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What makes your knuckles pop? by Brain Stuff | Mixes.VuiZ.Net
What makes your knuckles pop?
By
Brain Stuff
Tags:
#Howstuffworks
#How stuff works
#Marshall
#Knuckle popping
#Anatomy
What makes your knuckles pop?
Brain Stuff
0:00
0:00
Description
Learn more about the anatomy (and chemistry) behind that popping sound your knuckles make when you crack them in this episode of BrainStuff.
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