Scientists at agricultural institute Agroscope (in Switzerland, naturally) say they have an answer as to how Swiss cheese got its holes. Little particles of hay dust create gaps in the cheese as it matures. As more cheese makers eschew the old fashioned pump-n-pail for more advanced milking machines, a spokesperson …
https://www.inverse.com/article/3479-finally-a-solution-to-the-great-swiss-cheese-riddle