Just a brief rant about the Wikipedia conundrum. It would be an even better source of knowledge and learning if all the links to all the science were left in each articles links section. One reason I started this blog was to be able to put all my science links in one place, and have them stay there. Along with enough information to know what the article or page said about something.
(edit August 2014)
I started my own Wikipedia, it was easier than complaining about missing articles and the lack of science.