Eleanor Nelsen: Why do your knuckles pop? (2015x52)
Yayınlanma tarihi: May 05, 2015
Some people love the feeling of cracking their knuckles, while others cringe at the sound. But what causes that trademark pop? And is it dangerous? Eleanor Nelsen gives the facts behind joint popping. [Directed by Steve Belfer Creative, narrated by Addison Anderson].
