(Close-up of a shark with sharp teeth. Credit: GIOVANNI NITTI / Shutterstock.) Shark teeth are a marvel of evolution. They are so sharp that many island cultures once used them as weapons and tools to ...

Very close look at a Great Whites teeth as she bumps the camera #shorts . . 💙💙💙 follow @whitesharkocean 🦈🦈🦈 all ...

PHOENIX — Just when you thought it was safe to go back to northern Arizona comes word that sharks used to roam around Flagstaff. It was a long, long time ago. “[About] 260 million years ago, there was ...

STANFORD, Calif. (KGO) -- If you ever come face-to-face with the wrong kind of shark, there's something you probably want to avoid. Just a hint: they're long and really sharp. But now, researchers at ...

NARRAGANSETT, R.I. (WPRI) — The Atlantic Shark Institute is asking beachgoers for assistance searching for fossilized shark teeth. Jon Dodd, executive director of the Atlantic Shark Institute, told 12 ...

WRIGHTSVILLE BEACH, North Carolina -- The North Carolina coast is known for many things but, for divers, it is well known as a hot spot for finding giant prehistoric Megalodon teeth. "It's really rare ...

PORTLAND, Maine — Sharks are the most feared predators in the sea, and their survival hinges on fearsome teeth that regrow throughout their lives. But changes in the ocean's chemistry could put those ...