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13 Mummified Facts about Ötzi the Iceman

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When hikers in the Ötztal Alps stumbled on a body melting out of a glacier in September 1991, they thought they had found an unfortunate mountaineer who had disappeared perhaps a couple decades prior. But as soon as it was revealed that the mummified remains dated back 5300 years—and that the man had been murdered by an arrow to the back—researchers knew they had to solve the most fascinating ancient forensic case ever found. Nicknamed Ötzi, the Iceman, and Frozen Fritz, the body of a man who was around 40–50 years old when he died in the Copper Age continues to generate new data about a past era and shows links to contemporary people. In honor of the 25th anniversary of his discovery, here are 13 surprising facts about Ötzi.

1. TWO COUNTRIES FOUGHT OVER HIM.

Ötzi might very well be the oldest person ever subject to a custody dispute. He was discovered in a part of the Alps mountain range that is right on the border between Austria and Italy. Complicating the find is the fact that the glacier in which he was entombed for millennia has shrunk since the official country border was established in 1919. This means that, although the find site of the mummy drains into Austria, the place Ötzi was actually resting is about 100 meters into Italian territory. Originally, Ötzi was studied at Innsbruck University in Austria, but since 1998 he has been displayed and studied at the South Tyrol Museum of Archaeology in Bolzano, Italy.

2. HIS DEATH MAY HAVE BEEN RECORDED.

In 1991, an upright, carved stone was found in the town of Laces, near the Ötztal Alps where the Iceman was discovered. Although the stone was reused in modern times for the altar of a church, it dates to the Copper Age, just like Ötzi. One of the carvings on it depicts an archer shooting an arrow into the back of an unarmed man—which bears striking similarities to how scientists know Ötzi died. This circumstantial evidence, though, has not convinced most researchers.

3. HE WAS SICK BEFORE HE WAS KILLED.

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Even though Ötzi was comparatively old when he died, he was not exactly healthy. Whipworm parasite eggs were found in his gut contents, so he probably suffered from nausea, vomiting, and diarrhea. His body also produced a full genome of H. pylori, a common stomach bug responsible for ulcers and other tummy troubles. There is also evidence that he had ingested a medicinal herb called hop hornbeam shortly before his death, possibly to help his indigestion. And one fingernail was found to have Beau’s lines, which are created when the immune system is compromised. Ötzi’s fingernail shows he was seriously ill several times in the four months prior to death.

4. HE CARRIED A FIRST AID KIT.

Since Ötzi died while going about his daily life, the artifacts found with him give us a snapshot in time. Two particularly curious objects were spheres of botanical material about the size of walnuts that were strung on leather straps. Analysis of the masses indicated they were a fungus called Piptoporus betulinus. Notably, this fungus—if eaten—both causes diarrhea and can protect against certain mycobacteria. It is likely that Ötzi was ingesting this fungus in an attempt to treat his whipworm—the diarrheal action would have helped him get rid of the parasite’s eggs, while the antibiotic properties of the fungus would have killed off other intestinal bugs. Fungi like this were used for medicinal purposes until the 20th century.

5. HE HOLDS THE RECORD FOR OLDEST TATTOOS IN THE WORLD.

The mummy boasts 61 different tattoos, and they are the oldest physical evidence of tattooing in the world. While the Iceman does not have "MOM" on his biceps or a butterfly on his lower back, his tattoos are still quite interesting. They were made by scratching his skin and rubbing charcoal in the fresh wound, resulting in groups of lines or crosses. It has also been suggested that their placement over joints may have been an attempt to treat pain. As the oldest tattooed person ever found, Ötzi holds a Guinness World Record.

6. HE WORE A VARIETY OF LEATHERS AND HIDES.

Long before Dolce & Gabbana dressed dapper Italian men, Ötzi was mixing materials to create his clothing. A study published this August finally revealed the variety of species used to make Ötzi’s outfit. He wore a loincloth of sheepskin, leggings and a coat of goat hide, and a brown bear-skin hat. Even his accessories were diverse: His shoelaces came from wild cows and his quiver from roe deer.

