An international team of researchers has examined bite marks on several seven-million-year-old skulls from extinct whales, ...

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 ...

Forest veterinary doctors who conducted the necropsy have collected samples of heart and muscle for a detailed ...