A small team of researchers from Switzerland, the U.S., Italy and Peru reports evidence that suggests ancestors of modern sperm whales were used as fat sources by ancient sharks. In their paper published in Proceedings of the Royal Society B, the group describes their study of physeteroid fossil bones dated to the late Miocene and found in Peru, and what it showed them about the feeding habits of ancient sharks.
Click here for original story, Bite marks on ancient sperm whale relatives suggest sharks used them as fat sources
Source: Phys.org