An MRI image of the same hand before knuckle cracking (left) and after (right), showing the void (dark spot) in the joint fluid that forms when the knuckles are cracked. An MRI image of the same hand ...

When someone stretches or bends their knuckle to crack it, they increase the space between the bones, which creates a drop in pressure in the joint. As a result of that pressure drop, the dissolved ...

Do you crack your knuckles? For decades, warnings about possible harm have caused concern about the habit — here is what the ...

Knuckle-cracking is both commonplace and cryptic: Why on earth do our knuckles make that annoying popping noise when we crack them? Scientists have speculated on the question for decades, but only now ...

There aren’t any awards to be won for solving science’s minor mysteries—why yawning is contagious, why puppies make us melt—but that doesn’t mean we don’t want the answers anyway. Add to those ...

Some people like the sound of knuckle-cracking and others loathe it, but for years there has been disagreement among scientists about what actually causes it. Researchers said on Wednesday they have ...

Fitness. Goodbye to pain, scientists discover a safe and non-addictive way to combat it Fitness. Is it possible to be 90 years old and in the best physical shape? The act of "cracking" or "popping" ...

Tales of terror about what happens when you crack your knuckles began, at least for me, with an annoyed third-grade teacher. Tired of the boys (it was always the boys ...

What do you get when you combine the "Wayne Gretzky of knuckle cracking" with a magnetic resonance imaging (MRI) machine? The answer to a very old question, it turns out. By using MRI to video-record ...

There aren’t any awards to be won for solving science’s minor mysteries—why yawning is contagious, why puppies make us melt—but that doesn’t mean we don’t want the answers anyway. Add to those ...