Wbsites for enhancing general knowledge?

Interesting topic! Are you a fan of random knowledge? There are some awesome sites out there for learning about anything and everything! I'll post them here for you and hope they help you. Your question made me curious as to whether you are applying to a game show of some sort or just interested in learning as much as possible! I'll be interested to hear back on this! about.com ehow.com howstuffworks.com wikipedia.com