National Geographic | Mind, Body, Wonder

This week: An enticing new clue about long COVID; the four types of pneumonia; why dementia is so hard to diagnose; which leafy greens can make you sick; the link between your gums and arthritis; how red meat affects your health; what the Rorschach test says about you.

PHOTOGRAPH BY CAROLYN VAN HOUTEN, THE WASHINGTON POST/GETTY IMAGES

Has science solved the mystery of long COVID? A new clue could be the breakthrough we need.

Nearly 1 in 5 people who have had COVID-19 in the United States continue to suffer from symptoms of long COVID. But why some people recover completely while others remain sick has been a mystery. Now research has provided some enticing clues.

HOPE FOR TREATMENT?

PHOTOGRAPH BY MAGALI DRUSCOVICH, REUTERS/REDUX

What is POTS? This disorder has doubled since the pandemic

Millions of people now live with this debilitating disorder, which can be triggered by viral illnesses like COVID-19. Why has the recommended treatment backfired?

PHOTOGRAPH BY MASSIMO BREGA, SCIENCE PHOTO LIBRARY

What are the signs of dementia—and why is it so hard to diagnose?

There are many different types of dementia, and the way it manifests depends on which part of the brain is damaged. Here's what we do and don't know.

COMMON SYMPTOMS

PHOTOGRAPH BY LIVING ART ENTERPRISES, LLC/SCIENCE PHOTO LIBRARY

There are actually 4 types of pneumonia. These are the differences.

The world's leading cause of death for children under the age of 5 is also the leading cause of hospitalization for adults in the U.S. About 40,000 Americans die from the disease annually. We explain the different types of pneumonia, the risks of contracting each, and why it's so dangerous.

WHY IT'S SO DANGEROUS

PHOTOGRAPH BY COME SITTLER, REA/REDUX

Can you really trust triple-washed greens?

Leafy greens are the vegetables most likely to get you sick. If that makes you pause when you reach for your weekly bag of kale, you're not alone. Here's a look at which greens are healthiest, how to avoid getting sick, and whether you can really trust labels that say "pre-washed."

WHICH GREENS ARE HEALTHIEST?

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SEEDS: 7 seeds that are an amazing source of fiber, unsaturated fats, vitamins, and minerals

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PROTEIN: How much do you really need—and can you overdo it?

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VITAMIN D: You probably aren't getting enough. Here's what the experts say

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VITAMIN C: Is one of the most popular supplements overrated? Here's what it can and can’t do.

HOW RED MEAT AND DIABETES ARE LINKED

PHOTOGRAPH BY BRIAN FINKE C/O EVERYBODY SOMEBODY INC, NAT GEO IMAGE COLLECTION

It's long been known that consuming lots of red meat is harmful. But new research shows what even a modest amount can do to your body—including raising your risk of type 2 diabetes. Here's a look at the diseases associated with eating red meat—and how to moderate your consumption.

HOW RED MEAT AFFECTS YOUR HEALTH

WANT TO EAT MORE VEGGIES? Here's how to incorporate plant-based foods into your diet +

GUM DISEASE AND INFLAMMATION

PHOTOGRAPH BY REBECCA HALE, NATIONAL GEOGRAPHIC

More than 2,000 years ago, Hippocrates suggested pulling teeth could cure arthritis. He was on the right track, sort of. A growing body of research is showing links between gum infections and arthritis. Here's what we know.

YOUR MOUTH AND YOUR JOINTS

THE END OF INFLAMMATION? This new approach could treat dozens of diseases. +

THE PESTS THAT CAN REALLY HURT YOU

PHOTOGRAPH BY ALLEN BRISSON-SMITH/THE NEW YORK TIMES/REDUX

While bedbugs have grabbed headlines lately, the tiny bloodsuckers are more icky than dangerous. There are, however, a host of dangerous creepy-crawlies you can encounter, especially if you travel. Here are the pests that can cause you lasting harm, from ticks to worms, and what to do if you encounter one.

A GUIDE TO PESTS

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You really are a mosquito magnet. Here's what you can do about it.

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How to keep ticks away, what to do if you find one on you, and how to identify a bite

READ MORE TOP STORIES FROM NAT GEO

PHOTOGRAPH BY MARK THIESSEN, NGM STAFF. RORSCHACH TEST CARD COURTESY MERIT, L.A.

Created more than 100 years ago, the Rorschach Test and its infamous inkblots once fell out of favor and were dismissed as pseudoscience. But modern psychologists say they're more effective than previously believed.

WHAT INKBLOTS CAN SAY ABOUT YOU

Has science solved one of history’s greatest adventure mysteries?

How sugar and fat affect your brain

Wreck of fabled WWI German U-boat found off Virginia

This American diet could add 10 years to your life

Why curly hair was an evolutionary advantage

Humans are not prepared for a pandemic caused by fungal infections

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