46 Mouthwatering Facts About Pizza


If you live in the United States, it’s statistically likely you’ll eat around 6000 slices of pizza over the course of your life. But how much do you actually know about that delicious combo of dough, cheese, and sauce? Where did pizza come from? What makes a great slice?

Whether you’re a fan of thin crust, deep dish, or the New York slice, here are 46 facts that’ll tell you everything you need to know about pizza:

1. The word “pizza” dates back over a thousand years—it was first mentioned in a Latin text written in southern Italy in 997 CE.

2. In 1835, Alexandre Dumas, author of The Three Musketeers, traveled to Naples, where he observed that the Neapolitan poor ate nothing but watermelon during the summer and pizza during the winter.

3. The first pizza place in America was Lombardi’s in New York City—originally a grocery store, Lombardi’s started selling pizza in 1905.

4. During the first few decades of the 20th century, pizza was predominantly eaten and sold by working class Italian immigrants...

5. … But after World War II, American GIs came home from Italy with a craving for pizza, bringing the food to a broader consumer base for the first time.

6. The first American cities to start selling pizza were New York, Boston, New Haven, Conn., and Trenton, N.J. All four of these cities had an influx of Southern Italian immigrants around the turn of the century.

7. At first, pizzas were sold exclusively by the pie. But in 1933, Patsy Lancieri (of Patsy's Pizzeria in New York City) started selling pizza by the slice—a trend that was quickly picked up by other pizzerias.

8. Humans aren’t the only ones who love the taste of pizza: There’s even a mini pizza for dogs called the “Heaven Scent Pizza” made of flour, carrots, celery, and parmesan cheese.

9. The first-known Chicago deep dish pizzas were created in 1943 by the restaurant that later became the Pizzeria Uno chain.

10. Domino’s was founded in 1960. The restaurant chain’s founder, Tom Monaghan, is one of three people in the world who hold an advanced degree in "Pizza-ology” from the “Domino’s College of Pizza-ology”—a business management program he founded in the ‘80s.

11. Domino’s dropped its “30 minutes or less” guarantee in 1993 after a series of lawsuits accused the company of promoting unsafe driving.

12. The Domino's delivery offer is still good in some places around the world. The guarantee has been great for business in Turkey, for instance. 

13. The first frozen pizza hit the market in 1962. It mostly tasted like cardboard until the genius food inventor Rose Totino got her hands on it. 

14. The Hawaiian pizza was invented in 1962 by Sam Panopoulos, a native of Greece who ran a pizza place in Canada. 

15. In the late ‘60s, the U.S. Army’s 113th Military Intelligence Unit spied on reporters and politicians using fake pizza deliveries.

16. Pizza may have originated in Italy, but countries around the world have developed their own regional spins on the classic food. In Brazil chefs top their pizzas with green peas, the French love fried eggs on their slices, and in China a crust made of mini-hot dogs is surprisingly popular.

17. The first pizza ordered by computer happened in 1974: The Artificial Language Laboratory at Michigan State needed to test out its new “speaking computer,” so they used it to order a pepperoni, mushroom, ham, and sausage pizza from a local pizza joint. 

18. In the 1980s, the Pizza Connection trial became the longest running criminal jury trial in American history, running from 1985 to 1987. It prosecuted a group of mafia members who were using pizza restaurants as a front for drug trafficking.

19. Chuck E. Cheese's was founded by Nolan Bushnell, the co-founder of Atari, as a way to make more money off of the game consoles.

20. Chuck E. Cheese may be the most famous animatronic pizza-selling animal in the world, but in the '80s, ShowBiz Pizza Place’s “Rock-A-Fire Explosion” gave the rat a run for his money. ShowBiz's animatronic band played hit pop songs and original tunes at locations across America, and were the creation of Aaron Fechter (who also invented Whac-a-Mole).

21. When pizza chefs around the world need help with their recipes, they turn to “Dough Doctor” Tom Lehmann. Lehmann, who lives in Manhattan, Kansas, is a pizza expert who’s been working with the American Institute of Baking since 1967. One of the biggest challenges he's faced? Low-carb dough requests during the height of the Atkins diet craze.

22. Plenty of famous people got their start making and delivering pizzas. Stephen Baldwin and Bill Murray both worked at pizza restaurants, and Jean Claude Van Damme used to deliver pizzas. 

23. The only pizza-themed superhero movie made to date is called Pizza Man—released in 2011, the film stars Frankie Muniz as a pizza delivery guy who acquires super powers from eating a genetically modified tomato.

24. In 2013, former child star Macaulay Culkin formed a pizza-themed Velvet Underground cover band called Pizza Underground. The band performs hits like “I’m Waiting for the Delivery Man” and “All the Pizza Parties.”

