Did you know that there are one million earthworms in an acre of soil, or that an average American eats 10 pounds of marshmallows in a year? Did you know that the act of yawning and stretching at the same time is known as pandiculation?

These facts, and hundreds more in a wide variety of subjects including history, science, sports, music and more, make Hmm...I Did Not Know That a must read for trivia buffs and fact fanatics.

• The Book of Useless Knowledge
• 1000+ fun facts
• Amazing, Interesting Facts You Probably Didn't Know
• Answers to Rhetorical Questions
• The Mega Book of Useless Information: An Official Usless Information Society Publication