11 Secrets of Volcanologists

United Nations Photo, Flickr // CC BY-NC-ND 2.0. Image cropped.
United Nations Photo, Flickr // CC BY-NC-ND 2.0. Image cropped.

Around the world, over 600 million people live near one of 1500 active terrestrial volcanoes. Who's keeping them safe from potential future eruptions? The women and men who study these gas-and-ash-and-lava belching windows into the center of the earth: volcanologists.

You might not be sure what volcanologists do or why they matter—especially if you live thousands of miles away from one of these fiery mountains. So, Mental Floss went searching for answers from four volcanologists working in various capacities around the country, who shared their experiences in the field, under the ocean, and gazing far out into space.

1. THEY STUDY EVERYTHING FROM MAGMA COMPOSITION TO VOLCANIC GASSES AND BEYOND.

A volcanologist takes gas emission measurements during an assessment mission inside the crater at Mount Nyamulagira
United Nations Photo, Flickr // CC BY-NC-ND 2.0

"When I tell people what I do, 95 percent of the time they ask, 'What is that?'" says Arianna Soldati of the University of Missouri, who researches lava flows.

Volcanology is the study of how volcanoes form, what they're made of, and what they eject, among other areas of research. Many volcanologists have degrees in geology; some, like Soldati, are physical geologists, collecting samples on site and then analyzing them to figure out their composition. Others are geophysicists who study tectonic plates and their role in volcanic eruptions and earthquakes. Geochemists and petrologists study volcanic gasses and minerals, and geodesists look at deformations on and around volcanoes to figure out if magma is pooling up underneath them. All these disparate disciplines work together, Soldati says, to "understand how the planet works, so we can understand how eruptions work."

2. THEY WORK WITH OTHER VOLCANOLOGISTS AROUND THE GLOBE IN THE NAME OF SAFETY.

Jacob Lowenstern is Chief of the Volcano Disaster Assistance Program at the United States Geological Survey (USGS), a government agency that monitors our country's 169 active land volcanoes, largely via observatories in Hawaii, Alaska, Washington, and Oregon. But it also offers assistance and training to volcanologists in other countries because, as Lowenstern points out, an active volcano system respects no human borders. The program helps keep people and animals safe from the destruction wrought by lava flows, mudslides, and gas: When eruptions happen, localities issue alerts based on data from USGS.

Underwater volcanoes can create shipping hazards, like floating chunks of pumice, but a land-based volcano can create serious chaos worldwide. When Iceland's Eyjafjallajökull erupted in 2010, its miles-high ash cloud grounded aircraft to and from Europe and Britain for about a week. "We didn't even know what concentration of ash it was safe to fly through, because no one had studied it before," Soldati says. (They do know now, although the answer depends on how long the aircraft is aloft [PDF]). Back when Tambora erupted in Indonesia in 1815, it kicked off the Year Without a Summer, as ash circled the globe and blocked out the Sun, resulting in crop failures, famine, and a total of 100,000 human deaths. "At some point, something truly global [like that] is going to happen again," Lowenstern says. Volcanologists aim to be prepared.

3. SOME OF THEM WORK UNDERWATER ...

An estimated 80 percent of eruptions happen beneath the oceans' waves. It hasn't been easy for volcanologists to research them—for starters, there was no comprehensive map of the ocean floor until just a few years ago. And not being able to see a volcano that's 3000 feet underwater makes observation … challenging. Historically, scientists mostly monitored underwater volcano activity using fickle, battery-operated equipment installed on the seafloor, which could only store (rather than transmit) data. The first complete footage of an underwater eruption wasn't captured till 2009.

William Wilcock says technology has finally caught up to the thirst for information. He studies the Pacific Ocean's Axial Seamount—the most active volcano in the Northeast Pacific—via the Cabled Array ocean observatory, 550 miles of fiber-optic cable equipped with sensors that allow scientists to to monitor the Juan de Fuca ridge off of Oregon's coast. Using the array, they can monitor the chemicals and temperature in the water column, measure the volcano's magma chamber, and keep tabs on earthquakes, which could signify an eruption.

