Did Dinosaurs live in Cold Climates?

The Mesozoic has often been imagined to be a time of dense tropical swamp forests and unending tropical conditions, although in reality global temperatures varied across the Triassic, Jurassic and Cretaceous periods. Roughly 125 mya, for example, Northeastern China possessed a cool temperate climate that was cold enough to receive snow during the winter. As attested by the incredibly rich fossil finds uncovered in the region, dinosaurs thrived here all year round. #dinosaur #paleontology https://www.deviantart.com/drpolaris https://www.patreon.com/c/DrPolaris Sources used for this video: Amiot, R.; Wang, X.; Zhou, Z.; Xiaolin Wang, X.; Buffetaut, E.; Lécuyer, C.; Ding, Z.; Fluteau, F.; Hibino, T.; Kusuhashi, N.; Mo, J.; Suteethorn, V.; Yuanqing Wang, Y.; Xu, X.; Zhang, F. (2011). "Oxygen isotopes of East Asian dinosaurs reveal exceptionally cold Early Cretaceous climates". Proceedings of the National Academy of Sciences. 108 (13): 5179–5183. Cau, Andrea (2024). "A Unified Framework for Predatory Dinosaur Macroevolution" (PDF). Bollettino della Società Paleontologica Italiana. 63 (1): 1-19. Chang-fu Zhou; Wen-hao Wu; Toru Sekiya; Zhi-ming Dong (2018). "A new Titanosauriformes dinosaur from Jehol Biota of western Liaoning, China". Global Geology. 37 (2): 327–333. Gang Han; Luis M. Chiappe; Shu-An Ji; Michael Habib; Alan H. Turner; Anusuya Chinsamy; Xueling Liu & Lizhuo Han (15 July 2014). "A new raptorial dinosaur with exceptionally long feathering provides insights into dromaeosaurid flight performance". Nature Communications. 5, Article number: 4382: 4382. Hedrick, B. P.; Dodson, P. (2013). Evans, Alistair Robert (ed.). "Lujiatun Psittacosaurids: Understanding Individual and Taphonomic Variation Using 3D Geometric Morphometrics". PLOS ONE. 8 (8): e69265. Ji, Q.; Wu, X.; Cheng, Y.; Ten, F.; Ji, Y. (2016). "Fish-hunting ankylosaurs (Dinosauria, Ornithischia) from the Cretaceous of China". Journal of Geology. 40 (2): 183–190. Li, X.; Reisz, R. R. (May 10–13, 2019). The early Cretaceous ankylosaur Liaoningosaurus from Western Liaoning, China; Progress and problems. 7th Annual meeting Canadian Society of Vertebrate Palaeontology. pp. 31–32. Li, Quanguo; Clarke, Julia A.; Gao, Ke-Qin; Peteya, Jennifer A.; Shawkey, Matthew D. (2018-11-02). "Elaborate plumage patterning in a Cretaceous bird". PeerJ. 6: e5831. Lida Xing, Phil R. Bell, W. Scott Persons IV, Shuan Ji, Tetsuto Miyashita, Michael E. Burns, Qiang Ji, Philip J. Currie, 2012, "Abdominal Contents from Two Large Early Cretaceous Compsognathids (Dinosauria: Theropoda) Demonstrate Feeding on Confuciusornithids and Dromaeosaurids", PLoS ONE 7(8): e44012. Liu, Yong-Qing; Kuang, Hong-Wei; Jiang, Xiao-Jun; Peng, Nan; Xu, Huan; Sun, Hui-Yi (2012). "Timing of the earliest known feathered dinosaurs and transitional pterosaurs older than the Jehol Biota". Palaeogeography, Palaeoclimatology, Palaeoecology. 323–325: 1–12. Lü, Junchang; Brusatte, Stephen L. (2015). "A large, short-armed, winged dromaeosaurid (Dinosauria: Theropoda) from the Early Cretaceous of China and its implications for feather evolution". Scientific Reports. 5: Article number 11775. Meade, Luke E.; Ma, Waisum (22 February 2022). "Cranial muscle reconstructions quantify adaptation for high bite forces in Oviraptorosauria". Scientific Reports. 12 (1): 3010. Qin, Zuohuan; Xi, Dangpeng; Shi, Zhongye; Xu, Yankang; Wei, Feng; Yu, Zhiqiang; Wu, Baoxu; Wan, Xiaoqiao (2019). "Lagerstätte fossils from the Lower Cretaceous Yixian Formation of the Pingquan Basin, North China: Stratigraphical correlation and palaeoenvironmental implications". Lethaia. 52 (3): 335–349. Vinther, Jakob; Nicholls, Robert; Lautenschlager, Stephen; Pittman, Michael; Kaye, Thomas G.; Rayfield, Emily; Mayr, Gerard; Cuthill, Innes C. (2016). "3D Camouflage in an Ornithischian Dinosaur". Current Biology. 26 (18): 2456–2462. Wang, X.; You, H.; Meng, Q.; Gao, C.; Chang, X.; Liu, J. (2007). "Dongbeititan dongi, the first sauropod dinosaur from the Lower Cretaceous Jehol Group of western Liaoning Province, China". Acta Geologica Sinica (English Edition). 81 (6): 911–916. Wu, Huaichun; Zhang, Shihong; Jiang, Ganqing; Yang, Tianshui; Guo, Junhua; Li, Haiyan (2013). "Astrochronology for the Early Cretaceous Jehol Biota in Northeastern China". Palaeogeography, Palaeoclimatology, Palaeoecology. 385: 221–228. Xu, X.; Wang, K.; Zhang, K.; Ma, Q.; Xing, L.; Sullivan, C.; Hu, D.; Cheng, S.; Wang, S.; et al. (2012). "A gigantic feathered dinosaur from the Lower Cretaceous of China" (PDF). Nature. 484 (7392): 92–95. Yang, Yuqing; Wu, Wenhao; Dieudonné, Paul-Emile; Godefroit, Pascal (2020-09-08). "A new basal ornithopod dinosaur from the Lower Cretaceous of China". PeerJ. 8: e9832.