SciShow explains what really causes those popping sounds your joints make -- fluid dynamics, people! -- and what you should watch out for if you're a habitual knuckle-popper.
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Tagged under: knuckles,joints,pop,crack,sound,behavior,anatomy,biology,articular cartilage,synovial membrane,synovial fluid,science,quick questions,sci show,hank green,Michael Aranda (Person),Joint (Taxonomy Subject),Cracking Joints
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