7. HE WAS AN EARLY ADOPTER OF TECHNOLOGY.

Ötzi’s field kit held a surprising number of different tools. There was a copper-bladed axe, which marks him as high status; a flint dagger and its tree-fiber sheath; and a bow made out of a yew tree. His quiver, fashioned out of deer hide with hazel wood supports, contained two finished arrows and a dozen unfinished shafts. He had a net for catching rabbits and birds, as well as a marble disc with a hole in the middle for hanging or carrying dead fowls. He also carried cylindrical containers made of birch bark—a kind of Copper Age Tupperware that kept charcoal embers hot for hours so he could quickly make a fire. His teeth were worn particularly on the left side, meaning he may have used his mouth to help work leather. The Iceman’s hair also revealed high levels of arsenic, suggesting he was a pro at smelting ores to make copper.

8. HE WAS A CHALCOLITHIC RAMBO.

Ötzi was short and stocky, around 5’2” tall and 135 lbs, with strong legs. In 2003, an early study of DNA from Ötzi and his belongings claimed to find blood from four different individuals—there was some on his dagger, on his goatskin coat, and on one of the arrows. This finding was never published, though, and has not been replicated since. But other evidence for combat exists in the form of two injuries. Several right-sided rib fractures had healed before death. Shortly before his death, Ötzi was struck in the head. A protein analysis of his brain reveals some healing, particularly in the form of blood clots—but those could have caused a stroke or embolism. The Iceman also suffered a long, deep stab wound to his right hand. Based on the stage of healing evident from the wound tissue, it occurred between 3 to 8 days before his death. And of course, the arrow lodged in his left shoulder was likely the ultimate cause of death. In short, Ötzi was a hunter and a fighter.

9. ÖTZI WAS NOT A VEGETARIAN.

The Iceman’s stomach contents revealed both his last meal and the meal before that. DNA analysis published in 2002 was based on samples of digested food collected from his colon. Ötzi’s second-to-last meal consisted of ibex meat along with various species of cereals and dicots (a group of flowering plants), while for his last meal, he dined on red deer meat and either grasses or cereals. The discovery of red deer in his gut is especially interesting, since depictions of that animal figure prominently in archaeological finds throughout the Alps in this time period.

10. THE ICEMAN HAD A GAP-TOOTHED SMILE AND OTHER BODILY ANOMALIES.

Between Ötzi’s top two teeth is a natural diastema, which is the anatomical term for a gap in the teeth. Among modern adults, about 10–20 percent have this gap. Researchers also saw in the Iceman’s mouth third molar agenesis—the anatomical term for lacking wisdom teeth. Around 35 percent of people today lack wisdom teeth. Ötzi was also missing some bones—the smallest of the ribs on either side. This lack of ribs is not unheard of, but it only affects about 5 percent of the population.

11. YOU COULD BE RELATED TO ÖTZI, BUT ONLY IF YOU'RE A GUY.

The Iceman’s genome was sequenced in 2012, revealing he had brown eyes and O-type blood, was lactose intolerant, and likely had Lyme disease. The mutations in Ötzi’s paternal genetic line are most commonly found in Sardinia and Corsica today, meaning those areas likely have descendants of his genetic family. Another study in 2013 tested thousands of modern men in the Alps and discovered that 19 modern men in the sample shared a genetic lineage with the Iceman. His maternal DNA line, however, appears to be extinct. So if you’re a guy and your ancestors go back to this roughly 620-mile band between Sardinia and the Alps, there's a chance you could be related to Ötzi.

12. ÖTZI IS CURSED.

We all know that every ancient mummy is cursed, so of course the Iceman has his own story. In 2005, rumors circulated that the deaths of at least five people may have been related to a mummy’s curse. One of the tourists who initially spotted the Iceman died falling off the side of a mountain. An Alpine guide who airlifted the mummy out died in an avalanche. A journalist who filmed the recovery of the mummy died of a brain tumor. A forensic expert who touched Ötzi with his bare hands died in a car accident en route to a conference to talk about the mummy. Even the death of the head of the research team at Innsbruck University has been attributed to Ötzi’s curse, in spite of the fact it was from multiple sclerosis. There is, of course, no evidence that these deaths are related to anything other than bad luck, coincidence, or the fact that, well, everybody dies eventually.

