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Cracked it! Experts find answer to the knuckle-popping puzzle

/ 05:45 PM March 30, 2018

What exactly is it that causes that wince-inducing sound when you pop your knuckles? © Staras / IStock.com via AFP

It has puzzled scientists for over 100 years but now they appear to have cracked it: what, exactly, is it that causes that wince-inducing sound when you pop your knuckles?

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