A Doctor Cracked His Own Knuckles for 60 Years to Prove It Doesn’t Cause Arthritis

In a one-person experiment that may bring a chuckle to some, a California doctor spent 60 years cracking his knuckles to see if knuckle cracking causes arthritis. To have a proper comparison, the doctor cracked only the knuckles on his left hand — and concluded after six decades that both hands had acquired arthritis at equal levels. His “study,” which basically turned an old wives’ tale on its head, earned him the Ig Nobel Prize for Medicine, an award that parodies the...

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