25. Pizza played a role in helping police catch an alleged serial killer known as the “Grim Sleeper” in 2010 when an undercover officer took a DNA sample from a slice of pizza the killer had been snacking on at a family birthday party. 

26. Pizza has also helped prevent several crimes: In 2008 when a pizza delivery man in Florida was confronted by robbers, he threw the hot pizza he was delivering at them and escaped harm.

27. In 2014, a woman called 911 to report a burglary and sexual assault, but because the burglar was still in her home, she came up with a novel way to get the attention of police: she pretended to order a pizza. Fortunately, the police figured out that something was not quite right with the pizza order, and instantly responded to the call.

28. In 2001, Pizza Hut delivered a six-inch salami pizza to the International Space Station—the first pizza delivered to outer space

29. A little over a decade later, in 2013, a group of NASA-funded scientists invented a 3D printer that could cook pizza in just 70 seconds, literally spraying on flavor, smell, and micronutrients.

30. The U.S. Military Lab recently invented a ready-to-eat pizza that can last for up to three years. The pizza is intended for soldiers abroad who are craving a slice… and also presumably for anyone preparing for a zombie apocalypse.

31. Pizza is such an iconic food, it even inspired an art show. In 2013, the Marlborough Broome Street Gallery in New York curated a show called “Pizza Time!” featuring more than 25 pizza-inspired works of art. The works ranged from paintings like “Caveman on Pizza,” which featured a sunglasses-wearing caveman surfing a giant slice of pizza, to works of art made of actual pizza, like John Riepenhoff’s “Physical Pizza Networking Theory.”

32. Pizza chefs use a wide variety of pizza lingo to show they’re in the know. For example, a ball of dough that’s been stretched and is ready for toppings is called a “skin,” mushrooms are often referred to as “screamers,” and slices of pepperoni are called “flyers,” for the way they’re thrown around the pizza kitchen like Frisbees.

33. Pizza chefs call the internal cell structure of pizza dough “the crumb”—most pizza makers try to achieve a crumb that’s airy with large holes.

34. The four primary kinds of mozzarella used to make pizza are mozzarella di bufala (made from the milk of water buffalo in Italy, and used on Neapolitan-style pizzas), fior di latte (similar to mozzarella di bufala, but made from cow’s milk), burrata (a fresh Italian cheese known for its creamy filling), and “pizza cheese" (the less perishable whole-milk or part-skim mozzarella used by the majority of American pizzerias).

35. In 2014, food scientists studied the baking properties of different cheeses, and found scientific evidence for a commonly known fact—mozzarella makes the best pizza cheese.

36. Ever eat a soggy slice of pizza that seemed to have a gross gooey layer between the base and the toppings? There’s a term for that. It’s called the “Gum Line,” and it's dreaded by pizza chefs. It’s caused when dough is undercooked, has too little yeast, or is topped with sauce or cheese that’s recently been pulled from the refrigerator and hasn’t had a chance to reach room temperature.

37. Think spinning pizza dough sounds simple? Think again. Dough-spinning has its own professional-level sporting event where pizza teams compete in acrobatic dough-spinning competitions at the World Pizza Championships.

38. But spinning pizza dough isn’t just for show: It’s the best way to evenly spread dough, create a uniform crust, and even helps the dough retain moisture.

39. There’s an association called the Associazione Verace Pizza Nepoletana (“True Neapolitan Pizza Association”) that sets specific rules about what qualifies as a true Neapolitan pizza and certifies pizza restaurants accordingly.

40. According to legend, the “Pizza Margherita” takes its name from Queen Margherita of Savoy who, in 1889, sampled three pizza flavors made by master pizza chef Raffaele Esposito and expressed a preference for the version topped with tomatoes, mozzarella, and basil, and designed to resemble the Italian flag. Nice story—and while the Queen did eat Esposito's pizza, there's no evidence of what was on the menu, and a lot of skepticism that this was mostly a marketing scheme concocted (complete with forged historical documents!) to boost business. 

41. Over the years a number of strange pizza-flavored products have been released, including potato chips, condoms, ice cream, beer, and e-cigarettes.

42. There’s a pizza museum in Philadelphia called Pizza Brain that is home to the world’s largest collection of pizza memorabilia.

43. Pizzerias sell the most pizzas on Halloween, the night before Thanksgiving, New Year’s Eve, New Year’s Day, and Super Bowl Sunday.

44. The largest pizza in the world was 131 feet in diameter, and weighed 51,257 pounds.

45. The inventors of Bagel Bites got the inspiration for their first recipe off the back of a Lender's Bagel bag.

46. Research firm Technomic estimated in 2013 that Americans eat 350 slices of pizza each second, and that 40 percent of us eat pizza at least once a week.

