Take a free-form trip though the human body with these humorous riddle poems. Which body part, if spread out flat, would cover a tennis court? Stretched end to end, which body parts would wrap four times around the equator? What’s the hardest substance in the human body? In these pages you will discover the astonishing answers to these questions —and many more! Put your cerebral cortex to work. Follow the anatomical, poetic, and visual clues to make a guess, then read the science notes to check your powers of riddle reasoning. You’ll even find hints from the greatest poet of them all —William Shakespeare!