What Strange Thing Happens To Astronauts' Taste Buds In Space? They shut down completely They become less sensitive They crave sour foods They misfire randomly Did You Know! Your Brain…

Which Ancient Civilization Performed The Earliest Known Brain Surgery? Romans Greeks Incas Egyptians Did You Know! Your Heart Has Its Own “Brain” The human heart contains about 40,000 specialized neurons,…

What’s Unique About The Heart’s Electrical System? It stops when you sleep It uses stored static electricity It beats faster if you whistle It can beat outside the body Did…

What Rare Disorder Makes People Unable To Feel Physical Pain? Narcolepsy Congenital Insensitivity to Pain Hemophilia Hyperalgesia Did You Know! Your Stomach Can Grow New Layers Every Few Days The…

Which Unusual Condition Causes People To Shed Tears Of Blood? Epistaxis Haemolacria Hemophilia Lacrimal rupture Did You Know! Your Lungs Are the Only Organs That Can Float and “Regrow” Tissue…

Which Human Organ Was Once Thought To Be Completely Useless? Tonsils Spleen Appendix Gallbladder Did You Know! Your Left Lung Has a “Notch” to Make Room for Your Heart The…

What Unusual Thing Did Doctors Use To Test For Pregnancy Before Modern Tests? Cat fur reaction Frogs Color-changing rocks Garlic breath test Did You Know! Your Lungs Can Float on…

What Rare Condition Causes People To See Sound Or Taste Colors? Prosopagnosia Synesthesia Aphasia Vertigo Did You Know! Your Digestive System Works Even When You’re Standing on Your Head Gravity…

How Long Can A Red Blood Cell Survive Before Being Replaced? 20 days 45 days 120 days 365 days Did You Know! Your Gut Produces More Neurotransmitters Than Your Brain…