Image Gallery

Photo by Mike Hettwer, courtesy National Geographic

Paleontologist Paul Sereno with his Saharan discoveries — SuperCroc, BoarCroc (upper right), PancakeCroc (lower right), RatCroc, DogCroc and DuckCroc. The fossil crocs were unearthed in a series of expeditions to the Sahara beginning in 2000.