[matthewrhoden1]

I know there isn't anything to worry about, thanks to that one guy popping his knuckles in one hand for 60 years (quick google: http://geekologie.com/2015/03/taking-one-for-the-team-man-cr...) but the description in this article made me not want to pop mine anymore. :(

[lgas]

There's only nothing to worry about if you don't mind reduced grip strength:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1004074/pdf/annr...

[vanderZwan]

Err... that doesn't look like a proven causal relation to me?

[dTal]

That man is a true scientist.