Researchers finally cracked the mystery of the 'cracking' knuckles. A gas bubble between the bones of the pulled joints creates the familiar, satisfying sound and a flash of bright light as seen via ultrasound imaging.
Researchers finally cracked the mystery of the 'cracking' knuckles. A gas bubble between the bones of the pulled joints creates the familiar, satisfying sound and a flash of bright light as seen via ultrasound imaging.
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