The array sends underwater volcanologists data in real time—fast enough that they can sometimes deploy autonomous vehicles for a closer look at eruptions as they happen. In April 2015, the project's team was able to witness an entire eruption of Axial Seamount from start to finish, leading to “the most detailed observations ever made” of an undersea volcano, as Wilcock told The Washington Post. The data they gleaned helped them understand how the seamount's caldera falls during eruptions and then reinflates with gases and magma before reaching a particular threshold, at which it erupts. Understanding how that inflation works is important for land volcanoes too, which is part of why data from the array is posted on the internet for scientists around the world to use.

4. ... AND SOME STUDY VOLCANOES IN SPACE.

The cloud-covered Mayon volcano spews ash as it erupts near the Philippines
ROMEO GACAD/AFP/Getty Images

The only scientist NASA sent to the moon was geologist Harrison “Jack” Schmitt, who flew on Apollo 17. (All of the other astronauts were military men-turned-NASA test pilots.) Schmitt—who was actually allergic to regolith, a.k.a. moon dust—helped prove that the moon was once volcanically active. This fact makes NASA's Alex Sehlke incredibly proud—and envious. He's a volcanologist who conducts research in Idaho's Craters of the Moon National Monument in preparation for the agency's planned return there in a few years. Craters of the Moon is geologically similar to our actual moon, in part because it was formed by lava erupting from the middle of the continent, not a juncture where two plates meet; moon volcanos were likely formed in a similar fashion, since the moon is covered, basically, by a single giant plate.

Volcanologists like Sehlke usually play supporting roles in space exploration. They test equipment and speculate about how, say, Craters of the Moon's lava tubes are like those under the surface of the actual moon and might make for a good base of operations. "Imagine looking at the surface of the moon [from Earth] when you're planning a mission and saying, ‘Hmm, looks alright,'" Sehlke says. "But there are questions we need to answer before we go—maybe the terrain is treacherous."

They may also offer guidance from mission control to astronauts (often about areas that look like they might be interesting to explore), and analyze data from probes—like the first images of an ice volcano erupting on Saturn's moon Enceladus, captured by the Cassini spacecraft in 2005.

5. SOME OF THEM ARE LOOKING FOR THE BEGINNINGS OF LIFE.

Sulfide chimneys at the Urashima vent site in the Pacific
NOAA Ocean Exploration & Research, Flickr // CC BY-SA 2.0

Hydrothermal vents—openings in the seafloor where water enters, becomes heated, then spurts back out—support a lot of weird microbes that Wilcock says may be similar to the first organisms that ever existed on our planet. Studying them and the conditions that created them may help us understand how to look for life on other planets and moons—one of NASA's primary objectives. But Sehlke and others are also looking for life by scanning data from probes exploring our solar system: "Wherever volcanoes sit, on Enceladus or elsewhere, there is heat or fluids that maybe provide the necessary environment for microorganisms like the ones we know on Earth," Sehlke says. Volcanoes like these "give us the highest chance of finding life" out in space.

6. THEY ALSO WANT TO UNDERSTAND HOW TO SUSTAIN THE LIFE WE ALREADY HAVE.

While volcanoes created Earth's original atmosphere by emitting the carbon dioxide and nitrogen necessary for life, other volcanic gasses, like sulfur dioxide, increase the ability of our current atmosphere to retain heat [PDF]. "Learning how these things balance out is hugely important to understanding our future" on the planet, Soldati says. That's why new studies are looking at the links between volcanic activity and climate change, and how they may exacerbate each other.

Some volcanologists are particularly concerned about Iceland, where melting ice caps may be releasing pressure on magma chambers, contributing to more—and more explosive—volcanic eruptions in the future. The effect of the reduced pressure is similar to how “the cork of a champagne bottle flies into the air when it has loosened sufficiently,” geophysicist Magnus Guðmundsson told Hakai magazine. Another new study urged those making models of our climate future to include volcanic eruptions as a variable, which they find are under-sampled in such models but can have big effects on temperatures, sea levels, global radiation, and ocean circulation, among other key elements of the climate.

