Sharks have roamed the open seas for close to half a billion years and have witnessed the Earth’s evolution from a primordial ...

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

Sharks ruled the earth's oceans for 400 million years ... The Neogene, from 2.6 to 23.5 million years ago, was a time of immense change in biodiversity because of changing climates.