[tim-fan]

Relevant xkcd: https://m.xkcd.com/2682/

And from the alt-text:

"Friction-driven static electrification is familiar and fundamental in daily life, industry, and technology, but its basics have long been unknown and have continually perplexed scientists from ancient Greece to the high-tech era. [...] To date, no single theory can satisfactorily explain this mysterious but fundamental phenomenon." --Eui-Cheol Shin et. al. (2022)

[moffkalast]

Reminds me of this one https://xkcd.com/1489

"Of these four forces, there's one we don't really understand." "Is it the weak force or the strong--" "It's gravity."