13. HE HAS 3D SELFIES.

One of the trends in 3D scanning and printing is to make a selfie or a replica bust of yourself, and Ötzi is no stranger this trend. The mummy has been thoroughly CT scanned over the years for analysis. Earlier this year, those CT scans were meshed with digital photographs, 3D printed, and then painted to create three life-size Ötzi clones. The Iceman’s first two 3D prints are on display at the DNA Learning Center at Cold Spring Harbor Laboratory, in Cold Spring Harbor, New York, along with 3D printed bones from his body. The third life-size print is being used in a traveling exhibit; its first stop, in fall 2017, will be the North Carolina Museum of Natural Science. Eventually, this traveling Ötzi replica will find its way back to the South Tyrol Museum of Archaeology to be with the real migratory hunter-herder, whose own journey has lasted more than 50 centuries.

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New Plankton Species Named After Sir David Attenborough Series Blue Planet
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John Phillips, Getty Images for Tourism Australia

At least 19 creatures, both living and extinct, have been named after iconic British naturalist Sir David Attenborough. Now, for the first time, one of his documentary series will receive the same honor. As the BBC reports, a newly discovered phytoplankton shares its name with the award-winning BBC series Blue Planet.

The second half of the species' name, Syracosphaera azureaplaneta, is Latin for "blue planet," likely making it the first creature to derive its name from a television program. The single-cell organisms are just thousandths of a millimeter wide, thinner than a human hair, but their massive blooms on the ocean's surface can be seen from space. Called coccolithophores, the plankton serve as a food source for various marine life and are a vital marker scientists use to gauge the effects of climate change on the sea. The plankton's discovery, by researchers at University College London (UCL) and institutions in Spain and Japan, is detailed in a paper [PDF] published in the Journal of Nannoplankton Research.

"They are an essential element in the whole cycle of oxygen production and carbon dioxide and all the rest of it, and you mess about with this sort of thing, and the echoes and the reverberations and the consequences extend throughout the atmosphere," Attenborough said while accepting the honor at UCL.

The Blue Planet premiered in 2001 with eight episodes, each dedicated to a different part of the world's oceans. The series' success inspired a sequel series, Blue Planet II, that debuted on the BBC last year.

[h/t BBC]

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5 Ways You Do Complex Math in Your Head Without Realizing It
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The one thing that people who love math and people who hate math tend to agree on is this: You're only really doing math if you sit down and write formal equations. This idea is so widely embraced that to suggest otherwise is "to start a fight," says Maria Droujkova, math educator and founder of Natural Math, a site for kids and parents who want to incorporate math into their daily lives. Mathematicians cherish their formal proofs, considering them the best expression of their profession, while the anti-math don't believe that much of the math they studied in school applies to "real life."

But in reality, "we do an awful lot of things in our daily lives that are profoundly mathematical, but that may not look that way on the surface," Christopher Danielson, a Minnesota-based math educator and author of a number of books, including Common Core Math for Parents for Dummies, tells Mental Floss. Our mathematical thinking includes not just algebra or geometry, but trigonometry, calculus, probability, statistics, and any of the at least 60 types [PDF] of math out there. Here are five examples.

1. COOKING // ALGEBRA

Of all the maths, algebra seems to draw the most ire, with some people even writing entire books on why college students shouldn't have to endure it because, they claim, it holds the students back from graduating. But if you cook, you're likely doing algebra. When preparing a meal, you often have to think proportionally, and "reasoning with proportions is one of the cornerstones of algebraic thinking," Droujkova tells Mental Floss.

You're also thinking algebraically whenever you're adjusting a recipe, whether for a larger crowd or because you have to substitute or reduce ingredients. Say, for example, you want to make pancakes, but you only have two eggs left and the recipe calls for three. How much flour should you use when the original recipe calls for one cup? Since one cup is 8 ounces, you can figure this out using the following algebra equation: n/8 : 2/3.

algebraic equation illustrates adjustment of a recipe
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However, when thinking proportionally, you can just reason that since you have one-third less eggs, you should just use one-third less flour.

You're also doing that proportional thinking when you consider the cooking times of the various courses of your meal and plan accordingly so all the elements of your dinner are ready at the same time. For example, it will usually take three times as long to cook rice as it will a flattened chicken breast, so starting the rice first makes sense.

"People do mathematics in their own way," Droujkova says, "even if they cannot do it in a very formalized way."

2. LISTENING TO MUSIC // PATTERN THEORY AND SYMMETRY

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The making of music involves many different types of math, from algebra and geometry to group theory and pattern theory and beyond, and a number of mathematicians (including Pythagoras and Galileo) and musicians have connected the two disciplines (Stravinsky claimed that music is "something like mathematical thinking").

