A look at a true "living fossil." The Chambered Nautilus is a cephalopod that has survived, relatively unchanged, for over 500 million years, predating most dinosaurs by hundreds of millions of years. It navigates the ocean depths using its unique, chambered shell as a buoyancy device, much like a submarine. These incredible creatures are a direct link to the ancient oceans of our planet. #Nautilus #livingfossil #paleontology #marinebiology #cephalopod #sciencefacts | All Creatures: The Learning

Chambered nautilus - Alchetron, The Free Social Encyclopedia