7. THEY GET TO USE A LOT OF COOL EQUIPMENT ...

A volcanologist examines seismic charts
Ulet Ifansasti, Getty Images

Volcanologists use a lot of very high-tech equipment in their line of work. Seismometers measure earthquakes on volcanic slopes. Infrared cameras measure the heat of lava flows. Correlation spectrometers measure the amount of sulfur dioxide in the air, which is released when magma is rising to the surface (and so can signal when a volcano might be ready to erupt). Tiltmeters measure, literally, the tilt of the land around a volcano. If instruments like these, having been mounted on a volcano, fall apart during an eruption, "we sometimes use helicopter drops to put new equipment on the ground," Lowenstern says. More and more, though, volcanologists monitoring land volcanoes rely on equipment mounted on aerial or space-based unmanned craft, "so we don't put people in harm's way." This includes technology called InSAR (Interferometric Synthetic Aperture Radar), which, from a satellite in space, can measure a volcano stretching and contracting. That helps scientists keep tabs on just what the magma inside a volcano is doing—and whether it's about to come up.

8. ... BUT ONE OF A VOLCANOLOGIST'S MOST IMPORTANT TOOLS IS A ROCK HAMMER.

Out in the field, Soldati says, her most important tools are her notebook, for jotting observations, and her steel rock hammer, which she uses both to chip away at rock and to gather samples of molten lava. To grab a sample, she swings into the lava with the pointed end of the hammer, then drops the molten material—which is around 2000°F—into a pail of water; quickly cooling the lava in this way turns it to glass (slow cool it, and it becomes rock), which she transports back to the lab.

Once there, Soldati relies on machines like a concentric cylinder viscometer, which melts lava samples so she can measure their viscosity—which tells her how explosive a volcano's eruptions are. Less viscous lava trickles out of a volcano, while more viscous, and hence more explosive, lava can blow out the whole side of a mountain, sending burning lava, rocks, and other debris flying.

9. IT DOESN'T LOOK LIKE THE MOVIES.

Volcanologist suit

One thing field volcanologists almost never use: those clichéd silver flame-proof proximity suits. "They're heavy, and since you usually have to walk hours to get to your field site, no one wants to carry all that weight," Soldati says. Besides, "heat is almost never the hazard that matters in the situations in which we work," writes Aaron Curtis, a volcanologist working at NASA's Jet Propulsion Laboratory. (You have a greater chance of "being hit by ballistics, or getting gassed," he notes.) "The reason you see those suits so often is that they look really cool on TV."

So what do they wear? Jessica Ball, a Postdoctoral Fellow at the U.S. Geological Survey, writes that "sturdy boots, hard hats, work gloves, rip-resistant clothing with long sleeves, and sunglasses or safety goggles are pretty standard, and I will add a gas mask if I’m going to be in an area with lots of fumes. Also, sunscreen is always important, because I’m often out in the sun all day."

10. SOME OF THEIR WORK IS DANGEROUS IN UNEXPECTED WAYS.

Lava and flying debris aren’t the only hazards during fieldwork. Tina Neal, a volcanologist with the USGS, has reported that she’s had several encounters with bears while working at Ukinrek Maars in Alaska. She also says, "I think the aircraft work of volcanologists is as dangerous if not more so than the active volcanoes we visit and study." Geologist Christina Heliker has described the most fearful moments during her time on staff at the Hawaiian Volcano Observatory as being those that involved flying in a helicopter over continuously active Pu`u `O`o. Once, while trying to return to camp after mapping lava flows, “It was almost dark, and we were sandwiched between an incandescent field of `a`a [lava] and this thick layer of clouds that were glowing orange from the reflected light of the lava,” she told an interviewer. “I was plenty relieved when the pilot decided to give it up and fly out to somewhere else.”

