Sharks have been evolving in Earth’s oceans for more than 450 million years, long before dinosaurs ever walked the planet. Throughout that vast history, they diversified into some of the strangest and ...

Deep beneath Kentucky’s rolling hills, in the dark reaches of Mammoth Cave National Park, paleontologists have unearthed the fossilized remains of two never-before-seen prehistoric shark species.

If current extinction trends continue, global shark populations will lose much of their variety, thereby threatening ecosystems where specialized species serve vital roles, researchers have found. In ...