I'm a big fan of Wikipedia. It's both informative and entertaining. Of course, only a fool would use it uncritically. But where else would you find articles on quantum computing, kings of Poland, the club sandwich, and Finnish heavy metal bands?
The fact that Wikipedia can be edited by anyone is both a blessing and a curse... Which is how you can end up with an article on Finnish heavy metal band Heavy Metal Perse which includes the following line:
While their name in English might be viewed as "Heavy Metal Per Se", in Finnish it has no specific meaning, except for the word "perse" meaning "ass".