Some facts are too terrifying to teach in school. Unfortunately, Cracked.com is more than happy to fill you in with this hilarious tome of trivia.

• A zombie apocalypse? It could happen. 50% of humans are infected with a parasite that can take over your brain.
• The FDA wouldn't let you eat bugs, right? Actually, you might want to put down those jelly beans. And that apple. And that strawberry yogurt.
• Think dolphins are our friends? Then these sex-crazed thrill killers of the sea have you right where they want you.
• The most important discovery in the history of genetics? Francis Crick came up with it while on LSD.
• Think you're going to choose whether or not to buy this book? Scientists say your brain secretly makes all your decisions 10 seconds before you even know what they are.

If you’re a fan of The Oatmeal or Frak.com and hate being wrong about stuff, you’ll love what you find in You Might Be a Zombie from the twisted minds at Cracked.