13 Behind-the-Scenes Secrets of Park Rangers

Getty Images
Getty Images

The National Park Service is over 100 years old, and while we could wax poetic for days about the splendor of the parks themselves, we decided instead to find out more about the people who help preserve them on a daily basis—not to mention keep us from getting lost. Here are a few insights about what life is like as a park ranger for the NPS and other agencies, from their biggest perils to some of their most special moments.

1. THEY DO (A LOT) MORE THAN ANSWER YOUR QUESTIONS. 

The job of a ranger is more multifaceted than it may seem. “As seasonal employees we essentially have to get a year of work done in three months or so,” said Alex Miller, a Lead Park Ranger for the US Forest Service at the National Grasslands Visitor Center in South Dakota. Ranger duties may include giving tours, staffing the visitor center, collecting fees, fielding questions, patrolling the park, enforcing park regulations, doing demonstrations, coordinating education programs, tidying up park areas, conducting interviews for oral history projects, running outreach programs, serving as a first responder, fighting wildfires, and even manning social media accounts (phew).

Steve Gifford, who has worked as a ranger at the Lincoln Home National Historic Site in Springfield, Illinois, as well as other NPS sites, told us: “People think that it is an easy job, that all you do is answer some questions and offer a few tours. But it is much more than that; you do the general things people see, but also the behind-the-scenes work is varied and intense.”

Despite all that hard work, many rangers told us that the hands-on, unpredictable nature of the job was all part of its appeal. The life of a ranger never looks the same from one day to the next—in part because the tasks are so varied, and in part because the rangers never know what sort of things might come their way. 

2. THEY'RE NOT NECESSARILY NATURE PEOPLE.

An NPS uniform doesn’t automatically mean your park ranger is a wildlife expert or skilled mountaineer. After all, not all locations under the National Park Service are nature preserves. There are also historic sites, national monuments, battlefields, and other conservation sites [PDF]—which could mean your ranger is more of a history buff.

Perhaps surprisingly, not all rangers are technically "rangers" either. There are also Park Guides, who are typically on a lower tier within the specialization of interpretation and education and have less potential for promotion. Still, even these guides sometimes go by "ranger" informally or wear a badge that reads "National Park Ranger." Other ranger specializations include law enforcement, emergency response, maintenance, administration, and more. Additionally, while every agency is different, there are distinctions that come with rank—like District Ranger and Supervisory Park Ranger.

3. THERE’S SOME SECRET LINGO.

Since the NPS is a government organization, acronyms are everywhere. Miller told mental_floss: “We do the GARS and GOHP projects as the USFS under the USDA in partnership with the BHPFA, VBJ and NPS, but for UNL have to be CITI certified with IRBs. All perfectly clear, right?” 

Aside from the ubiquitous acronyms, other slang terms includes "clustering," which occurs when there are too many rangers and/or volunteers at the front desk at one time, and which can give the impression that the park service employees have nothing to do. A "Furniture Tour" is when a ranger does a historic house tour but talks about the furniture or architecture of the house without talking about the people who lived there. While those tours are sometimes intentional, they’re also sometimes a byproduct of visitors who steer a tour through their persistent questions (you know the type).

Yellowstone in particular has its own set of lingo, where the rangers and other seasonal employees refer to themselves as “Savages," the exact origin of which is unknown. Then there's a "Code W" tourist—a wimpy hiker who requests emergency help when they don't really need it.

4. IT CAN BE A SCARY GIG ...

Rangers are incredibly well-prepared, skilled, and knowledgeable—both in their background and the education they receive on the job—but you can’t prepare for everything. The parks employees we talked to mentioned everything from bison to rattlesnakes to mountain lions, though nearly all of them also talked about how easy it was to avoid getting into trouble with wildlife if you take the right precautions. Basic rules, like not getting too close or moving too quickly, will generally keep you out of harm's way: "They give plenty of indicators when their territory is being encroached," Miller told us. It's also a good idea to properly stow your food items and trash, as those will attract all kinds of creatures. 

The elements can become an issue too; severe storms, tornados, and other surprise weather events all come into play from time to time. As does the paranormal, in some cases. Nick Sacco, a ranger at Ulysses S. Grant National Historic Site in St. Louis, Missouri, joked, “Some visitors talk about seeing ghosts in the basement of White Haven [another name for the Ulysses S. Grant National Historic Site] but I haven't seen any yet!”

5. … BUT THERE’S PLENTY OF ADORABLE TOO.

