The hunters usually left the shark heads behind, allowing modern-day experts a glimpse of what the marine ecosystem was like in the past. The museum contains teeth ... the sand tiger shark-they ...

Sand tiger sharks, also known as gray nurse sharks, have a deceivingly ferocious look. They are large-bodied and display a mouthful of sharp teeth that protrude in all directions, even when the ...

Teeth are some of the best-preserved remnants of ancient sharks ... For example, he said, "extinct tiger sharks were 'generalists' feeding on a wide range of food types, just like the modern ...

A prehistoric dugong preyed upon by an ancient ... were also found on the skull, along with a tiger shark tooth in the neck.

The earliest shark-like teeth we have come from an Early Devonian (410-million-year-old) fossil belonging to an ancient fish called Doliodus problematicus. Described as the 'least shark-like shark', ...

The first sharks on Earth: Ancient relatives of sharks first appeared ... Their skin is covered with denticles, tooth-like scales that differ from the scales of bony fish. And they have five ...

A prehistoric food fight may have spelled the end for the megalodon, the largest shark that ever lived. A study of the ocean giant's fossil teeth suggests it had to compete for food with another ...

When you think about sharks, the first thing that might come to mind are huge jaws filled with rows of deadly-looking teeth. But shark teeth come in many shapes and sizes. They can tell us how these ...

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.

bull or tiger sharks. They are generally curious and may investigate humans or objects in the water out of curiosity rather than aggression. However, their large size, agility, and sharp teeth ...

[Related: The ‘granddaddy’ of all early hominins walked on Earth a lot longer than we thought.] Fossil teeth can help us ...

"This species of scallop has been extinct for almost 2 million years," the poster from North Carolina told Newsweek.