60-Year Knuckle Experiment
7:07–7:33 · 26s
Josh recounts Dr. Donald Unger’s 60-year study in which he cracked only one hand’s knuckles to prove his mother wrong and found no arthritis difference.
7:07–7:33 · 26s
Josh recounts Dr. Donald Unger’s 60-year study in which he cracked only one hand’s knuckles to prove his mother wrong and found no arthritis difference.
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