What Body Fluid Can Naturally Kill Bacteria? Tears Sweat Blood Saliva Did You Know! Bones are stronger than concrete — by weightOunce for ounce, human bone is stronger than steel…

What Human Organ Has No Pain Receptors? Lungs Brain Liver Heart Did You Know! The smallest bone in your body is smaller than a grain of riceThe stapes bone in…

Which Animal’s Milk Is Closest To Human Milk? Cow Goat Sheep Donkey Did You Know! Your bones are constantly “eating themselves” and rebuildingBones are not static — they undergo continuous…

What Bodily Function Can Stop Your Heart Momentarily? Blinking Burping Sneezing Coughing Did You Know! You have a second “brain” in your gut. The enteric nervous system—often called the “second…

Which Vegetable Can Temporarily Turn Skin Orange If Eaten In Excess? Carrots Beets Spinach Tomatoes Did You Know! The brain can generate electricity strong enough to power a light bulb….

How Many Muscles Does It Take To Frown? 12 43 8 26 Did You Know! You Have “Jumping Genes” Almost half of your DNA is made of transposable elements, or…

What Color Were Hospital Walls Originally Painted To Calm Patients? Green Blue Beige White Did You Know! About 8% of your DNA comes from ancient viruses that infected our ancestors…

Which Of These Animals Can Delay Aging and Regenerate? Octopus Jellyfish Seahorse Starfish Did You Know! Rabies Has a 100% Fatality Rate—Unless Treated Before Symptoms Appear Fact: Once rabies symptoms…

What Food Is Most Likely To Cause Choking Deaths? Popcorn Hot dogs Grapes Candy Did You Know! You Can Be Allergic to Cold Temperatures Fact: “Cold Urticaria” is a rare…