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Paul Sereno: You're looking at an animal that is a cross between a boar and a crocodile. Never doubt the creativity of evolution!

You are listening to Paul Sereno, a paleontologist at the University of Chicago. At a 2009 science meeting, he showed me the unusual fossil that his team unearthed in a remote region of the Sahara Desert. [---1---]

Paul Sereno: [---2---] At the front end of the skull, it's got sort, kind of got a stub nose and a horny covering as if it was ramming itself forward in some way — [---3---]

This "boar-croc", said Sereno, is a relative of the modern crocodile, and lived in the African Sahara 90 million years ago, in an area which, back then, was a lush riverway.

Paul Sereno: The unusual features that we see in the boar-croc and all the other strange crocodilians — sometimes they are walking upright, sometimes they are eating plants — is because the crocodilians then were more than they are now, evolutionarily speaking. [---4---] So where you have an animal with fangs, it comes up, it's pretty quick. It can take down a fairly large animal — you might think of a lion, or you might think of a hyena, something that can crunch through bone. This was the animal — there were no hyenas and lions at that time.

【視聽版科學小組榮譽出品】
Sereno said he'd never found anything quite like it. Some of the features that we see in the skull that we've never seen before in a crocodilian are two horns coming out the back of the skull. and then the outstanding feature are the three sets of fangs going up and down. They were playing the roles that mammals are playing today in some of these environments.