1 Natural Gas Research Institute of Shaanxi Yanchang Petroleum Group Co., Ltd., Xi’an, China 2 PetroChina Changqing Oilfield Company, Xi’an, China The core samples of this study were collected from ...

Now he’s suing. Martin Becker, an environmental science professor and paleontologist, has spent his career collecting Devonian Age marine invertebrate fossils, or ancient sea creatures that are about ...

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To understand the mechanisms by which the average complexity of crustaceans increased throughout the Phanerozoic, this article addresses ... tagmosis value has been quite consistent since the Devonian ...