One kind of resource, specifically, is the science encyclopedia.
I include technology encyclopedia sources in this musing, as well, for of course science and technology (speaking of the net) are not mutually exclusive.
Here’s what we have access to for no charge, for example: One science encyclopedia that is also a technology encyclopedia is AllRefer (at allrefer .com).
This source is organized by subset, or discipline (astronomy, Biology, etc.), and at the same time offers the general search tool.
[This site has one maddening flaw: it uses those %$#%*&%## pop-up ads. So start clicking X buttons.]
Eric Weisstein offers a comprehensive science encyclopedia that not only does NOT use pop-ups and does provide sciences by discipline or branch, this science encyclopedia includes numerous biographies of great thinkers; a mathematics section; a physics section; and a section for astronomy.
The site is easily navigated and quite lovely on the eyes, with its crisp but minimally distributed graphics, etc.
It is always most wise to use a science encyclopedia or any educational, intellectual, or informational source that is designed, created, and maintained by a reputable higher learning institution.
That said, check out CogNet, the “Brain Sciences Connection,” implemented by MIT; or the Encyclopedia of Nonlinear Science, offered by Routledge, for example.
There is also the science encyclopedia at Education.
Com, just as there are subscriber sites and pay services, such as DiscoverThis.
Com and others, willing to take your money for access to their sites or for published texts on sale.
But many schools and institutes, and many more scientists and professors of the discipline, offer free access to their science encyclopedia sites.
In the same respect, one of the best technology encyclopedias, which can get away with what many try but only they can prove when they say they are the “#1 online encyclopedia dedicated to computer technology, is Webopedia.
It offers a definition, visual aids, and, as the Internet was designed to do, they link words within the definition…for don’t you hate it when you look up a word or phrase and then have to look up the denotative explanation words, too? So dig deep, or as they say with regards to net-searching, drill down…further than the topmost sedimentary layer of the greatest of human artifacts—the worldwide web.
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