's mouth.

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.

Shark tooth fossils in sandstone matrix, Lamna obliqua, Eocene Epoch (56 to 34 million years ago), ... [+] Morocco, (Specimen courtesy of Ron Stebler, Scottsdale, Arizona, USA), (Photo by Wild ...

Sharks have teeth that are kind of on a conveyor belt. As the front ones break out, they're replaced by others that roll forward to take their place. Big shark species might get through 50,000 ...

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 ...