5 Ways to Define a Sandwich, According to the Law

It’s easy to say what a sandwich is. Grilled cheese? Definitely a sandwich. Bacon, lettuce, and tomato? There’s no question. Things start to get messy when you specify what a sandwich isn’t. Is a hot dog a sandwich? What about a burrito, or an open-faced turkey melt?

The question of sandwich-hood sounds like something a monk might ponder on a mountaintop. But the answer has real-world implications. On several occasions, governments have ruled on the food industry’s right to use the delectable label. Now, Ruth Bader Ginsburg—pop culture icon, scrunchie connoisseur, and Supreme Court Justice—has weighed in on the matter.

When pressed on the hot-button issue as to whether a hot dog is a sandwich while appearing on The Late Show with Stephen Colbert, Ginsburg proved her extreme judiciousness by throwing the question back at Colbert and asking for his definition of sandwich before making a ruling. Her summation? A hot dog fits Colbert's definition of a sandwich, and therefore can be considered one.

While RBG's ruling may not be an official one, it matches Merriam-Webster's bold declaration that a hot dog is a sandwich (even if the Hot Dog Council disagrees). Officially, here’s where the law stands on the great sandwich debate.


Hot dogs are often snagged in the center of the sandwich semantics drama. Despite fitting the description of a food product served on a bread-like product, many sandwich purists insist that hot dogs deserve their own category. California joins Merriam-Webster in declaring that a hot dog is a sandwich nonetheless. The bold word choice appears in the state’s tax law, which mentions “hot dog and hamburger sandwiches” served from “sandwich stands or booths.” Applying the sandwich label to burgers is less controversial, but it’s still worth debating.


When Qdoba threatened to encroach on the territory of a Panera Bread in Shrewsbury, Massachusetts, the owners of the bakery franchise fought back. They claimed the Mexican chain’s arrival would violate their lease agreement with the White City Shopping Center—specifically the clause that prohibits the strip mall from renting to other sandwich restaurants. “We were surprised at the suit because we think it’s common sense that a burrito is not a sandwich,” Jeff Ackerman, owner of the Qdoba franchise group, told The Boston Globe.

The Worcester County Superior Court agreed. When the issue went before the court in 2006, Cambridge chef and food writer Christopher Schlesinger testified against Panera [PDF], saying, “I know of no chef or culinary historian who would call a burrito a sandwich. Indeed, the notion would be absurd to any credible chef or culinary historian.”

Justice Jeffrey A. Locke ruled that Qdoba would be allowed to move into the shopping center citing an entry in Merriam-Webster as the most damning evidence against Panera’s case. “The New Webster Third International Dictionary describes a ‘sandwich’ as ‘two thin pieces of bread, usually buttered, with a thin layer (as of meat, cheese, or savory mixture) spread between them,’” he said. “Under this definition and as dictated by common sense, this court finds that the term ‘sandwich’ is not commonly understood to include burritos, tacos, and quesadillas.”


If you want to know the definition of a certain dish, the officials at the U.S. Department of Agriculture are good people to ask. It’s their job to make sure that the nation’s supply of meat is correctly labeled. When it comes to sandwiches, the agency follows strict criteria. “A sandwich is a meat or poultry filling between two slices of bread, a bun, or a biscuit,” Mark Wheeler, who works in food and safety at the USDA, told NPR. His definition comes from the Food Standards and Labeling Policy Book used by the department (the USDA only covers the “labeling of meat, poultry, and egg products,” while the FDA handles everything else, which is why the USDA's definition excludes things like grilled cheese). Not included under their umbrella of foodstuff served between bread are burritos, wraps, and hot dogs.


The USDA’s definition may not be as simple and elegant as it seems. A sandwich is one thing, but a “sandwich-like product” is different territory. The same labeling policy book Mark Wheeler referred to when describing a sandwich lumps burritos into this vague category. Fajitas “may also be” a sandwich-like product, as long as the strips of meat in question come bundled in a tortilla. Another section of the book lists hot dogs and hamburgers as examples of sandwich-type products when laying out inspection policies for pre-packaged dinners. So is there an example of a meat-wrapped-in-carb dish that doesn’t belong to the sandwich family? Apparently strombolis are where the USDA draws the line. The Food Standards and Labeling Policy Book clearly states the product “is not considered a traditional sandwich” [PDF].


