>>Almost everything paleontologists know about ancient sharks comes from their teeth. That’s because the animals had skeletons made of cartilage, which does not fossilize as easily as bone. So researchers were surprised to find several shark skulls and an almost complete skeleton of 360-million-year-old primitive shark in the Atlas Mountains of Morocco.<<

>>This isn’t the only rare shark fossil rewriting what we know about ancient sharks. Last month, researchers from the University of Chicago made a CT scan of a 2-foot-long, 335-million-year-old shark found in Scotland in 1837. They found that the early shark was a suction feeder, using mouth parts in a manner similar to modern day nurse-sharks and carp.<<

https://www.smithsonianmag.com/smart-news/ancient-shark-looked-eel-and-swallowed-its-prey-whole-180973272/

PermeateFree said:

>>Almost everything paleontologists know about ancient sharks comes from their teeth. That’s because the animals had skeletons made of cartilage, which does not fossilize as easily as bone. So researchers were surprised to find several shark skulls and an almost complete skeleton of 360-million-year-old primitive shark in the Atlas Mountains of Morocco.<<

>>This isn’t the only rare shark fossil rewriting what we know about ancient sharks. Last month, researchers from the University of Chicago made a CT scan of a 2-foot-long, 335-million-year-old shark found in Scotland in 1837. They found that the early shark was a suction feeder, using mouth parts in a manner similar to modern day nurse-sharks and carp.<<

https://www.smithsonianmag.com/smart-news/ancient-shark-looked-eel-and-swallowed-its-prey-whole-180973272/

Bleedin’ marvellous.