Human Body

The eye twitching that's driving you crazy - it's likely caused by nothing more than stress or fatigue. But you may need to see a doctor if you have other symptoms, too.

By Michelle Konstantinovsky

Listed as an organ donor on your driver's license? That designation does not include your brain.

By Chris Opfer

HowStuffWorks interviews Dr. Mathew Pombo a Orthopedic Sports Medicine Surgeon at Emory about how 3d printing is used to help people walk

You'll probably be OK if your tongue turns black and hairy, but you should definitely see a medical professional.

By Jesslyn Shields

Sudden savant syndrome can make you a math whiz or musical prodigy instantaneously. But how?

By Jesslyn Shields

Eyebrow trends over the last 100 years

It happens to almost everyone and there are lots of possible explanations.

By Michelle Konstantinovsky

James Harrison's blood contains a rare and powerful antibody that's saved millions of Australian babies. Now, at age 81, after donating 1,173 times, he's hoping someone else will pick up where he left off.

By Christopher Hassiotis

Whether you have an innie, an outie, or none at all (you'll have to read the article to find out how that's possible), we've got you covered.

By Dave Roos

The discovery of a new interstitial "organ" may explain how cancers metastasize, how acupuncture works.

By Stell Simonton

You had LASIK surgery a few years ago, and your vision has started to blur again. Is this normal?

By Nathan Chandler

Diplomatic staffers in Havana, Cuba, recently began to suffer from a series of health problems. Were they sound-related?

By Patrick J. Kiger

What would happen if you didn't (or couldn't) move your bowels for several weeks? Let's just say you'd be in a crappy situation.

By Alia Hoyt

The human system for excretion is actually pretty great, especially when you start looking at what other animals have.

By Robert Lamb

In case you needed one.

By Robert Lamb

Does it just taste bad or are there other reasons?

By John Perritano

Although women often think men exaggerate their symptoms when they have a cold or flu, a Canadian scientist has found that men are more susceptible to respiratory complications than women.

By Alia Hoyt

A study asked participants to determine where a number of body parts such as the spleen, liver and thyroid were located in the human body. The only part everyone got correctly was the brain. Think you can do better? Take this quiz and find out!

By Alia Hoyt

When we've really got to urinate, kids and adults alike do the pee-pee dance. What are the theories behind the fidgeting?

By Jesslyn Shields

No. 5 may seem like it's just hanging out there, but if you've ever injured it, you may have discovered how important it is for walking.

By Alia Hoyt

New research finds that nontoxic, antibacterial sugars found in human breast milk might be key to the next generation of antimicrobial drugs.

By Jesslyn Shields

The Jamaican sprinter has a uniquely uneven gait. Is he the fastest man alive because of, or despite, this asymmetry?

By Patrick J. Kiger

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?

By Melanie Radzicki McManus

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