You have heard of the Ford Model T, the famed early 20th-century automobile that was the forerunner of the modern car. But how about the Model T shark?
Scientists have announced the discovery of the impeccably preserved fossilized remains of a shark that lived 325 million years ago in what is now Arkansas, complete with a series of cartilage arches that supported its gills and jaws.
This primitive shark, named Ozarcus mapesae, may lead scientists to rethink shark evolution, erasing the notion that these beasts of the deep have remained little changed since they first appeared at least 420 million years ago.