11. THEY WANT YOU TO KNOW: VOLCANOES AREN'T ALL BAD.

Volcanologists aren't drawn to their work only because of the destructive power of their research subjects. "[Volcanoes] also have a positive impact on our life," Soldati says. She points out that volcanoes fertilize the soil—some of the most productive crops on our planet are grown in mineral-rich volcanic ash. They also create new land; the Hawaiian volcano Kilauea has added 500 acres to the Big Island since 1983. So don't say volcanoes never give back.

13 Behind-the-Scenes Secrets of Dog Show Handlers

Dog handler Kellie Fitzgerald poses with her English Springer Spaniel 'James' after winning Best in Show at the Westminster Kennel Club's Dog Show in 2007
Dog handler Kellie Fitzgerald poses with her English Springer Spaniel 'James' after winning Best in Show at the Westminster Kennel Club's Dog Show in 2007
TIMOTHY A. CLARY/AFP/Getty Images

Every year, roughly 3000 dogs from around the country flock to Madison Square Garden to strut their stuff at the Westminster Kennel Club Dog Show. In all, some 190 breeds can enter the ring, each competing to look and act exactly as required for their breed’s ideal standard. But it takes a lot of hard work from dedicated handlers to produce a dog that can compete with the best of them. “What you see at Westminster, that’s the very final touch,” says Karen Mammano, who handles dogs with her husband Sam. “That’s the final product of everything we do.” We talked to a few handlers who have been at Westminster about what goes into training a dog with a shot at Best In Show.

1. The dogs have treadmills.

Among the qualities the judges take into consideration is the dog’s trotting pace. Many handlers put their pups on doggy treadmills set at a certain speed to get them used to keeping a particular trot. “It teaches them foot timing and the right kind of gait we want them to have,” Mammano says.

Some doggy treadmills cost more than $1000. But, according to dog handler Sharon Rives, that’s just part of these athletes’ training routine. “They’re developing their muscles just like any athlete,” she says, “any runner or football player or any athlete that has to train muscles to do something over and over again.”

2. Soup cans might be a dog handler’s best friend.

Judges also look closely at a dog’s stance—how it holds itself while standing still. “It’s kind of their supermodel stance,” says Rives. Every breed has an ideal stance, but teaching a dog to maintain that position while a judge pokes and prods often takes some creative training techniques. According to Rives, when her parents trained dogs in the 1980s, they used to have the dogs stand on four soup cans placed the correct distance apart.

“Everybody has their own way of doing it,” she says. “Now I have what we call stacking blocks, sort of a wooden device with four feet on it for the dogs to stand on and it’s adjustable. I start when they’re puppies with that and they stand on it for a couple minutes and as they get older they spend more time on it, maybe 15 or 20 minutes a day, to help train their muscles and body to remember to stand in that correct position.”

3. The dogs have ridiculously long names.

'Flynn' the Bichon Frise, with handler Bill McFadden, poses after winning 'Best in Show' at the Westminster Kennel Club 142nd Annual Dog Show in 2018
'Flynn' the Bichon Frise, with handler Bill McFadden, poses after winning 'Best in Show' at the Westminster Kennel Club 142nd Annual Dog Show in 2018
TIMOTHY A. CLARY/AFP/Getty Images

Professional pups have very fancy monikers that reflect their pedigree. For example, Rives’s Australian Shepherd answers to “Wiggle” but her full name is “Veritas Sexy and I Know It.” “Typically the prefix of the name is the kennel the dog is from,” she explains. “Veritas is my kennel name, so whenever I breed a dog, every dog has the word veritas in their name.” As for the rest of Wiggle’s full name, Rives says the litter theme was Top 40 Songs, so every puppy had a different song title in its name.

4. Handler cars must be inspected.

According to Mammano, the American Kennel Club inspects handlers’ vehicles before they can be listed as a "registered handler." What are they looking for? A car that could keep a dog alive in the most dire of conditions. “We have a generator, air conditioning, heat, a 30-gallon water tank,” she says. “We have to have fire extinguishers that haven’t expired and a heat monitor in the vehicle so if the air conditioning goes out the monitor knows. We’re pretty much self-contained.”

