The frilled shark is one of the oldest and strangest predators still alive, surviving in deep ocean waters with a body plan that has barely changed for tens of millions of years . Its eel-like body, ...

Shark teeth are everywhere once people start noticing them. They turn up in fossil shops, washed along beaches, buried inside ...

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 weapons at risk.

This is read by an automated voice. Please report any issues or inconsistencies here. PORTLAND, Maine — Sharks are the most feared predators in the sea, and their survival hinges on fearsome teeth ...