Welcome to your body! -- Can you catch a cold in the cold? -- Are there butterflies in my tummy? -- Why do I get wrinkly when I'm wet? -- Are yawns contagious? -- Why do we have baby teeth? -- Is it green ... or is it red? -- Can you hiccup forever? -- Could you never sleep again? -- Can double-jointed people bend too far? -- Where do different eye colors come from? -- Can people squirt liquid in their mouth out of their eye? -- Can your heart actually break? -- What is a placebo? -- Are all of our body parts essential? -- Have I seen you before? -- Why can't I have curly hair? -- Why does cilantro taste like soap? -- Can you teach yourself to be ambidextrous? -- Does everybody feel pain? -- Do brains really freeze?