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5 Animal Byproducts That Are Also Expensive Delicacies

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When it comes to animal byproducts, one man’s trash truly is another man’s treasure.

1. Snail Caviar

Price Tag: $139.00 per 75-gram jar
Pair With: Beets, black pudding, and beef.

Free-range “happy snails” at the Aylesbury Escargots outdoor Snail Park go where they like, enjoying daily sprinkler showers and a diet of fresh leaves and biscuits. Come mating time, the hermaphroditic snails pair up, swap sperm, and lay about 100 tiny, pearly eggs each. Snail farmer Sophie Wharton then collects, sorts, and cleans the eggs by hand. The Escargot Pearls, as the Whartons call them, have a “slightly earthy, ferny taste.”

2. Elephant Poop Coffee

Price Tag: $50.00 per cup
Pair With: Chocolate, carrot cake, and raisins.

Some people look at a pile of elephant dung and see a pile of elephant dung. The folks at the Black Ivory Coffee Company see a fortune. Building on the well-established and super-gross model of civet poop coffee, Black Ivory coffee is “naturally refined” in the digestive tracts of rescued elephants in Thailand. According to Black Ivory developer Blake Dinkin, the elephants’ digestive processes break down the proteins that make coffee so bitter, and the fermentation in their stomachs imparts “flavors you wouldn’t get in other coffee.” No kidding.

3. Fish Sperm

Kirk K, Flickr // CC BY-NC-ND 2.0

Price Tag: Market price.
Best Served: Steamed in miso soup with seaweed, raw with ponzu sauce, or tempura-style.

The culinary term for fish sperm sacs is “milt.” In Japan, this delicacy is known as shirako, or “white children”—a pretty poetic euphemism for something kinda gross. Shirako is eaten for its creamy, custard-like consistency, its light, delicate taste, and its supposed powers as an aphrodisiac.

Most shirako comes from cod, anglerfish, or salmon, and is pretty inexpensive. Then there’s fugu no shirako, the milt from the ridiculously deadly pufferfish. Chefs have to undergo a rigorous training and certification program to even prepare fugu, and even then, accidents happen. Safely serving fugu shirako is a tricky job, which means that even finding a chef who will serve you “white children” is incredibly rare and very expensive.

4. Donkey Cheese

Price Tag: $1000.00 per pound
Best Served: Alone, in thin slices.

High in the mountains of Serbia, deep in the Zasavica nature reserve, 100 endangered Balkan donkeys and a few humans are hard at work making the most expensive cheese in the world. The jennies (female donkeys) are milked by hand three times a day, because, astonishingly, there is no such thing as a donkey-milking machine. It’s hardly an efficient process: From three gallons of hard-won donkey milk, the cheesemakers will get about a pound of pule, or smoked donkey cheese.

Pule’s appeal is due in part to its rarity, in part to its reputation as a superfood, and in part to national pride. In 2012, claims surfaced that tennis superstar Novak Djokovic had purchased the entire world supply of pule for his chain of restaurants. The story was later debunked, but Djokovic was inspired. “As I understand it,” he told the press, “it is incredible quality. I have not tried it yet, but I am looking forward to it."

5. Sea Urchin Gonads

Price Tag Market price
Best Served: Raw atop crackers and cheese, in sushi, or mixed into pasta sauce.

They’re eaten all around the world. At the sushi bar, they’re called uni, which is usually translated as “sea urchin roe.” This is not quite accurate. Uni’s vibrant saffron color and rich, creamy texture belong not to the urchin’s eggs, but to its gonads. And what magical ‘nads they are.

Some diners are repulsed by the urchin’s smooshiness. For many others, a mouthful of sea urchin junk is a ticket to bliss-town. Texture and flavor can only claim part of the credit: Urchin gonads also naturally contain the euphoria-producing cannabinoid anandamide.

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Afternoon Map
From Snoopy to Shark Bait: The Top Slang Word in Each State
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There’s a minute, and then there’s a hot minute. Defined as “a longish amount of time,” this unit of time is familiar to Alabamians but may stir up confusion beyond the state’s borders.

It’s Louisianans, though, who feel the “most misunderstood,” according to the results of a survey regarding regional slang by PlayNJ. Of the Louisiana residents surveyed, 72 percent said their fellow Americans from other states—even neighboring ones—have a hard time grasping their lingo. Some learned the hard way that ordering a burger “dressed” (with lettuce, tomato, pickles, and mayo) isn’t universally understood, nor is the phrase “to pass a good time” (instead of “to have” a good time).