5. Dog shows aren’t natural.

Handlers are the first to admit that dogs weren’t made to trot around a ring. “Golden retrievers were never meant to run in circles in a show ring,” Mammano says. “They were meant to be out hunting and doing that job and other breeds were meant to be out pulling sleds. So I try and make it as fun for them as possible.”

6. There’s one quick way to get disqualified.

“If a dog bites a judge or a handler or another dog, that’s pretty much it for the rest of its career,” Rives says. “Aggression is not ever acceptable.”

7. You’re not a real handler until …

... you trip and fall in the ring. “I think we’ve all had a moment where we’ve fallen,” Rives says. “That’s always embarrassing. But I think I like to say that’s sort of like the dog show hazing. You haven’t been fully initiated into dog showing until you’ve completely wiped out in the ring.”

She also shares a hilarious story of one of her earliest shows, when she was just 16 years old. “Normally I use hot dogs or string cheese as bait, something I could put in my mouth, and I happened to only have liver that day, which I’m not gonna put in my mouth. I was wearing a suit that didn’t have pockets, but I had panty hose on so I thought I’ll just real slyly stick this in the waistband of my pantyhose under the flap of my jacket and when I need some bait I’ll just break off a little piece. Well, the liver made its way down the waistband of panty hose to my ankle and dog starts licking it. The judge is going, ‘Ma’am, the dog is licking your leg.’ I was just mortified.”

8. Handlers’ wardrobe choices are strategic.

When deciding what to wear for the big day, handlers have to make sure they’re not overshadowing the dog with fancy flair. “You want to dress to compliment the dog’s colors,” Rives says. “If you’re showing a black dog you don’t want to wear a black skirt because then you’re obscuring the dog.”

The more prestigious the show, the better the handlers dress. “We always joke that last week was fashion week for us because we were all trying to get suits for Westminster,” says Mammano.

And for the bigger shows, they invest in nice footwear, not only because they’re on their feet all day, but because their feet and ankles are going to be on TV. Rives is wearing the shoes she wore to her wedding. “They’re little silver ballet flats that have sparkly crystals on the toes,” she says.

9. It’s hard on the body.

Co-owner and handler David Fitzpatrick holds Pekingese Malachy after winning Best in Show at the Westminster Kennel Club Dog Show in 2012
Co-owner and handler David Fitzpatrick holds Pekingese Malachy after winning Best in Show at the Westminster Kennel Club Dog Show in 2012
Michael Nagle/Getty Images

“A lot of my peers have had their knees and hips replaced,” says David Fitzpatrick, a professional handler who works with the Pekingese breed. “You get tired just from being at the show.” And because dogs are always making left-hand turns in the ring, the handler’s left leg tends to take a beating.

10. They have lucky leashes, toys, and rubber bands.

Dog show people are quite superstitious. Fitzpatrick, for example, has a lucky leash. “I have one I’ve been using probably since 2004 because I know many dogs have had great success with it.”

Mammano won’t re-use a leash once it’s been used on a winning dog, opting instead to retire it. And she always wears three rubber bands around her arm to hold her number.

Also, Fitzpatrick says some owners carry around special toys for dogs, similar to the “busy bee” in Best In Show. “Most of these dogs do have a favorite thing and when you go into the ring and you can’t find that toy you do kinda go crazy like ‘Where is the busy bee?!’”

11. The dogs eat whatever they want.

Well, in the ring at least. “I had one dog way back in the early 2000s and all he wanted was filet mignon,” says Fitzpatrick. “He wouldn’t take chicken or liver, but the filet he would eat. So they get whatever they like. Or I had a Pomeranian that only liked potato chips. I had another dog who liked apples.”

