Read More:
What Makes Your Knuckles Pop?
http://science.howstuffworks.com/life/human-biology/question437.htm
"If you've ever laced your fingers together, turned your palms away from you and bent your fingers back, you know what knuckle popping sounds like."

Knuckle Cracking Q&A
http://www.hopkinsarthritis.org/arthritis-news/knuckle-cracking-q-a-from/
"Why do people crack knuckles? Cracked knuckles feel looser and enjoy more mobility for awhile after cracking."
Ask a Scientist: Does Cracking Your Knuckles Cause Arthritis?
http://www.huffingtonpost.com/2013/09/15/cracking-knuckles-bad-health_n_3907548.html
"There is no compelling scientific evidence that cracking your knuckles causes arthritis."

Ever Wondered if Cracking Your Knuckles is Bad for You?
http://www.washingtonpost.com/wp-dyn/content/article/2009/02/22/AR2009022201783.html
"If you're a kid, chances are you either crack your knuckles or know someone who cracks theirs."

Does Cracking Knuckles or Joints Cause Arthritis?
http://www.medicalnewstoday.com/articles/259603.php
"Cracking of joints, also referred to as 'popping', is a form of joint manipulation that produces a popping or cracking sound, as may occur during knuckle-cracking, a deliberate action."

What Makes the Sound When We Crack Our Knuckles?
http://www.scientificamerican.com/article.cfm?id=what-makes-the-sound-when
"To understand what happens when you 'crack' your knuckles, or any other joint, first you need a little background about the nature of the joints of the body."

How Arthritis Works
http://science.howstuffworks.com/life/human-biology/arthritis.htm
"Many of us think of arthritis as a condition that causes old people to rub their hands together and predict changes in the weather."

Knuckle Cracking and Hand Osteoarthritis
http://www.jabfm.org/content/24/2/169
"Previous studies have not shown a correlation between knuckle cracking (KC) and hand osteoarthritis (OA). However, one study showed an inverse correlation between KC and metacarpophalangeal joint OA."

Watch More:
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http://testtube.com/dnews/dnews-778-eye-floaters
TestTube Wild Card
http://testtube.com/dnews/dnews-467-tastedifferences?utm_source=YT&utm_medium=DNews&utm_campaign=DNWC
Why Are We Ticklish?
http://testtube.com/dnews/dnews-333-why-are-we-ticklish

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