After surveying 2000 people (with proportional numbers from each state), PlayNJ created a map showing the top slang word in each state. Many are words that are unlikely to be understood beyond state lines, but others—like California’s bomb (something you really like) and New York’s deadass (to be completely serious)—have spread well beyond their respective borders thanks to memes and internet culture.

Hawaiians are also known for their distinctive slang words, with 71 percent reporting that words like shaka (hello) and poho (waste of time) are frequently misunderstood. Shark bait, one of the state’s more colorful terms, refers to tourists who are so pale that they attract sharks.

Check out the full list below and test your knowledge of regional slang words with PlayNJ’s online quiz.

A chart showing the top slang words in each state
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The Body
10 Facts About the Appendix
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Illustration by Mental Floss / Images: iStock

Despite some 500 years of study, the appendix might be one of the least understood structures in the human body. Here's what we know about this mysterious organ.

1. THE ANCIENT EGYPTIANS CALLED IT THE "WORM" OF THE BOWEL.

The human appendix is small, tube-shaped, and squishy, giving ancient Egyptians, who encountered it when preparing bodies for funerary rites, the impression of a worm. Even today, some medical texts refer to the organ as vermiform—Latin for "worm-like."

2. THE APPENDIX SHOWS UP IN LEONARDO DA VINCI’S DRAWINGS.

The earliest description of a human appendix was written by the Renaissance physician-anatomist Jacopo Berengario da Carpi in 1521. But before that, Leonardo da Vinci is believed to drawn the first depiction of the organ in his anatomical drawings in 1492. Leonardo claimed to have dissected 30 human corpses in his effort to understand the way the body worked from mechanical and physiological perspectives.

3. IT'S ABOUT THE SIZE OF A PINKY FINGER.

The appendix is a small pouch connected to the cecum—the beginning of the large intestine in the lower right-hand corner of your abdomen. The cecum’s job is to receive undigested food from the small intestine, absorb fluids and salts that remain after food is digested, and mix them with mucus for easier elimination; according to Mohamad Abouzeid, M.D., assistant professor and attending surgeon at NYU Langone Medical Center, the cecum and appendix have similar tissue structures.

4. CHARLES DARWIN THOUGHT IT WAS A VESTIGIAL ORGAN …

The appendix has an ill-deserved reputation as a vestigial organ—meaning that it allegedly evolved without a detectable function—and we can blame Charles Darwin for that. In the mid-19th century, the appendix had been identified only in humans and great apes. Darwin thought that our earlier ancestors ate mostly plants, and thus needed a large cecum in which to break down the tough fibers. He hypothesized that over time, apes and humans evolved to eat a more varied and easier-to-digest diet, and the cecum shrank accordingly. The appendix itself, Darwin believed, emerged from the folds of the wizened cecum without its own special purpose.

5. … BUT THE APPENDIX PROBABLY EVOLVED TO HELP IMMUNE FUNCTION.

The proximity and tissue similarities between the cecum and appendix suggest that the latter plays a part in the digestive process. But there’s one noticeable difference in the appendix that you can see only under a microscope. “[The appendix] has a high concentration of the immune cells within its walls,” Abouzeid tells Mental Floss.

Recent research into the appendix's connection to the immune system has suggested a few theories. In a 2015 study in Nature Immunology, Australian researchers discovered that a type of immune cells called innate lymphoid cells (ILCs) proliferate in the appendix and seem to encourage the repopulation of symbiotic bacteria in the gut. This action may help the gut recover from infections, which tend to wipe out fluids, nutrients, and good bacteria.

For a 2013 study examining the evolutionary rationale for the appendix in mammal species, researchers at Midwestern University and Duke University Medical Center concluded that the organ evolved at least 32 times among different lineages, but not in response to dietary or environmental factors.

The same researchers analyzed 533 mammal species for a 2017 study and found that those with appendices had more lymphatic (immune) tissue in the cecum. That suggests that the nearby appendix could serve as "a secondary immune organ," the researchers said in a statement. "Lymphatic tissue can also stimulate growth of some types of beneficial gut bacteria, providing further evidence that the appendix may serve as a 'safe house' for helpful gut bacteria." This good bacteria may help to replenish healthy flora in the gut after infection or illness.

