十万个冷笑话2Chinese scientists find 11 embryos in 244-million-year-old ichthyosaur Mixosaurus fossil, giving clue to reproduction of ancient marine reptile_我的网站
一 |  Chinese scientists studying a 244-million-year-old ichthyosaur Mixosaurus fossil from Southwest China’s Guizhou Province found at least 11 embryos inside the specimen. The discovery sets a new record for the highest number of embryos found in ichthyosaur lineages and reveals that high reproductive capacity in ichthyosaurs emerged earlier than previously believed, chinanews.com reported on Wednesday. Ichthyosaur was among the most successful Mesozoic marine reptiles, and its reproductive strategy was considered crucial to their adaptation to ocean environments. Its reproductive ability before extinction has long intrigued paleontologists. A joint research team from the Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences (CAS), and the Zhejiang Museum of Natural History, has published the study on the ichthyosaur paleontology in the international journal PeerJ. According to Wang Wei, the paper’s corresponding author and an associate professor at the institute, embryo-preserving ichthyosaur fossils have been found across 11 genera from the Early Triassic to the Early Cretaceous. However, for ichthyosaur groups that diverged in the Early Triassic, embryo-bearing fossils known to scientists remain scarce, and knowledge about the number of offspring they carried is especially limited. Previous discoveries of pregnant specimens, such as Chaohusaurus and Mixosaurus, contained no more than three embryos, suggesting limited early reproductive capacity among early ichthyosaurs. According to Gu Shengxiao, the paper’s first author and a researcher at the Zhejiang Museum of Natural History, the study examined an almost complete adult Mixosaurus panxianensis fossil from Guizhou’s Middle Triassic strata, dating back about 244 million years. The specimen measures 112 centimeters long, including a skull length of 22 centimeters, with only the tail tip missing. The researchers identified 11 fetal ichthyosaur skeletons with skulls inside the adult specimen’s abdomen, confirming they were embryos rather than cannibalized prey based on their position and morphology. There are also fossil pieces outside the belly of the adult, which could belong to the 11 or represent other embryos. All embryos in the Mixosaurus panxianensis fossil were at a similar late developmental stage, suggesting the mother died shortly before giving birth, according to the researchers. The Mixosaurus panxianensis fossil containing at least 11 embryos sets a record for Triassic ichthyosaurs and all known ichthyosaur species. The researchers believe this indicates that Mixosaurus may have adopted a reproductive strategy of producing large numbers of offspring in a single birth. This exceptionally high reproductive capacity may have provided them with a survival advantage. Among Triassic ichthyosaurs and all known ichthyosaur groups, Mixosaurus is the genus with the largest number of fossil specimens and is also one of the most widely distributed ichthyosaurs. The researchers said the multi-embryo Mixosaurus panxianensis fossil may represent an extreme case, but it confirms the species’ ability to produce large numbers of offspring, potentially contributing to its dominance among contemporaneous marine reptiles. The study offers the first fossil evidence of high fertility in Triassic ichthyosaurs. Future research will examine other embryo-bearing Triassic ichthyosaurs to determine whether a multiple-offspring reproductive strategy was common in early ichthyosaur evolution and what factors drove this trait, Wang said. Global Times 。 东北社理会推出流动健康车，将医疗必需品和更健康的食品送入社区。（图：东北社理会）东北社区发展理事会推出流动健康车，将医疗必需品和更健康的食品送入社区，方便行动不便或经济拮据的居民获取所需的物品。这个计划为期一年，预计能让超过1500名来自弱势家庭的年长者受惠。流动健康车会把成人纸尿片、牛奶、膏药布等物品运送到社区内交通便利的地点，让有需要的居民免费领取。这项计划率先在淡滨尼集选区开跑，之后流动健康车会前往阿裕尼、白沙-榜鹅和盛港集选区。东北社理会是在刷新计划的活动上，为流动健康车主持推介仪式。（图：东北社理会）东北社理会是在刷新计划（Project Refresh）的活动上，为流动健康车主持推介仪式。东北区市长朱倍庆说，他们是在非营利组织好人好事和赞助商Geoscan的帮助下，推出这项计划。
二 | 他说：“整个活动，不包括健康车和人力费用，大概是15万元，赞助商捐了7万5000元，东北社理会也出7万5000元。
三 | 15万元可以用来买健康用品，像是纸尿片、奶粉等等。这个成人尿片、牛奶等的价格都上涨了，年长者在经济上比较吃紧一点，而且这些很多年长者就觉得要去这个购物市场买这些用品再带回家是非常难的。在淡滨尼我们就选了五个点,让居民来拿这些物品。有些居民还是会觉得比较难把物品拿回家，我们还是会有志愿者帮忙他们。”今年有超过1000名义工参与刷新计划。（图：东北社理会）91岁的曾干春是受益者之一。由于他行动不便，因此很难买到自己所需要的物品。流动健康车将这些用品送到他住家附近后，就方便他获取这些用品。
四 | 另一方面，今年有超过1000名义工参与刷新计划，在淡滨尼和阿裕尼集选区翻新115个住家，是计划自2016年推行以来，参与人数最多的一次。
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