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The article offers information on the drilling project at the Songliao Basin in northeastern China, which is initiated to study rocks which geologists need in order to understand the Cretaceous period. It says that Cretaceous period was the time where dinosaurs lived and global temperatures reached extreme levels. It mentions that oxygen and carbon isotopes found in the crustacean shells fossils were analyzed. It mentions that Wang Chengshan is the lead principal investigator of the project.