6. ABOUT 7 PERCENT OF AMERICANS WILL GET APPENDICITIS DURING THEIR LIFETIMES.

For such a tiny organ, the appendix gets infected easily. According to Abouzeid, appendicitis occurs when the appendix gets plugged by hardened feces (called a fecalith or appendicolith), too much mucus, or the buildup of immune cells after a viral or bacterial infection. In the United States, the lifetime risk of getting appendicitis is one in 15, and incidence in newly developed countries is rising. It's most common in young adults, and most dangerous in the elderly.

When infected, the appendix swells up as pus fills its interior cavity. It can grow several times larger than its average 3-inch size: One inflamed appendix removed from a British man in 2004 measured just over 8 inches, while another specimen, reported in 2007 in the Journal of Clinical Pathology, measured 8.6 inches. People with appendicitis might feel generalized pain around the bellybutton that localizes on the right side of the abdomen, and experience nausea or vomiting, fever, or body aches. Some people also get diarrhea.

7. APPENDECTOMIES ARE ALMOST 100 PERCENT EFFECTIVE FOR TREATING APPENDICITIS.

Treatment for appendicitis can go two ways: appendectomy, a.k.a. surgical removal of the appendix, or a first line of antibiotics to treat the underlying infection. Appendectomies are more than 99 percent effective against recurring infection, since the organ itself is removed. (There have been cases of "stump appendicitis," where an incompletely removed appendix becomes infected, which often require further surgery.)

Studies show that antibiotics produce about a 72 percent initial success rate. “However, if you follow these patients out for about a year, they often get recurrent appendicitis,” Abouzeid says. One 2017 study in the World Journal of Surgery followed 710 appendicitis patients for a year after antibiotic treatment and found a 26.5 percent recurrence rate for subsequent infections.

8. AN INFECTED APPENDIX DOESN’T ACTUALLY BURST.

You might imagine a ruptured appendix, known formally as a perforation, being akin to the "chestbuster" scene in Alien. Abouzeid says it's not quite that dramatic, though it can be dangerous. When the appendix gets clogged, pressure builds inside the cavity of the appendix, called the lumen. That chokes off blood supply to certain tissues. “The tissue dies off and falls apart, and you get perforation,” Abouzeid says. But rather than exploding, the organ leaks fluids that can infect other tissues.

A burst appendix is a medical emergency. Sometimes the body can contain the infection in an abscess, Abouzeid says, which may be identified through CT scans or X-rays and treated with IV antibiotics. But if the infection is left untreated, it can spread to other parts of the abdomen, a serious condition called peritonitis. At that point, the infection can become life-threatening.

9. SURGEONS CAN REMOVE AN APPENDIX THROUGH A TINY INCISION.

In 1894, Charles McBurney, a surgeon at New York's Roosevelt Hospital, popularized an open-cavity, muscle-splitting technique [PDF] to remove an infected appendix, which is now called an open appendectomy. Surgeons continued to use McBurney's method until the advent of laparoscopic surgery, a less invasive method in which the doctor makes small cuts in the patient's abdomen and threads a thin tube with a camera and surgical tools into the incisions. The appendix is removed through one of those incisions, which are usually less than an inch in length.

The first laparoscopic appendectomies were performed by German physician Kurt Semm in the early 1980s. Since then, laparoscopic appendectomies have become the standard treatment for uncomplicated appendicitis. For more serious infections, open appendectomies are still performed.

10. AN APPENDIX ONCE POSTPONED A ROYAL CORONATION.

When the future King Edward VII of Great Britain came down with appendicitis (or "perityphlitis," as it was called back then) in June 1902, mortality rates for the disease were as high as 26 percent. It was about two weeks before his scheduled coronation on June 26, 1902, and Edward resisted having an appendectomy, which was then a relatively new procedure. But surgeon and appendicitis expert Frederick Treves made clear that Edward would probably die without it. Treves drained Edward's infected abscess, without removing the organ, at Buckingham Palace; Edward recovered and was crowned on August 9, 1902.

11. THE WORLD'S LONGEST APPENDIX MEASURED MORE THAN 10 INCHES.

On August 26, 2006, during an autopsy at a Zagreb, Croatia hospital, surgeons obtained a 10.24-inch appendix from 72-year-old Safranco August. The deceased currently holds the Guinness World Record for "largest appendix removed."

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