Scientists discover the real reason Swiss cheese has holes


A team of Swiss scientists has finally discovered the answer to a mystery close to their hearts: the reason Swiss cheese has holes.
The scientists at Agroscope, an agricultural research center, found that the holes are the result of hay inside the milk used to make the cheese, rather than from bacteria, as scientists previously believed.
The researchers explained to The Guardian that small bits of hay can fall into traditional milk buckets, which can cause holes in the cheese. Most modern cheesemaking techniques don't use traditional buckets, which eliminates the hay bits.
Subscribe to The Week
Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.

Sign up for The Week's Free Newsletters
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
Before the new study, most scientists believed a 1917 study arguing that the holes were caused by milk bacteria releasing carbon dioxide during Swiss cheese production. But recent developments also side with the Agroscope team's findings — in the last 10 to 15 years, Swiss cheese has had fewer holes, as traditional milk buckets have been replaced by sealed milking machines.
Sign up for Today's Best Articles in your inbox
A free daily email with the biggest news stories of the day – and the best features from TheWeek.com
Meghan DeMaria is a staff writer at TheWeek.com. She has previously worked for USA Today and Marie Claire.
-
Critics' choice: Three takes on tavern dining
Feature A second Minetta Tavern, A 1946 dining experience, and a menu with a mission
By The Week US
-
Film reviews: Warfare and A Minecraft Movie
Feature A combat film that puts us in the thick of it and five misfits fall into a cubic-world adventure
By The Week US
-
What to know before lending money to family or friends
the explainer Ensure both your relationship and your finances remain intact
By Becca Stanek, The Week US
-
Katy Perry, Gayle King visit space on Bezos rocket
Speed Read Six well-known women went into lower orbit for 11 minutes
By Peter Weber, The Week US
-
Scientists map miles of wiring in mouse brain
Speed Read Researchers have created the 'largest and most detailed wiring diagram of a mammalian brain to date,' said Nature
By Peter Weber, The Week US
-
Scientists genetically revive extinct 'dire wolves'
Speed Read A 'de-extinction' company has revived the species made popular by HBO's 'Game of Thrones'
By Peter Weber, The Week US
-
Dark energy may not doom the universe, data suggests
Speed Read The dark energy pushing the universe apart appears to be weakening
By Peter Weber, The Week US
-
Pharaoh's tomb discovered for first time in 100 years
Speed Read This is the first burial chamber of a pharaoh unearthed since Tutankhamun in 1922
By Peter Weber, The Week US
-
Scientists report optimal method to boil an egg
Speed Read It takes two temperatures of water to achieve and no fancy gadgets
By Peter Weber, The Week US
-
Europe records big leap in renewable energy
Speed Read Solar power overtook coal for the first time
By Peter Weber, The Week US
-
Blue Origin conducts 1st test flight of massive rocket
Speed Read The Jeff Bezos-founded space company conducted a mostly successful test flight of its 320-foot-tall New Glenn rocket
By Peter Weber, The Week US