Sharks have ruled the Earth’s oceans for 400 million years and recent research on fossilized shark teeth has led to the ...

Others are curved and can be used to hook prey, such as those of hooktooth sharks. Some sharks have teeth that are flat and very strong. They are typically found in species that live at the bottom of ...

Emma Bernard, a curator of fossil fish at the Museum, says, 'Shark-like scales from the Late Ordovician have been found, but no teeth. If these were from sharks it would suggest that the earliest ...

Remarkably, fossil shark teeth are also incredibly abundant ... For example, because certain species of ground sloths are not found at the Montbrook site (5.85 million years old) but are found ...

Researchers must interpret ecosystems based on fossilized remains and the sedimentary layers in which they are found. Shark teeth are especially valuable for this purpose. Their abundance and ...