网站简介：To help engineer and technical communicators develop skills in written and oral presentation.
网站简介：Primary professional organization for chemists and related occupations.
网站简介：This site explains the latest research on the planet, from human biology to the animal world and the forces of nature.
网站简介：An accredited university offering bachelor's, master's, and doctoral degrees in over 150 fields of study in Boulder, Colorado.
网站简介：Blockchain.info is a utility site for the e-currency Bitcoin. The site allows you to browse the bitcoin blockchain, view currency statistics and offers a free web based online wallet.
网站简介：A US exchange trading in numerous virtual currencies, including Bitcoin, Ethereum, Litecoin and Dogecoin.
网站简介：Weather, climate and hydrology services; also details educational projects, publications, and contacts.
网站简介：Informative articles on automotive technology, car parts, do it yourself repair, and used cars.
网站简介：International weekly science journal, published by the American Association for the Advancement of Science (AAAS).
网站简介：Site has many information resources and links on agricultural topics, as well as hunger, sustainable development, and related matters.
网站简介：U.S. operations for the makers of Mathematica, a fully integrated technical computing software package, Wolfram|Alpha, and other programs. Includes online ordering and company information.
网站简介：Monthly magazine of science. Website includes articles from past issues.
网站简介：Scientific agency for natural sciences, including earth science and biology. Extensive information on U.S. water, biological, energy, and mineral resources, USGS programs, and natural disasters and hazards.
网站简介：Enhancing the quality of life for the American people by supporting production of agriculture.
网站简介：Detailed weather and forecast information around the globe. Features include surface maps, charts, satellite imagery, and recreational outlooks.
网站简介：The main Bitcoin discussion forum, includes subforums for technical support, mining, development and economics.
网站简介：ScienceDaily features breaking news and videos about the latest discoveries in science, health, the environment, technology, and more -- from major news services and leading universities, scientific journals, and research organizations.
网站简介：Science news & entertainment for a new generation of knowledge lovers.
网站简介：The RSC is the largest organisation in Europe for advancing the chemical sciences. Supported by a worldwide network of members and an international publishing business, its activities span education, conferences, science policy and the promotion of chemistry to the public.
网站简介：A directory of local buyers and sellers of Bitcoins. Lists the traders closest to your current location.
网站简介：Features space and science news stories, interactive games, questions and answers, contests, kids' submissions, and weekly polls.
网站简介：Manufacturer of laboratory reagents in all fields of life sciences, including biochemistry, molecular biology, cell culture and cell biology.
网站简介：Ranking of cryptocurrency and assets by market cap. Details and chart for each currency.
网站简介：Official site, with extensive information on America's National Parks and their management.
网站简介：Bitcoin micro-payment processor which provides webmasters and developers free crypto-currency faucet scripts, and allows faucet users to collect bitcoins and get paid in bulk without any fees.