Body Systems
Your body is pretty amazing. At any given point you have many biological processes going on -- circulatory, digestive, brain & central nervous systems and more. Learn about these body systems as well as the eye, ears, nose and throat.
Ever Stand Up and Get Dizzy?
How White Matter Helps the Brain's Gray Matter Function
Bruce Willis Has Aphasia. What Is It and What Causes It?
The True Story of the Blue People of Kentucky
What Is the Rarest Blood Type in the World?
What Does It Mean If Your Blood Oxygen Level Is Low?
What Is Saliva and How Does It Change the Taste of Food?
The World's Longest Poop Story Is a Crock of, Well ...
When You Have to Go But Don't Want People to Know
Does Oxytocin Make Us Fall in Love?
5 Ways Homeostasis Keeps Your Body Humming Along
Is It Possible to Get Taller as an Adult?
Do You Have One of the 6 Rarest Eye Colors in the World?
Why Do Babies' Eyes Change Color?
There Are 6 Different Eye Shapes. Which One Is Yours?
'Man Flu' Could Be a Real Thing
Sugars in Human Breast Milk Act as Antibacterial Agents
Does mouthwash affect your immune system?
Kidney Stones Are Excruciating, But the Source of Pain Is Surprising
Why Do We Do a Little Dance When We Have to Pee?
Do You Turn the Door Key and Have to Pee? It May Be All in Your Brain
The Lymph System
What is lymph?
How One Key Protein May Help Tendons Enhance Athletic Performance
What Are Muscle 'Knots' and How Do You Get Rid of Them?
Children Can Regrow Their Fingertips. How Cool Is That?
What Happens When the Wind Is Knocked Out of You?
The Science Behind Why We All Have Snot
Why Breathing Through Your Nose Is Best
Learn More / Page 3
New research finds that nontoxic, antibacterial sugars found in human breast milk might be key to the next generation of antimicrobial drugs.
If you find yourself running to the bathroom the minute you get home, experts posit this is a case of mind over bladder.
By Alia Hoyt
Colorblindness affects around 300 million people worldwide. What is it and how can glasses help?
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Although we've often been told that dogs have a superior sense of smell to people, a new report says there's little difference.
By Alia Hoyt
Plenty of theories exist for why drinking an entire gallon of milk in one sitting is a challenge often undertaken, infrequently accomplished. Who's right?
From killer sausages to canceling crows' feet, botulinum toxin has come a long way. Botoxwurst, anyone?
Careful with that chopping knife! If you lose a fingertip, it's probably gone forever. With kids, however, that's not always the case. Why is that?
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Maybe if you look at it with only one eye -- in the dark.
And it's not because of all that screen time.
Scientists discover that using a feed additive can decrease cow burps by 30 percent, vastly reducing greenhouse gas.
By Dave Roos
Does vocal fry signal the most annoying end of times? Or is it just part of a natural language progression?
By Oisin Curran
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Think your peepers are passé? Some cutting-edge cosmetic procedures can take your brown eyes to bright blue - with a few inherent risks.
Poetry is full of references to salty and bitter tears, but there's not much about bloody tears. Besides movie villains who weep blood, is this phenomenon real?
Tired of standing on tiptoes when you pose for a photo with friends? If you're an adult looking to add a few inches to your frame, you might be out of luck.
In some settings, you just can't heave a giant sneeze. If you hold back during a meeting or date, you're exhibiting decorum. Could you also be making a death wish?
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It's hard to imagine being thankful for mucus when you've got a nose full of it, but if it all went away you'd really be in trouble.
Smelling fecal matter is gross enough, so the possibility that tiny bits of poop are actually getting into your nose is outright disgusting. But should you be worried?
Earwax might seem like just another gross bodily substance, but it serves a very important function in the health of your ear canal.
Tiny little babies are so sweet and cuddly. That is until you have to change their poopy diaper. What in the world is it that makes their poop so foul?
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Boogers are more than an annoyance. Your body makes them for a very specific purpose - and it's not to gross out other people.
We all pass gas, but not all of us like to talk about it - or study it to figure out how quickly it travels out of the body.
As you're wiping away the crust from your eyes in the morning, do you ever ponder why it forms in the first place?
Any doctor will tell you not to stick a cotton swab in your ear, although most of us disregard the warning. Luckily, there are safer ways to remove earwax.
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We're taught that it's impolite to pass gas in front of others, but could holding it in cause you health problems?
They say there are two types of people who pick their nose - those who do and those who lie about doing it. Would you be more prone to admit it if you found out it might be good for you? Let's see if it is.