Does the human body contain gold? Can eating spinach really make you stronger? Quench your curiosity with the fascinating facts behind every-day mysteries. How do oysters make pearls? What's the difference between a fruit and a vegetable? Why do giraffes have a long neck? Why do we get wrinkles as we get older? Every snowflake is unique! Why do we have wax in our ears? Why do we have lines on the palms of our hands? Why do some people have freckles? Why do you blush when you're embarassed? How do spiders make webs? High heels were invented for men! Why does helium make your voice high?