Yellowstone National Park via Wikimedia Commons // Public Domain

The laws of nature state: Where there are big scary animals, there are little, enchanting ones too. You’ll probably be happy to know that multiple rangers mentioned cuddly creatures; perhaps surprisingly, porcupines got a few shout-outs (not necessarily first critter that comes to mind when conjuring “cute”), in addition to other furry, park-dwelling friends who’ve crossed paths with rangers and visitors over the years. It's just one of the perks of the job.

6. MOST OF THEIR EXPERIENCES WITH PEOPLE ARE GREAT.

When we set out to discover what the life of a park ranger was like, we expected to hear a lot of horror stories about ridiculous tourists. While those do exist, the rangers we spoke with were overwhelmingly positive about visitors. They love talking to people, and not just about the parks. They like finding out what brings people out and what experiences they’ve had, which sometimes even leads to lasting connections. Sacco recounted this story:

I'll never forget this family of three that visited the site—a grandfather, a father, and a boy with autism. It was just the three of them during the tour and I tried to give them a personalized experience showing them around the house. The grandfather bought three pocket watches from our gift shop, but he came back another month later and showed me a plaque he had bought with one of the watches glued on top and a personalized engraving stating the date in which they had visited the park. He told me that the boy absolutely loved the site and couldn't stop talking about it for days with his family, friends, and classmates, and that the experience had brought the three of them together. That was really special to hear.

Rangers also told us that visitors are generally pretty well-prepared on a practical level—camping etiquette is on-point!—and said that occasionally visitors will even have teach park employees things about the great outdoors.

7. BUT PEOPLE STILL DO STUPID THINGS SOMETIMES.

From dangerous selfies to not reading signs to starting fires when they shouldn’t (there’s a reason Smokey Bear is still around), park visitors do occasionally do things that put themselves and the land in danger. Other common issues include people who want to argue about historical facts or who want to interact with places or things that are off-limits. Rangers also told us that they’re commonly mistaken for law enforcement—so let this be a reminder that not all uniforms are created equal.

8. IT TAKES A LOT OF WORK TO BECOME A RANGER.

Anyone who dreams of being a park ranger should know it doesn’t just happen overnight. But the good news is, there are a lot of roads that lead there, most of which involve a relevant degree and volunteer work (usually a lot of volunteer work). 

One of the rangers we spoke to volunteered through a Forest Service program called Passport in Time before becoming a ranger, while another went through a program now known as Pathways, which allows undergraduate and graduate students to work for the NPS while also working on their degrees. Sacco got his start at the park as an undergrad through an internship with a predecessor to Pathways called the STEP program. “The plan all along had been for me to become a high school social studies teacher," he says, "but when I started working at the Park Service it was real revelation for me. Learning about and teaching history became something that went far beyond the confines of the classroom and history textbook, and I loved how people of all ages relished the chance to interact with NPS staff and see historical homes and artifacts in person,” he told us. 

9. THE FIELD IS HIGHLY COMPETITIVE.

Even those who put in the hard work to become a ranger might not get a job or get placed where they want to be. According to Gifford, “There is so much competition for every single position within the agency. One of my coworkers applied to 90 different jobs before getting on with us.”

As far as compensation goes, it varies quite a bit based on the location and scope of the park, the position itself, and the employee's education history. Most NPS jobs—like other government jobs—have their pay based on the General Schedule pay scale [PDF]. But while most on the GS pay scale are full-time workers, many parks employees are seasonal, meaning they have to find work in other areas during the off-season. For a few specific examples of jobs (and their pay brackets) check out the USAJOBS site; some positions are hourly while others are salaried.

10. A PARK RANGER DOESN’T NECESSARILY WORK FOR THE NATIONAL PARK SERVICE.

Of course, not every park with a ranger falls under the umbrella of the NPS. There’s also the U.S. Forest Service, the Bureau of Land Management, the National Wildlife Refuge System, and other state agencies that employ the term “park ranger.” It might seem like a small distinction, but the agencies have different approaches and missions, which means their rangers can have different roles and responsibilities. For example, while national parks emphasize preservation and work under the Department of Interior, the US Forest Service is under the Department of Agriculture and is focused on both preservation and uses—such as lumber, cattle grazing, and mining.

11. THEY ADVOCATE R-E-S-P-E-C-T.

Since every park is so different, it’s tricky to come up with a hard-and-fast rule of behavior to encompass them all, but one thing a few rangers mentioned was plain old respect. If visitors all went in to the parks with a spirit of respect—for nature, wildlife, history, and other people—a lot of park problems, like trash and fires, could be avoided.