When it comes to sandwiches, New York doesn’t discriminate. In a bulletin outlining the state’s tax policy, a description of what constitutes a sandwich warrants its own subhead. The article reads:

“Sandwiches include cold and hot sandwiches of every kind that are prepared and ready to be eaten, whether made on bread, on bagels, on rolls, in pitas, in wraps, or otherwise, and regardless of the filling or number of layers. A sandwich can be as simple as a buttered bagel or roll, or as elaborate as a six-foot, toasted submarine sandwich.”

It then moves on to examples of taxable sandwiches. The list includes items widely-believed to bear the label, like Reubens, paninis, club sandwiches, and peanut butter and jelly sandwiches. Other entries, like burritos, gyros, open-faced sandwiches, and hot dogs, may cause confusion among diners.

Big Questions
Why Do Onions Make You Cry?

The onion has been traced back as far as the Bronze Age and was worshipped by the Ancient Egyptians (and eaten by the Israelites during their bondage in Egypt). Onions were rubbed over the muscles of Roman gladiators, used to pay rent in the Middle Ages, and eventually brought to the Americas, where today we fry, caramelize, pickle, grill, and generally enjoy them.

Many of us burst into tears when we cut into one, too. It's the price we pay for onion-y goodness. Here's a play-by-play breakdown of how we go from grabbing a knife to crying like a baby:

1. When you cut into an onion, its ruptured cells release all sorts of goodies, like allinase enzymes and amino acid sulfoxides. The former breaks the latter down into sulfenic acids.

2. The sulfenic acids, unstable bunch that they are, spontaneously rearrange into thiosulfinates, which produce a pungent odor and at one time got the blame for our tears. The acids are also converted by the LF-synthase enzyme into a gas called syn-propanethial-S-oxide, also known as the lachrymatory factor (or the crying factor).

3. Syn-propanethial-S-oxide moves through the air and reaches our eyes. The first part of the eye it meets, the cornea, is populated by autonomic motor fibers that lead to the lachrymal glands. When syn-propanethial-S-oxide is detected, all the fibers in the cornea start firing and tell the lachrymal glands to wash the irritant away.

4. Our eyes automatically start blinking and producing tears, which flushes the irritant away. Of course, our reaction to burning eyes is often to rub them, which only makes things worse since our hands also have some syn-propanethial-S-oxide on them.

It only takes about 30 seconds to start crying after you make the first cut; that's the time needed for syn-propanethial-S-oxide formation to peak.


The onion's relatives, like green onions, shallots, leeks and garlic, also produce sulfenic acids when cut, but they generally have fewer (or no) LF-synthase enzymes and don't produce syn-propanethial-S-oxide.


Since I usually go through a good deal of onions while cooking at home, I've been road testing some of the different methods the internet suggests for reducing or avoiding the effects of the lachrymatory factor. Here's what I tried:

Method #1: Chill or slightly freeze the onions before cutting, the idea being that this will change the chemical reactions and reduce the gas that is released.
Result: The onion from the fridge has me crying just as quickly as room temperature ones. The one that was in a freezer for 30 minutes leaves me dry-eyed for a bit, but by the time I'm done dicing my eyes start to burn a little.

Method #2: Cut fast! Get the chopping over with before the gas reaches your eyes.
Result: Just hacking away at the onion, I get in the frying pan without so much as a sting in my eyes. The onion looks awful, though. Doing a proper dice, I take a little too long and start tearing up. If you don't mind a mangled onion, this is the way to go.

Method #3: Put a slice of bread in your mouth, and cut the onion with most of the bread sticking out to "catch" the fumes.
Result: It seems the loaf of bread I have has gone stale. I stop the experiment and put bread on my shopping list.

Method #4: Chew gum while chopping. It keeps you breathing through your mouth, which keeps the fumes away from your eyes.
Result: This seems to work pretty well as long as you hold your head in the right position. Leaning toward the cutting board or looking right down at the onion puts your eyes right in the line of fire again.

Method #5: Cut the onions under running water. This prevents the gas from traveling up into the eyes.
Result: An onion in the sink is a hard onion to cut. I think Confucius said that. My leaky Brita filter is spraying me in the face and I'm terrified I'm going to cut myself, but I'm certainly not crying.

Method #6: Wear goggles.
Result: In an effort to maintain my dignity, I try my eyeglasses and sunglasses first. Neither do me any good. The ol' chemistry lab safety glasses make me look silly, but help a little more. I imagine swim goggles would really do the trick, but I don't have any.

Method #7: Change your onion. "Tear free" onions have been developed in the UK via special breeding and in New Zealand via "gene silencing" techniques.
Result: My nearest grocery store, Whole Foods, doesn't sell genetically modified produce or onions from England. Tonight, we eat leeks!

Have you got a Big Question you'd like us to answer? If so, let us know by emailing us at


More from mental floss studios