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46 Mouthwatering Facts About Pizza

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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 pizzas 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, Kans. 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.

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iStock // Ekaterina Minaeva
Man Buys Two Metric Tons of LEGO Bricks; Sorts Them Via Machine Learning
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iStock // Ekaterina Minaeva

Jacques Mattheij made a small, but awesome, mistake. He went on eBay one evening and bid on a bunch of bulk LEGO brick auctions, then went to sleep. Upon waking, he discovered that he was the high bidder on many, and was now the proud owner of two tons of LEGO bricks. (This is about 4400 pounds.) He wrote, "[L]esson 1: if you win almost all bids you are bidding too high."

Mattheij had noticed that bulk, unsorted bricks sell for something like €10/kilogram, whereas sets are roughly €40/kg and rare parts go for up to €100/kg. Much of the value of the bricks is in their sorting. If he could reduce the entropy of these bins of unsorted bricks, he could make a tidy profit. While many people do this work by hand, the problem is enormous—just the kind of challenge for a computer. Mattheij writes:

There are 38000+ shapes and there are 100+ possible shades of color (you can roughly tell how old someone is by asking them what lego colors they remember from their youth).

In the following months, Mattheij built a proof-of-concept sorting system using, of course, LEGO. He broke the problem down into a series of sub-problems (including "feeding LEGO reliably from a hopper is surprisingly hard," one of those facts of nature that will stymie even the best system design). After tinkering with the prototype at length, he expanded the system to a surprisingly complex system of conveyer belts (powered by a home treadmill), various pieces of cabinetry, and "copious quantities of crazy glue."

Here's a video showing the current system running at low speed:

The key part of the system was running the bricks past a camera paired with a computer running a neural net-based image classifier. That allows the computer (when sufficiently trained on brick images) to recognize bricks and thus categorize them by color, shape, or other parameters. Remember that as bricks pass by, they can be in any orientation, can be dirty, can even be stuck to other pieces. So having a flexible software system is key to recognizing—in a fraction of a second—what a given brick is, in order to sort it out. When a match is found, a jet of compressed air pops the piece off the conveyer belt and into a waiting bin.

After much experimentation, Mattheij rewrote the software (several times in fact) to accomplish a variety of basic tasks. At its core, the system takes images from a webcam and feeds them to a neural network to do the classification. Of course, the neural net needs to be "trained" by showing it lots of images, and telling it what those images represent. Mattheij's breakthrough was allowing the machine to effectively train itself, with guidance: Running pieces through allows the system to take its own photos, make a guess, and build on that guess. As long as Mattheij corrects the incorrect guesses, he ends up with a decent (and self-reinforcing) corpus of training data. As the machine continues running, it can rack up more training, allowing it to recognize a broad variety of pieces on the fly.

Here's another video, focusing on how the pieces move on conveyer belts (running at slow speed so puny humans can follow). You can also see the air jets in action:

In an email interview, Mattheij told Mental Floss that the system currently sorts LEGO bricks into more than 50 categories. It can also be run in a color-sorting mode to bin the parts across 12 color groups. (Thus at present you'd likely do a two-pass sort on the bricks: once for shape, then a separate pass for color.) He continues to refine the system, with a focus on making its recognition abilities faster. At some point down the line, he plans to make the software portion open source. You're on your own as far as building conveyer belts, bins, and so forth.

Check out Mattheij's writeup in two parts for more information. It starts with an overview of the story, followed up with a deep dive on the software. He's also tweeting about the project (among other things). And if you look around a bit, you'll find bulk LEGO brick auctions online—it's definitely a thing!

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Cs California, Wikimedia Commons // CC BY-SA 3.0
How Experts Say We Should Stop a 'Zombie' Infection: Kill It With Fire
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Cs California, Wikimedia Commons // CC BY-SA 3.0

Scientists are known for being pretty cautious people. But sometimes, even the most careful of us need to burn some things to the ground. Immunologists have proposed a plan to burn large swaths of parkland in an attempt to wipe out disease, as The New York Times reports. They described the problem in the journal Microbiology and Molecular Biology Reviews.

Chronic wasting disease (CWD) is a gruesome infection that’s been destroying deer and elk herds across North America. Like bovine spongiform encephalopathy (BSE, better known as mad cow disease) and Creutzfeldt-Jakob disease, CWD is caused by damaged, contagious little proteins called prions. Although it's been half a century since CWD was first discovered, scientists are still scratching their heads about how it works, how it spreads, and if, like BSE, it could someday infect humans.

Paper co-author Mark Zabel, of the Prion Research Center at Colorado State University, says animals with CWD fade away slowly at first, losing weight and starting to act kind of spacey. But "they’re not hard to pick out at the end stage," he told The New York Times. "They have a vacant stare, they have a stumbling gait, their heads are drooping, their ears are down, you can see thick saliva dripping from their mouths. It’s like a true zombie disease."

CWD has already been spotted in 24 U.S. states. Some herds are already 50 percent infected, and that number is only growing.

Prion illnesses often travel from one infected individual to another, but CWD’s expansion was so rapid that scientists began to suspect it had more than one way of finding new animals to attack.

Sure enough, it did. As it turns out, the CWD prion doesn’t go down with its host-animal ship. Infected animals shed the prion in their urine, feces, and drool. Long after the sick deer has died, others can still contract CWD from the leaves they eat and the grass in which they stand.

As if that’s not bad enough, CWD has another trick up its sleeve: spontaneous generation. That is, it doesn’t take much damage to twist a healthy prion into a zombifying pathogen. The illness just pops up.

There are some treatments, including immersing infected tissue in an ozone bath. But that won't help when the problem is literally smeared across the landscape. "You cannot treat half of the continental United States with ozone," Zabel said.

And so, to combat this many-pronged assault on our wildlife, Zabel and his colleagues are getting aggressive. They recommend a controlled burn of infected areas of national parks in Colorado and Arkansas—a pilot study to determine if fire will be enough.

"If you eliminate the plants that have prions on the surface, that would be a huge step forward," he said. "I really don’t think it’s that crazy."

[h/t The New York Times]