12. THEY WANT TO HELP YOU.

Another thing rangers strongly advised was planning ahead—and asking them for help when you arrive. Many parks offer varied experiences, from hikes to horseback riding, and knowing what you want to do ahead of time is useful for both you and parks officials, who are trying to serve the needs of a lot of people (over 10 million annually at the most popular location, Great Smoky Mountains National Park). Many of the parks have extensive online resources to help you plan your park experience.

The whole asking questions thing isn’t just about planning, though—rangers also want you to talk to them if you have concerns or need help. It’s what they’re there for, and many say that people don’t do it enough. 

13. THEY’RE NOT ALLOWED TO SPILL ALL THEIR SECRETS.

As active government employees, many rangers aren’t allowed to speak about the job—we talked to mostly former rangers, or current rangers who were given approval from above, and they couldn't share all the details of their work. (We should also note that the views expressed here are personal opinions that don't necessarily reflect the views of the National Park Service). Many rangers have great stories—there was some off-the-record talk of finding visitor underwear and other misadventures—but for the most part, the rangers had to be tight-lipped. Yet another good reason to take one out for a drink, and ask to be regaled with some anonymous tall tales.

Know of something you think we should cover? Email us at tips@mentalfloss.com.

All photos provided by iStock unless otherwise noted.

12 Secrets of Dollar Store Employees

A dollar store in Brooklyn
A dollar store in Brooklyn
Spencer Platt/Getty Images

Discount retailers have probably been around as long as commerce itself, but it wasn't until the 1950s that a string of stores began popping up in the South that shared a common element: Everything they sold was dirt-cheap. In recent years, the country has experienced a wave of frugal storefronts selling everything from stationary to seafood. Stores like Dollar Tree, Family Dollar, Dollar General, and a rash of independently owned stores catering to the budget-conscious now outnumber Starbucks and McDonald's in the U.S.

To get a better sense of the activity that surrounds these wallet-friendly outlets, Mental Floss spoke to three employees of Dollar Tree. Here’s what they had to say about stocking their shelves, fanatical customers, and why they spend so much time filling up balloons.

1. Paper goods are the best deal in stores.

You can find practically anything at dollar stores, including frozen food (more on that in a moment), toys, and cleaning products. Assortments can vary widely by store and by franchise, but according to Brenda, the store manager of a Dollar Tree in the Midwest, customers get the best deal sticking with paper products. At least, that's what employees buy most frequently. “The items that my employees and I purchase at Dollar Tree for value would definitely be toilet paper, paper towels, birthday cards, candy, balloons, plastic ware, paper plates, envelopes, stationary products, and the daily newspaper,” she says. At her store, toilet paper and the local newspaper are the top sellers. While the former is a pretty obvious necessity, newspapers at her location are typically cheaper than in other stores; the Sunday edition in particular is up to two or three dollars cheaper. (Like a lot of their inventory, the chain likely gets a tremendous discount for buying the papers in bulk.)

2. They know you won't be in the store for too long.

The exterior of a Dollar Tree store is shown from a low angle
Joe Raedle, Getty Images

Dollar stores typically have little signage, few frills, and a small real estate footprint (Dollar General's is around 7300 square feet, or one-tenth the size of a Walmart). But having limited space with easily accessible items is by design—the average shopping trip for a Dollar General store is just 10 minutes. “Planning the store around fast trips is one good way to improve the fast experience many customers are looking for, while also keeping sales high by allowing customers to see many products,” says Hank, an assistant Dollar Tree store manager in Canada. Customers “tend to want to get in and out fast. They are often busy and have other plans for the day and don't want to spend too much time wandering the store.”

3. They want customers to feel like they’re on a treasure hunt.

According to Moody’s, an earnings and credit analysis firm, Dollar General rotates its inventory on a regular basis to make customers feel like they need to buy items now in case they’re not around later—perpetuating what it calls a "treasure hunt" feel. That helps the stores compete with online retailers like Amazon, which typically maintains stock of popular products and may not provoke the same sense of urgency in buyers.

Dollar Tree’s approach is slightly different. While new inventory does arrive from suppliers, it’s not as frequently. “When we are doing the truck we get really excited when we see a new product,” Brenda says. “We only see maybe 10 to 15 new things per week out of 1500 items that are coming off of the truck, so when we get something new we immediately cut open the box and examine it.”

4. They catch a lot of shoplifters.

You can walk out of dollar stores with an armful of goods for $20, $10, or less, but that still doesn’t deter people from swiping even the cheapest targets. “The shoplifting is ridiculously rampant,” Brenda says. “We catch someone just about every day.”

Oddly enough, the price may help facilitate the theft. “The thing with the low prices is that there is no real deterrent from people stealing since none of the products have any security around them," Brenda says.

