What REALLY Happens When You Crack Your Knuckles?

Most people think cracking your knuckles is your bones grinding—but the truth is way more fascinating.
Inside your joints, nitrogen gas bubbles collapse in a tiny implosion, creating that sharp popping sound. This video breaks down the science behind knuckle cracking using visuals and simple explanations.

Is it safe? Why does it happen? And is it really an explosion inside your body? Find out in this video.
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