University of Chicago paleontologist Paul Sereno displays a model of the head of Rugops primus wrinkle-faced meat-eating dinosaur June 1, 2004 at the Garfield Park Conservatory in Chicago, Illinois. Serano led a team which discovered the 95 million-year-old fossil in Africa. (Scott Olson/Getty Images)
Evidence of a green Sahara
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On a recent dinosaur dig in Africa, paleontologists found evidence of lush vegetation and a thriving community of ancient people in what is now the Sahara Desert.
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Paul Sereno: is a paleontologist at the University of Chicago.
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