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

Various kinds of shark teeth can be found in these places, including those from megalodons, mackerel sharks (including great whites and large mackerel), ground sharks (including sand tigers ...

The fossilized remains belong to Cosmopolitodus hastalis – an extinct mackerel shark closely related to the modern great ...

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 ...