Swiss cheese is made by heating cow's milk at high temperatures and then lifting the curd from the whey in one mass in a fine-mesh net. This mass is then shaped into blocks, salted with strong brine, wrapped to prevent drying, and stored for six to eight weeks to ferment at 80º Fahrenheit. During the weeks of curing, the cultures begin to grow causing the body of the cheese to break down, the holes to form and that great Swiss cheese flavor to develop. The famous "holes" in Swiss cheese develop because of the gas that occurs naturally from the breakdown of milk sugar in the cheese. The cheese maker takes periodic samples to determine that the holes of the cheese are properly developed.

A search on "swiss cheese holes" revealed that gassy bacteria are behind all that holey cheese. In order to make cheese, you need the help of bacteria. Starter cultures containing bacteria are added to milk, where they create lactic acid, essential for producing cheese. Various types of bacteria can be used to make cheese, and some cheeses require several different bacteria to give them a particular flavor.

Propionibacter shermani is one of the three types of bacteria used to make Swiss cheese, and it's responsible for the cheese's distinctive holes. Once P. shermani is added to the cheese mixture and warmed, bubbles of carbon dioxide form. These bubbles become holes in the final product. Cheesemakers can control the size of the holes by changing the acidity, temperature, and curing time of the mixture. Incidentally, those holes are technically called "eyes".

A number of cheeses are marketed under the name of Swiss cheese. The true Swiss cheese is Swiss Emmental or Emmentaler, produced in a particular part of Switzerland. Emmental has a protected origin designation, which means that only cheese prepared in that area of Switzerland, and in a certain way, can be labeled Emmental. Swiss Emmental has the creamy texture and large holes most consumers associate with “Swiss cheese.”
https://www.inspirationline.com/Brainteaser/cheese.htm
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More trivia:
1. From a place in this country, you can spot both the Atlantic and Pacific Oceans:
Costa Rica; Alaska; Brazil; Cuba2. Where is the volcanic Mount Etna located?
Cyprus; Greece; Sardinia; Sicily
3. What state is known as the Tar Heel State?
Alabama; South Carolina; Tennessee ;North Carolina
4. Which country does not border the Eastern European Republic of Georgia?
Russia; Turkey; Armenia; Belarus
5. Which is not a desert found in Africa?
Sahara; Kalahari; Atacama; Somali
6. The Hoover Dam touches two states. One is Nevada, what is the other?
Texas; California; Colorado; Arizona
7. What is the longest river in Italy?
Po; Tiber; Florence; Sardinia
8. Where is the port of Durban located?
Scotland; Greece; India; South Africa
9. Which mountain peak is not in the Cascades?
Mt. Egmont; Mt. St. Helens; Mt. Shasta; Lassen Peak
10. Other than Toronto and Montreal, which other Canadian city has over one million people?
Vancouver; Quebec; Calgary; Edmonton
11. What range was named after Hercules' love who was killed by wild beasts in these mountains?
Carpathians; Jura Mountains; Atlas Mountains; Pyrenees
12. Which state is Mount Whitney located in?
Nevada; California; Wyoming; Oregon
13. Andorra, Liechtenstein and Monaco are all considered:
Commonwealths; Principalities; Confederations; Republics
14. In what country would you find the 4,700 square-mile Negev Desert?
Sri Lanka; Panama; Israel; Nigeria
15. Petroglyph, Bandelier and El Morro are National Monuments found in what US state?
Oregon; North Dakota; New Mexico; Georgia
16. What country was once known as New Holland?
Zambia; Canada; Australia; Nigeria
17. In legend, Lady Godiva rode naked through this English town:
Plymouth; Leeds; Birmingham; Coventry
18. Mount Kilauea in Hawaii Volcanoes National Park is located on which of the Hawaiian Islands?
Hawaii; Molokai; Oahu; Lanai
19. Maromokotro Peak and Tsaratanana Massif are 9,000-foot-plus peaks located on what large island?
Madagascar; Greenland; Baffin Island; Java
20. What is the capital city of Norway?
Bodo; Trondhelm; Alesund; Oslo
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ANSWERS: Access each link below for lots of interesting details...
1..... Costa Rica
2..... Sicily
3..... North Carolina
4..... Belarus
5..... Atacama
6..... Arizona
7..... Po
8..... South Africa
9..... Mt. Egmont
10... Vancouver
11... Pyrenees
12... California
13... Principalities
14... Israel
15... New Mexico
16... Australia
17... Coventry
18... Hawaii
19... Madagascar
20... Oslo
From www.CoolQuiz.com