Newscientist
Science and technology news from the weekly magazine includes daily updates from around the world. Includes Hot Topics, interviews, book reviews and job listings.
http://Newscientist.com/百度权重：
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收录时间：2025-05-23Esri
Offers free software, online mapping and GIS training, demos, data, product and service information, user scripts, and related information. Makers of ArcView, ArcGIS and ArcIMS.
http://Esri.com/百度权重：
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收录时间：2025-05-23Citeseerx.ist.psu
Scientific literature digital library and search engine.
http://Citeseerx.ist.psu.edu/百度权重：
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收录时间：2025-05-23Aleks
Provides a complete web based educational environment for K-12 and Higher Education mathematics science, statistics, and business.
http://Aleks.com/百度权重：
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收录时间：2025-05-23localbitcoins
A directory of local buyers and sellers of Bitcoins. Lists the traders closest to your current location.
http://localbitcoins.com/百度权重：
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收录时间：2025-05-22Metric-conversions
Provides free online conversion tools, which can be added to any websites. It also offers metric conversion tables for download and print.
http://Metric-conversions.org/百度权重：
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收录时间：2025-05-15Phys
Customizable source for current news in physics, technology, space, and earth science topics. Includes a weblog.
http://Phys.org/百度权重：
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收录时间：2025-05-23News.nationalgeographic
Offers daily news from several areas of science and technology.
http://News.nationalgeographic.com/百度权重：
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收录时间：2025-05-21Sigmaaldrich
Manufacturer of laboratory reagents in all fields of life sciences, including biochemistry, molecular biology, cell culture and cell biology.
http://Sigmaaldrich.com/百度权重：
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收录时间：2025-05-20Sciencealert
Science news & entertainment for a new generation of knowledge lovers.
http://Sciencealert.com/百度权重：
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收录时间：2025-05-15
