What Causes Your Stomach To "Growl" When You're Hungry? Acid secretion Gas buildup Intestinal contractions Liver activity Did You Know! The liver can regrow itself — and pretty fast. Fact:…

Which Ancient Civilization Used Crushed Mouse Brains As Toothpaste? Greeks Chinese Egyptians Romans Did You Know! The stomach gets a new lining every few days — or it would digest…

Which Natural Bodily Function Produces Nitric Oxide? Sneezing Yawning Nose breathing Swallowing Did You Know! You remember emotional tone, not words. Memory distorts facts but preserves feelings. When recalling conversations…

Which Body Part Can Detect Umami Taste? Back of tongue Roof of mouth Cheeks Tonsils Did You Know! Your brain “fills in” most of your reality. Your visual perception is…

What Ancient Practice Involved Drilling Into The Skull To Treat Illness? Acupuncture Trepanation Leeching Moxibustion Did You Know! The “Ben Franklin Effect”: Helping someone makes you like them more. Instead…

Which Organ Can Survive The Longest Outside The Body For Transplant? Liver Kidney Heart Lungs Did You Know! Your small intestine is not so small — it’s over 20 feet…

What Weird Side Effect Can Eating Too Many Carrots Cause? Nosebleeds Hallucinations Dry eyes Orange skin Did You Know! You produce up to 7 liters of gas daily — and…

What Gives Urine Its Yellow Color? Iron Creatinine Urobilin Bilirubin Did You Know! Your stomach can “see” light – sort of. Deep in your gut lining are photoreceptor proteins, like…

What Common Fruit Can Help Whiten Teeth? Apple Banana Strawberry Mango Did You Know! You’re always using muscles — even when you’re sleeping. Even in deep sleep, muscles are at…