Which Organ Contains The Most Water By Percentage? Skin Heart Kidneys Brain Did You Know! Your liver can grow back—like a lizard’s tail. The human liver is the only internal…

What Sleep Stage Is Most Important For Memory? Light sleep REM sleep Deep sleep Drowsy state Did You Know! You have more than one brain—sort of. The enteric nervous system…

What Part Of The Eye Can Change Color With Emotion? Retina Iris Cornea Lens Did You Know! Your bones are constantly swapping themselves out. Every 7–10 years, you essentially get…

What Can Shrink Up To 20% When Dehydrated? Skin Brain Lungs Liver Did You Know! Your Brain Registers Rejection Like Physical Pain Social rejection — like being excluded from a…

What Vitamin Do You Produce In Sunlight? Vitamin C Vitamin D Vitamin K Vitamin B12 Did You Know! Your Memory Rewrites Itself Each Time You Recall It Every time you…

What Naturally Causes Your Body To Wake Up In The Morning? Melatonin Sleep cycles Cortisol spike Caffeine Did You Know! Your Brain Can “Borrow” Emotions from Others Without Realizing It…

Which Sense Is Most Closely Tied To Memory? Sight Smell Touch Hearing Did You Know! Your Nose Can “Remember” Over 1 Trillion Smells While your eyes can distinguish about 10…

What Substance Do Your Tears Contain That Helps Kill Bacteria? Citric acid Lysozyme Collagen Histamine Did You Know! You Don’t Need All of Your Organs to Survive Believe it or…

What Is The Fastest Healing Part Of The Body? Heart Stomach lining Tongue Skin on hands Did You Know! Your Brain Can Store the Equivalent of 2.5 Million Gigabytes The…