According to NBC Washington, a Calvert County fossil hunter found a coffin and human skeleton appearing to be at least 100 ...

But they do have a cartilage skeleton, a shark-like skull and jaw, and at least some shark-like teeth, which were often fused together.' By the middle of the Devonian (380 million years ago), the ...

Since cartilage is softer than bone and teeth, it doesn’t fossilise very well ... As well as being flexible, their skeletal structure helps give some species of shark a powerful bite. Their upper jaw ...