In his Cool Tools newsletter, Kevin Kelly wrote about a series of books, called Corliss Sourcebooks. They sound like "Ripley's Believe it or Not" for grown ups. I'm tempted to buy the whole lot.
For most of us this remarkable series of volumes will be a constant source of wonder, amazement, and re-thinking. Because each observation is offered without explanation ("just the facts ma'am") in such volume (thousands and thousands), one quickly realizes the extent of our ignorance. So far Corliss has compiled 34 volumes, all items indexed according to his classification scheme. Confusingly these volumes overlap, and it is not easy to determine which are the latest, but those in his "catalog" series seem to be the most recent.