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About the Cover


This oviraptorid embryo from Ukhaa Tolgod, Mongolia, in the Gobi Desert is the first definitive embryo of a nonavian theropod dinosaur. It is a near-hatchling, curled in a fetal position. In the upper left is an eggshell fragment showing the outer surface of the egg, and in the upper right is a skull of a juvenile dromaeosaur that was found associated with the oviraptorid nest. See page 779 and the News story on page 731. [Photo: Michael Ellison, Department of Vertebrate Paleontology, American Museum of Natural History]


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Science. ISSN 0036-8075 (print), 1095-9203 (online)