But simply listening to music can make you think mathematically too. When you recognize a piece of music, you are identifying a pattern of sound. Patterns are a fundamental part of math; the branch known as pattern theory is applied to everything from statistics to machine learning.

Danielson, who teaches kids about patterns in his math classes, says figuring out the structure of a pattern is vital for understanding math at higher levels, so music is a great gateway: "If you're thinking about how two songs have similar beats, or time signatures, or you're creating harmonies, you're working on the structure of a pattern and doing some really important mathematical thinking along the way."

So maybe you weren't doing math on paper if you were debating with your friends about whether Tom Petty was right to sue Sam Smith in 2015 over "Stay With Me" sounding a lot like "I Won't Back Down," but you were still thinking mathematically when you compared the songs. And that earworm you can't get out of your head? It follows a pattern: intro, verse, chorus, bridge, end.

When you recognize these kinds of patterns, you're also recognizing symmetry (which in a pop song tends to involve the chorus and the hook, because both repeat). Symmetry [PDF] is the focus of group theory, but it's also key to geometry, algebra, and many other maths.

3. KNITTING AND CROCHETING // GEOMETRIC THINKING

six steps of crocheting a hyperbolic plane
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Droujkova, an avid crocheter, she says she is often intrigued by the very mathematical discussions fellow crafters have online about the best patterns for their projects, even if they will often insist they are awful at math or uninterested in it. And yet, such crafts cannot be done without geometric thinking: When you knit or crochet a hat, you're creating a half sphere, which follows a geometric formula.

Droujkova isn't the only math lover who has made the connection between geometry and crocheting. Cornell mathematician Daina Taimina found crocheting to be the perfect way to illustrate the geometry of a hyperbolic plane, or a surface that has a constant negative curvature, like a lettuce leaf. Hyperbolic geometry is also used in navigation apps, and explains why flat maps distort the size of landforms, making Greenland, for example, look far larger on most maps than it actually is.

4. PLAYING POOL // TRIGONOMETRY

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If you play billiards, pool, or snooker, it's very likely that you are using trigonometric reasoning. Sinking a ball into a pocket by using another ball involves understanding not just how to measure angles by sight but triangulation, which is the cornerstone of trigonometry. (Triangulation is a surprisingly accurate way to measure distance. Long before powered flight was possible, surveyors used triangulation to measure the heights of mountains from their bases and were off by only a matter of feet.)

In a 2010 paper [PDF], Louisiana mathematician Rick Mabry studied the trigonometry (and basic calculus) of pool, focusing on the straight-in shot. In a bar in Shreveport, Louisiana, he scribbled equations on napkins for each shot, and he calculated the most difficult straight-in shot of all. Most experienced pool players would say it’s one where the target ball is halfway between the pocket and the cue ball. But that, according to Mabry’s equations, turned out not to be true. The hardest shot of all had a surprising feature: The distance from the cue ball to the pocket was exactly 1.618 times the distance from the target ball to the pocket. That number is the golden ratio, which is found everywhere in nature—and, apparently, on pool tables.

Do you need to consider the golden ratio when deciding where to place the cue ball? Nope, unless you want to prove a point, or set someone else up to lose. You're doing the trig automatically. The pool sharks at the bar must have known this, because someone threw away Mabry's math napkins.

5. RE-TILING THE BATHROOM // CALCULUS

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Many students don't get to calculus in high school, or even in college, but a cornerstone of that branch of math is optimization—or figuring out how to get the most precise use of a space or chunk of time.

Consider a home improvement project where you're confronted with tiling around something whose shape doesn't fit a geometric formula like a circle or rectangle, such as the asymmetric base of a toilet or freestanding sink. This is where the fundamental theorem of calculus—which can be used to calculate the precise area of an irregular object—comes in handy. When thinking about how those tiles will best fit around the curve of that sink or toilet, and how much of each tile needs to be cut off or added, you're employing the kind of reasoning done in a Riemann sum.

Riemann sums (named after a 19th-century German mathematician) are crucial to explaining integration in calculus, as tangible introductions to the more precise fundamental theorem. A graph of a Riemann sum shows how the area of a curve can be found by building rectangles along the x, or horizontal axis, first up to the curve, and then over it, and then averaging the distance between the over- and underlap to get a more precise measurement. 

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