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.
How White Matter Helps the Brain's Gray Matter Function
Bruce Willis Has Aphasia. What Is It and What Causes It?
Can Our Bodies 'Learn' to Withstand Frigid Temperatures?
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?
The World's Longest Poop Story Is a Crock of, Well ...
When You Have to Go But Don't Want People to Know
Farts Can Be Silent, But Can They Be Deadly, Too?
Does Oxytocin Make Us Fall in Love?
5 Ways Homeostasis Keeps Your Body Humming Along
Is It Possible to Get Taller as an Adult?
Why Do Babies' Eyes Change Color?
There Are 6 Different Eye Shapes. Which One Is Yours?
Self-navigating Cane Could Better Lives for Visually Impaired
What Do Your COVID-19 Vaccine Side Effects Tell You?
What You Should Know About Antibody Testing
Cytokine Storms: When Your Immune System Defends You to Death
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?
What Are Muscle 'Knots' and How Do You Get Rid of Them?
Take Care of Those Hammies
Children Can Regrow Their Fingertips. How Cool Is That?
The Science Behind Why We All Have Snot
The Flu Was Nonexistent During COVID. What Does That Mean?
Why Breathing Through Your Nose Is Best
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Believe it or snot, almost every living creature has some kind of mucus — because mucus does so many things. A study found mucus was so beneficial to mammals, it evolved independently in species.
Surely you've had a knot in your neck at some point. But your muscles really aren't tied in knots. Or are they?
Having kidney stones can feel like you've been stabbed in the back. But is it the stones causing the searing pain or is it something else?
By Dave Roos
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We've all heard of the brain's gray matter, but what about the white matter? What does it do?
The director of the Aphasia Research Laboratory at Boston University explains the condition forcing Bruce Willis to retire from acting, including what treatment options could be available.
By Swathi Kiran
Maybe you've seen those fantastical stories saying the world's longest piece of poop is 26 feet? Is that even possible? Where does crap like this come from?
By Alia Hoyt
Many things play a role in how our bodies acclimate to super-cold temperatures, including our own habits, genetics and even brown fat.
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Nearly all newborns have some shade of blue eyes at birth. But after a few months, they change. What's going on?
Knowing your eye shape can help with everything from selecting eyeglass frames to shaping the perfect brow.
The Fugates and the Combs families in rural Kentucky lost the genetic lottery, both sharing a rare recessive trait that made their skin look blue as they intermarried. What was the cause of this? And what happened to the families?
By Dave Roos
Stanford researchers have developed a new white cane, incorporating sensing and wayfinding approaches from robotics and self-driving vehicles. Could this new white cane reshape life for the visually impaired?
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Parosmia is a post-COVID-19 side effect that distorts your sense of taste and smell. But smell training (you read that right) can help most people get things back on track.
Technology for hearing aids has advanced drastically since our grandparents wore those big, bulky ones wrapped around their ears. Now they're Bluetooth-enabled and can even translate foreign languages on the fly.
Deaths from cases of the flu have dropped a staggering amount during the 2020-2021 flu season, even while cases of COVID-19 soared. What does that mean and what can we learn for the future?
Does feeling sick after you get the vaccine mean your immune system is responding? What if you don't feel sick? Does that mean it's not?
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Does using a bathroom other than your own freak you out? The Faux Fan drowns out the sounds your body makes when you have to, well, go, so you can poop without worrying people will hear.
By Meg Sparwath
Empty nose syndrome is a rare problem where patients have clear nasal passages but constant sensations of being unable to breathe. And worst of all, many doctors believe it's all in their heads.
Savant syndrome is a rare condition in which someone with significant mental disabilities demonstrates certain unexplained extraordinary abilities, such as playing music or remembering prodigious amounts of information.
We've probably all been breathing wrong our entire lives. Why is that? Experts suggest we should focus on breathing through our noses and most of us don't.
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There are eight major blood types and some are more common than others. But what's the rarest of them all?
Getting a bloody nose is nasty and can be also be pretty scary if you can't stop it. So what's the fastest — and safest — way to get your nose to stop bleeding?
Proprioception refers to our ability to perceive our body's position and how we move through space. It's often considered our sixth sense because we do it without thinking about it.
Blue light glasses are super popular these days. But do they work the way marketers promise?
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Although the inability to picture things in your head would seem to be a hinderance, some experts say it's definitely not a creativity killer and actually can have some advantages.
By Alia Hoyt
A low oxygen level in your blood is a good indicator of a COVID-19 infection, but what exactly does that mean and how do doctors test for it?