He is part of a group of 26 shark experts who aim to set the record straight with a new study. According to Underwood, Cooper ...

Acanthodians are not at all shark-like in shape, for example they have diamond-shaped scales and spines in front of all the fins,' says Emma. 'But they do have a cartilage skeleton, a shark-like skull ...

The exact number varies depending on the species. The only part of a shark's skeleton not made of cartilage is their teeth, which they're famous for. Since cartilage is softer than bone and teeth, it ...