How Much Of Your Body Is Water? 30% 50% 60% 80% Did You Know! Your appendix might not be useless — it may be a backup for gut bacteria. While…

What Color Are Bruises Before They Turn Blue? Red Purple Yellow Green Did You Know! Your Liver Can Regrow from Just 25% of Its Tissue It’s the only human organ…

Which Organ Controls Your Balance? Brain Inner ear Eyes Spine Did You Know! The Heart Has Its Own Electrical System—and Can Beat Outside the Body Known as the cardiac conduction…

What Vegetable Was Once Used As A Wound Antiseptic In WWII? Carrots Potatoes Onions Garlic Did You Know! Your Brain Can Store an Estimated 2.5 Petabytes of Data That’s the…

What Mineral Makes Your Bones Hard And Strong? Iron Zinc Magnesium Calcium Did You Know! Dead skin cells make up a surprising part of household dust. About 50% of the…

What Body Fluid Can Serve As A Painkiller? Saliva Blood Sweat Tears Did You Know! Your skin can “smell”—sort of. Skin cells have olfactory receptors, similar to those in your…

Which Body Fluid Has A Different Taste Depending On Diet? Blood Sweat Urine Mucus Did You Know! Your skin has its own unique microbiome—like a rainforest of bacteria. There are…

What’s The Average Lifespan Of A Red Blood Cell? 10 days 60 days 120 days 365 days Did You Know! Your brain starts slowing down before you’re 30—but compensates in…

What Color Is Your Stomach Lining Naturally? Yellow Pink White Grey Did You Know! The brain runs on just about 20 watts of power Despite being the command center of…