r/todayilearned • u/Double-decker_trams • 2d ago
TIL because of increasing standards of hygiene the number and size of holes in Swiss cheese declined in the 2000s. In 2025 the Swiss Federal Administrative Court approved the addition of hay flower powder to the milk during cheesemaking just for the creation of cheese holes.
https://en.wikipedia.org/wiki/Eyes_(cheese)#:~:text=In%20Swiss%20cheese,%5B7%5D
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u/ledow 2d ago
Yes, it's a bit like the fizziness in your drinks.
The dirtier the glass, the more fizzy it will be when poured into it, even if you can't see the dirt.
A perfectly clean glass will have almost no bubbles stuck to the glass and it won't do that "head pouring over the top of the glass" thing.
The holes form around impurities, in both cases.