Grolier Online
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http://go.grolier.com/
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Smithsonian Institution
American heritage and history repository dedicated to promoting innovation, research, and discovery in science.
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AllExperts Questions & Answers
About AllExperts: expert guidance from real people helping to answer your questions ... Allexperts.com is the oldest & largest free Q&A service on the Internet. ...
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BiologyBrowser.org
Produced by BIOSIS, it offers resources and links for the life sciences information community. Browse the directory by organism, scientific subject, or geography.
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Resources by Subject
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US NSF - National Science Foundation
Independent U.S. government agency responsible for promoting science and engineering through programs that invest money in research and education projects in science and engineering.
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奇迹文库:开放的知识库
qiji.cn. arxiv.org. answers.com ... qiji.cn. arxiv.org. answers.com. 豆瓣小组: 奇迹 奇迹翻译计划 自然科学史. 集智俱乐部. 百科资料: 医疗 饮食 理财 旅游 艺术 历史 文学 军事 生活 科学 ...
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Life's Little Mysteries - A Daily Investigation of the World Around You
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RePEc: Research Papers in Economics
International collaborative effort to enhance the dissemination of research in economics. ... To contact us: email repec@repec.org. Recent activity ...
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Galaxy of Knowledge | Smithsonian Institution Libraries
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Kids' Games, Animals, Photos, Stories, and More -- National Geographic Kids
Children's version of National Geographic, including current events and news stories about animals, geography, the Earth, and more. Find games, activities, experiments, homework help, kids news, and more.
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