[BITList] Cracked it! Scientists solve puzzle of why knuckles crack when pulled | Science | The Guardian

[Michael Feltham]

> http://www.theguardian.com/science/2015/apr/15/cracked-it-scientists-solve-puzzle-of-why-knuckles-crack-when-pulled <http://www.theguardian.com/science/2015/apr/15/cracked-it-scientists-solve-puzzle-of-why-knuckles-crack-when-pulled>
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> Cracked it! Scientists solve puzzle of why knuckles crack when pulled
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> For centuries, scientists have wrestled with the deepest mysteries of space, time and the nature of consciousness. But not all of them. Some turn their minds to what can fairly be described as lower-hanging fruit. Like why our knuckles crack when we pull them.
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