Visitors observe the skeleton of Yuzhoupliosaurus, a special species of ichthyosaurus, in an exhibition held at the Zhejiang Museum of Natural History in Hangzhou, east China's Zhejiang Province, Dec. 20, 2009. Fossils and artificially restored specimens of the marine reptiles in the geological period of Triassic were displayed to visitors. (Xinhua/Zhu Yingwei)