Oldest Known Lichen Fossils Found in South China

Lichens are believed to play a pioneering role in transforming the earth surface when they appeared on land hundreds of million years ago, paving the way for the evolution of terrestrial plants and animals. But most habitats where lichens dominate,such as tundra, mountains, and deserts, have a very low chance of preserving fossils. Until recently the earliest known lichen fossils were discovered in 1995 by Thomas N.Taylor, a University of Kansas researcher, from 400 million-year old deposits in Scotland.     

Oldest Peach Fossil Found in Yunnan

<正>Prunus persica(peach)is an economically important deciduous tree in the Rosaceae family that produces20 million tons of fruit per year.China has a long history of peach cultivation known from both historical and archaeological evidences.So far.the oldest evidence for the     

Oldest Known Bilaterian Fossils Brought to Light

Scientists recently discovered the earliest known evidence of bilateral animals (Vernanimalcula guizhouena) from the 580-600-millionyear-old Doushantuo Formation in Weng‘an County of southwest China‘s Guizhou Province.     

Oldest Yet T. rex Found in China

A three-meter long carni- vore living around 160 million years ago has been identified as the earliest known member of the fierce Tyr- annosaurus rex (T. rex) family, Chinese and U.S. scientists re- ported recently. The finding, filling a big blank about …     

Oldest yet Well-preserved Primate Fossil Discovered

The discovery of the oldest well-preserved fossil ever made in Asia throws new light on our understandings of their origin and evolution.     

The Most Primitive Bird Ever Found in China

The lacustrine deposits in the Early Cretaceous JeholGroup in northeast China's Liaoning Province is a treasure house for paleontological studies.Recently, CAS scientists made new significant discoveries there: fossils of a new avian species.     

Mystery of Oldest Objects in Solar System Unveiled

Opaque assemblages (OAs) were once thought to be “the oldest objects in the solar system.” After careful studies of OAs in primitive meteorites, a group of Chinese and US scientists have recently found that this is not the case. The scientists speculate…     

极大极小模型下开放式基金的最优投资组合

基于开放式基金的特征,运用极大极小模型分析了在不存在无风险资产情况下的开放式基金的最优投资组合,得出了最优解的解析解.     

Glial Synapses Found Plastic

Traditionally regarded as merely padding and supportive, glia, small cells that dramatically outnumber their larger neighbors, neurons, may play an essential role in information processing in the brain.     

中国信息主管（CIO）组织构架

勾画了成立我国CIO组织的必要性、组织的宗旨、组织结构、面临的任务等，主要目的是为了推动CIO在我国企业和政府机构里尽快成熟起来，以此来促进生产力的发展，并导致生产关系为适应生产力的发展得到进一步的改善。     

Compounds Found Effective Against SARS Virus

A study by the CAS Shang-hai Institutes for BiologicalSciences (SIBS) leading tothe discovery of a dozen of effec-tual compounds against SARS viruswas praised on May 24 as anothermajor progress in the wake of SIBSsuccessful efforts on protein expres-sion of SARS virus by CAS Presi-dent Lu Yongxiang.The progress is achieved byJiang Hualiang, Shen Xu, ShenJianhua, Luo Xiaomin and ZuoJianping of the CAS Shanghai Insti-tute of Materia Medica, a SIBSsubordinate, in cooperation w…     

墨子最早发现摄影原理

中国古代经典著作《墨经》记载了我国著名的思想家墨子讲述的８条光学原理，其中有一条是针孔投影成像原理，这就是发明照相机的原理。墨子研究光学原理，比外国人公认的光学鼻祖欧几里德早了１００多年。我国另一部经典名著《史记》，记载了墨子如何进行针孔投影成像的故事：齐国国王由于最心爱的王妃病故而忧心如焚、相思成疾，终日茶饭不思，昏昏欲睡，不理朝政。墨子便在一间黑暗的屋子里挂起一幅宽大的黑色幕布，在幕布的中间穿了一个小孔，仿照王妃生前的形象，剪了一个纸人，利用光线的反射作用，通过针孔，将纸人形象送进帷幕后面的…     

Study Reveals Highest Known Glacial Refugee for Fish

<正>The advances and retreats of glaciations through the Pleistocene,especially most recent the Last Glacial Maximum(19-26 thousand years ago),have significantly affected the demographic history,abundance and distribution pattern of modern species.During these glaciations,many species were excluded from large parts of their ranges and forced into refugia by the expanding ice sheets,followed by recolonization     

国家自然科学基金投入与论著产出的初步分析

本对国家自然科学基金委员会１９９１年－１９９６年面上项目成果统计内容里的项目完成论情况进行的统计分析,得出了国家自然科学基金１９９１－１９９６年度的投入和项目论攻数目的增长趋势;并根据一元线性回归方法对国家自然科学基金的投入分别与各种类型论的情况进行了分析,初步探讨了国家自然科学基金投入的才长与项目论产出的关系。     

Bats Found to Carry SARS-like Virus

An international consortium headed by CAS researchers has identified that the Chinese horseshoe bat is healthy carriers of a virus that is very closely related to those causing SARS(severe acute respiratory syndrome). Their work was reported online on Sept. 29 by the Science magazine. The finding supports an independent study with similar results by Hong Kong scientists,which is reported by the Sept. 27issue of Proceedings of the National Academy of Sciences.     

Ozone Minihole Found over Tibetan Plateau

Through a comprehensive analysis, researchers from the CAS Institute of Atmospheric Physics (IAP) discovered an ozone minihole, a large area with the lowest total ozone column (TOC, see figure), over the Qinghai-Tibet Plateau from Dec. 14 to 17, 2003.     

浙江黄岩晚侏罗世硅化木的发现与研究

本文介绍了在我国浙江黄岩市首次发现上侏罗纪西山头组（J3x）地层中的硅化木。硅化木位于黄岩城西南约12km的大魏头山的火山岩地区,具体岩性为英安质晶屑玻屑凝灰岩,硅化木顺层呈似层状、透状、镶嵌状,平卧在凝灰岩层中,它与浙江新昌发现的硅化木有着重大区别。（1）前者产出层位是陆相火山爆发相的凝灰岩,后者是河湖相沉积岩;（2）前者是晚侏罗世,后者是早白垩世,前者要比后者早5～6千万年;（3）前者成因机理相对复杂。黄岩硅化木的发现为侏罗世时期大型植物化石提供了新材料,对这一时期地层古生物、古生态研究提供了重要实物证据,为侏罗世地质研究提供了基础。