Are shark teeth bone or cartilage? Understanding the body composition of the ocean's apex predator Sharks are not mammals; they are fish. Some sharks give birth by laying eggs, while others give ...

Their skeletons are made of cartilage - the same soft, flexible stuff as your ears and the tip of your nose are made of. This is true for all sharks, from the formidable great white to the gentle ...

Because this monstrous shark was a fish made mainly of cartilage, its huge teeth were its only artifacts. This video explores how scientists use teeth to determine the size of sharks – from the ...