xkcd #3115: Unsolved Physics Problems
Title text:
‘Tin pest’ makes more sense to me. Tin just doesn’t want to be locked down in a shape like that. I get it. But why would any metal want to grow hair??
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3115/
Oh, but of course! The deviatoric strain, yes.