Did You Know?: A collection of the most interesting facts, stories and trivia...ever!

• Your pupils dilate when you're looking at someone you love.
• Octopuses are older than dinosaurs.
• Caffeine withdrawal is officially a mental disorder.
• The only breed of dog to be mentioned by name in the Bible is the greyhound.
• Your heart is so powerful that it can squirt blood 30 feet across the room.
• Dr. Seuss's first book was rejected 27 times.

From the popular Tumblr blog and Facebook page with over 6M fans, comes a collection of the most interesting facts, stories and trivia...ever!

Learn about topics ranging from the highly scientific to the uproariously funny, while checking out 50 beautiful, original illustrations!

If you love books like Now I Know, Ripley's Believe It or Not, and Uncle John's Bathroom Reader, Did You Know is the perfect book to make you smarter or just liven up your day.