12. Chalk and dryer sheets keep the dogs looking sharp.

Show dogs are some of the most pampered, well-groomed dogs in the world, but it takes a lot of work. “Every breed is going to have their own quirky thing they do to make the coat look a certain way,” Rives says. “One handler told me you should put dryer sheets on a wavy coat. Others say you should wash your dog’s coat in Dawn dish soap if you want it to be straight.”

Chalk is often used to make a dog’s coat look whiter, Fitzpatrick says. “Whatever it is to make the dog look better for the show, there’s probably a product out there for it.”

But according to Rives, grooming is a taboo topic among handlers because “people don’t want to share their secrets, and because there are things that are not allowed.” Indeed, too much grooming is considered cheating, so owners keep their tips and tricks to themselves. And if a handler sees another handler crossing the line, they’ll snitch. “It’s a self-regulating sport,” Rives says. “If you see somebody doing something they shouldn’t be, you’d report it.”

13. Best in show doesn’t come with a cash prize.

“You don’t win any money,” says Fitzpatrick, who won Best in Show at Westminster in 2012 with his Pekingese Malachy. “You get trophies and a lot of swag. We came home with bags of loot, but not one penny. It’s not about the money. It’s about competing at this historic event.”

This list first ran in 2016.

8 Secrets of Air Traffic Controllers

iStock
iStock

As the United States enters into the second month of a government shutdown that began on December 22, 2018, federal employee shortages are becoming an increasing problem. On the morning of January 25, 2019, the FAA announced that due to air traffic control staffing shortages along the east coast, they were halting flights into New York City's LaGuardia Airport. It's a potent reminder that while pilots and flight attendants are key to making air travel safe, air traffic controllers—though less-visible—are just as essential in getting you from Point A to Point B.

The Federal Aviation Administration (FAA) employs more than 14,000 of them to choreograph the flow of airplanes on the ground and in the sky, whether that means using radar and other tools to direct aircraft at take off, communicating with pilots about flight paths and weather, or helping pilots land their planes safely. Take a look at these secrets of air traffic controllers to learn about their unique lingo, high degree of job stress, and occasional UFO sighting.

1. Many of them don't work at airports.

When you imagine an air traffic controller, you probably envision someone working in a tall glass tower at an airport. However, many controllers toil at either a Terminal Radar Approach Control (TRACON) facility or at a route center, which may be located far away from an airport.

According to air traffic controller Chris Solomon, who controls planes for the military, controllers in each of the three types of facilities have different responsibilities. “The typical tower controllers get the planes from the gate to the runway and then airborne to within five or so miles of an airport. The aircraft then becomes under the control of the approach controllers [TRACON],” he told the website Art of Manliness.

These TRACON controllers usually control the plane during its ascent and descent from the airport. When aircraft reach an altitude above 18,000 feet, the route center controller takes over, using radar to guide aircraft at cruising altitudes until the plane begins its descent. Then the approach controller takes the reins, followed by a tower controller who guides the plane’s landing.

2. Age is a major factor.

Some air traffic controllers begin their careers in the military, while others apply to the FAA’s Air Traffic Control Academy. But no matter how they enter the profession, they must have good vision, a sharp mind, and the ability to think quickly and clearly under pressure. The FAA requires that applicants be 30 years old or younger when they apply to the job, and controllers must retire at age 56, before most of them experience any age-related mental decline.

3. They have their own lingo.

Inside an air traffic control room

Pilots and air traffic controllers around the world must speak English to communicate (it's required by the International Civil Aviation Organization), but they also have their own flight-related language. This phonetic alphabetic and numerical system, which replaces letters (A to Z) and numbers (zero to nine) with code words, minimizes confusion and misunderstandings between air traffic controllers and pilots.

For example, controllers say “bravo” instead of the letter “B,” “Charlie” instead of the letter “C,” and “niner” instead of the number “nine.” (Theories explaining the origin of the code word “niner” differ, but aircraft enthusiasts speculate that the extra syllable differentiates it from the German word for “no” or distinguishes it from the pronunciation of the number “five.”) Air traffic controllers also have their own slang and, for instance, use the phrase “souls on board” to refer to the number of people on a plane.

