Researchers used powerful technology to analyse thousands of individual cells at once, considering which genes are active.

‘Being light and more flexible than bone, cartilage means sharks can typically swim faster than bony fish.’ Cartilage is about half as ... some species of shark a powerful bite. Their upper jaw is not ...

Early jawless fish were likely to have used bony projections ... together the early evolution of vertebrates, and different ...

the first jawed fish, in the fossil record around 460 million years ago. And there at the back of the jaw there is that bone, the hyomandibula, supporting the rear of the jaw. Then, around 400 ...