probably wikipedia is the best.
Go to Clubpenguinsworld.wikispaces.com This site has really good info!!
http://www.brainrules.net
it is actually a very good site, especcialy if you want info
Because it is very good for getting info that you need to know
Some good info search engines are Answers.com WikiAnswers.com Ask.com Wikipedia.org Yahoo.com Google.com Bing.com And, well, this site!
Here is a good info site http://roborovskihamsters.webs.com/inthewild.htm
A really good site with loads of info and things to do is ronanparkemusic.bpe.x10.mx/wp
A good place to find science info would ofcourse be an encylopedia type site such as en.wikipedia.org. Even a site like www.pubmed.com would give you information on books related to medical or biological topics.
Well, Wiki is always a good one. But if your one of those who never trusts Wiki then try... For the Basic Info. : For a bit more detail try this:
http://www.savetheguns.com/firearms_101.htm - As good as any place to start...
50states.com
Depends on what you are looking for, if you just want a site that gives info on pretty much anything you want, then I suggest wikipedia, theres a search box on that site that allows you to search anything you. Another site is this site, just ask questions and you will soon get them answered. Also just search on google for whatever you want to know, google is a good info site. This is all I know sorry if this answer disappoints you. Youtube is also a great website for instructional videos etc.