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In this undated photo released by Project Exploration, Prof. Paul Sereno holds a plaque cast of two juvenile skeletons of the ostrich-mimic dinosaur sinornithomimus. In their rib cages are stomach stones and the carbonized remains of the last plants they consumed. The dinosaurs died when they were a little over one year in age.![Dinosaur Disaster]()
In this undated photo released by Project Exploration, the skull of an ostrich, left, is compared with a skull of the 90-million-year-old 'bird mimic' dinosaur sinornithomimus found in Inner Mongolia in China. Chinese and American scientists who found 25 fossils of ostrich-like sinornithomimus in China's Gobi Desert say they shed new light on dinosaur social behavior.![Dinosaur Disaster]()
In this undated photo released by Project Exploration, a plaque cast of the skeletons of two ostrich-mimic dinosaur sinornithomimus are seen. In their rib cages are stomach stones and the carbonized remains of the last plants they consumed. The dinosaurs died when they were a little over one year in age.![Dinosaur Disaster]()
May 2001: In this photo released by Project Exploration, Chinese dinosaur hunter Zhao Xijin, left, and University of Chicago Prof. Paul Sereno, right, compare fossil bones at the site of a buried dinosaur herd in the Gobi Desert of Inner Mongolia, China. Chinese and American scientists who found the 25 fossils of ostrich-like sinornithomimus in China's Gobi Desert say they shed new light on dinosaur social behavior.
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