Paul Sereno with Six Crocs (IMAGE) National Geographic Society Caption 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, supported by the National Geographic Society. Credit Photo by Mike Hettwer, courtesy National Geographic Usage Restrictions IMAGES ARE FOR YOUR ONE-TIME EXCLUSIVE USE ONLY AS A TIE-IN WITH THE NATIONAL GEOGRAPHIC License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.