The phonetic system is spelled out in detail in the FAA Order 7110.65 manual [PDF], along with other key code words, phrases, and procedures. Controllers call the manual their "bible," study it during training, and review it regularly to keep apprised of any updates and additions.

4. Pilots with heavy accents can frustrate them.

Although English is the official language of aviation, not all pilots speak it well. Air traffic controller Brandon Miller, who works for Potomac Terminal Radar Approach Control (TRACON) in northern Virginia, tells Mental Floss that it can be difficult to communicate with foreign pilots. “However, we are in the business of communication,” he says, explaining that learning to solve potential communication issues is part of their training. When talking to a pilot who has a heavy accent, controllers may speak more slowly, enunciate words more dramatically, and try to avoid changing routes as much as possible.

Stephen, an air traffic controller with the FAA, echoes Miller’s point. “We mainly just bitch amongst ourselves, say things very slowly, and do the best we can” when dealing with pilots who have heavy accents, he wrote on Reddit.

5. They alternate between stress and boredom.

An airplane and an air control tower

Because they’re responsible for thousands of lives 24 hours a day, 365 days a year, most air traffic controllers experience a high level of job-related stress. “We often miss birthdays, we work on holidays and weekends, and often operate on alternative sleep cycles,” Miller explains. Staying focused is essential, especially during times of busy traffic and bad weather, so most air traffic controllers take a break every hour or two, depending on the rules at their facility.

According to Miller, the diversity of tasks in his work day keeps his job challenging. At any given time, he may be directing Air Force One or other VIPs (from our country or a foreign one), sequencing commercial passenger jets into a variety of airports in the Washington, D.C. area, assisting police or paramedic helicopters, expediting military fighters and military transport planes, or looking for suspicious aircraft in the Washington, D.C. Special Flight Rules Area.

On the other hand, graveyard shifts and periods with less traffic can be tedious and dull. “Hours and hours of boredom combined with moments of sheer terror, as we like to say,” Stephen told Reddit. “But if you like the challenge and want to be where the action is, it's a great job!”

6. They're probably overworked.

In a 2011 article for The Daily Beast, Bob Richards, who worked as an air traffic controller at Chicago O’Hare International Airport for more than two decades, described his job as “thrilling, fulfilling, and utterly exhausting.” Richards noted that four of his coworkers died of sudden cardiac death, two died of pancreatic cancer, and many others suffered from stress-related gastrointestinal illnesses. In his early 40s, Richards himself suffered from atrial fibrillation, which eventually progressed into congestive heart failure.

A secret study conducted by NASA in 2011 found that almost one-fifth of controllers made significant errors, partly due to chronic fatigue caused by their lack of sleep and busy shift schedules. To combat fatigue and address controllers who were allegedly asleep on the job, the FAA issued a series of new rules that increase the mandatory time between controllers’ shifts.

7. UFO sightings definitely happen.

A screen showing radar

During the course of their careers, most air traffic controllers have personally spotted (or have a coworker who has spotted) some sort of unidentified flying object. UFO sightings are more common at night, when air traffic controllers may see an unexplained blinking light that doesn’t appear to be coming from an aircraft. But strange sightings aren't necessarily alien life forms—radar is so sensitive that it may pick up items such as clouds, a flock of birds, or even a large truck on the ground.

8. RObots won't be replacing them.

Commercial aircraft landing

Although air traffic controllers rely on radar and other technology to do their jobs, they’re not in danger of technology replacing them any time soon. With so many lives at stake, air traffic control will likely always require humans to ensure that automated systems function properly and technology doesn’t malfunction. And controllers enjoy the sense of satisfaction that comes with using their knowledge and skills to help passengers get from point A to point B safely. “There is a great amount of pride that my coworkers and I take knowing that safety of air traffic control is the last thing on passengers' minds when they get buckled in the airplane,” Miller says.

An earlier version of this story ran in 2017.

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