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The Popping Sound Cracking Knuckles Make Continues To Intrigue
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A graduate student in France is the latest to investigate why cracking knuckles make that noise. His answer involved a series of math equations.
NOEL KING, HOST:
Good morning. I'm Noel King with the answer to a mystery that has puzzled scientists and kids for years. When we crack our knuckles, why do they make that popping sound? A grad student in France, Vineeth Suja, was cracking his knuckles in class and thought he could figure it out. He worked up a series of math equations, and, well, it's complicated, but there are little bubbles in your joint fluid. And when you crack your knuckles, the sound you hear is the bubbles popping. It's MORNING EDITION. Transcript provided by NPR, Copyright NPR.
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But the game has changed: Congress voted to eliminate funding for public media across the country. Here at LAist that means a loss of $1.7 million in our budget every year. We want to assure you that despite growing threats to free press and free speech, LAist will remain a voice you know and trust. Speaking frankly, the amount of reader support we receive will help determine how strong of a newsroom we are going forward to cover the important news in our community.
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