Is it really safe to crack your knuckles?

If you've been told by a loved one that cracking your knuckles will give you arthritis, it's time to feel vindicated.

While scientists used to think that cracking sound was created by bubbles popping in your synovial fluid (the substance that acts as a lubricant for your joints) but doctors this year discovered that the sound is actually created by a cavity forming. And nothing is being broken or damaged while you crack.

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So that's one bad habit you can continue.

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