5. They recommend you skip the steak.

A steak sits on a grill
A steak purchased somewhere other than a dollar store.
iStock.com/NightAndDayImages

Shopping for frozen foods at the discount chains can be hit or miss. Some items might be OK: “I’ve had the little pie slices, the sausage and pancake bites, and the Cinnabon bites are amazing,” Brenda says. “The frozen dinners are good as well. People also love the frozen vegetables and fruit.”

But when it comes to unprocessed food, like meat or seafood, you should probably consider a visit to the local grocer instead. “I don’t eat any of the frozen fish or rib eyes because I don’t trust frozen seafood or meat that costs a dollar,” she says.

Nate, a Dollar Tree manager in Minnesota, agrees. “I would never buy the steak,” he says. “I’ve heard from more than one person that it doesn’t cook [well] and it feels like rubber.” In 2016, television affiliate WCPO in Cincinnati attempted a taste test, serving up the four-ounce $1 ribeye along with a butcher's and supermarket cut to some area firefighters. Among the responses: "I guess it was meat" and "It's not terrible."

6. Other stores use them to stock up.

When most everything is a dollar, it’s easy to see why discount chains find themselves acting as a warehouse for local small businesses. Hank says that he’s observed independent proprietors coming in to stock up on items. “There is one man who runs a convenience store and buys boxes of chocolate bars and bottles of soda,” he says. “We also get plenty of event organizers buying supplies in bulk, sometimes hundreds of items at a time.”

7. They dread the sight of Hot Wheels toy cars.

A Hot Wheels toy car is pictured
iStock.com/CTRPhotos

While many toys at dollar store locations are of suspect quality, there’s at least one bit of inventory that causes a lot of excitement in aisles. “We get a lot of the infamous 'Hot Wheels Hunters,'” Nate says, referring to collectors of the popular die-cast toy car line from Mattel. “I guess they scour the internet and find out when stores are getting shipments. I’ve had people show up a day after my 2000-piece truck [arrives] and demand I go find the one box of Hot Wheels I got so they can be the first to buy them.”

If they’re polite, Nate will try to accommodate them. Some of the nicer Hot Wheels fans even deputize themselves as de facto employees. “The one guy that is a frequent visitor will take the boxes I have and stock them neatly on the shelves while he looks for what he wants," Nate says.

8. They sell pregnancy tests. And they’re reliable.

A home pregnancy test shows a positive result
iStock.com/nazdravie

If you’re wary of the accuracy of a home pregnancy test kit that costs $1, well, you probably should be. But according to Nate, his store stocks a reliable brand. “The pregnancy tests we sell are the same ones used in most hospitals,” he says. Most all pregnancy tests detect a hormone called human chorionic gonadotropin, or hCG, which is produced during pregnancy. More expensive tests can detect lower levels earlier in a pregnancy, while cheaper tests—like the ones in dollar stores—might not register a positive until a woman is a little further along.

But they're still effective. And according to Brenda and Nate, they're also among the most-stolen items in their stores.

9. Balloons keep them aloft.

Most Dollar Tree and many other dollar store locations have a counter devoted to mylar balloons intended for birthday parties and other events. That’s because the low cost and easy storage of the un-inflated balloons makes them a very profitable endeavor. “Balloons do a ton of business for Dollar Tree,” Brenda says. “A ton. Especially for big events.”

In a given week, her store might sell 150 to 200 balloons: “If you think about it, every day is someone’s birthday, baby shower, graduation, or anniversary.”

10. They might warn you away from a bad deal.

Shoppers browse the aisles of a dollar store
Spencer Platt, Getty Images

If you’re on the fence about whether or not a dollar purchase is worthwhile, you can always ask an employee. They might tell you if it’s worth the cash. “I know that the quality of our products is not always the best and I obviously am not going to constantly bring this up to customers, but I am not afraid to give them a bit of heads up when I know a certain item is especially poor, or could be found much cheaper at a competitor,” Hank says. “I know that the company will survive without those couple sales, and I prefer to make customers happy over adding a few more dollars to the wallet of the company.”

11. The store manager is often overworked.

Dollar Tree, Dollar General, and other chains have come under fire in recent years for tasking store managers with a lot of responsibility in order to keep the costs of staffing low. According to Nate, that checks out. “In my district they are trial-running having the stores unload the semi-trucks instead of the drivers," he says. "But they won’t give us the hours to add an extra guy, which means I’m the manager on duty while being in the back of a semi throwing 1800 cases."

12. They can’t keep Donald Duck on the shelves.

Bottles of Donald Duck orange juice line a store shelf
Ted Eytan, Flickr // CC BY-SA 2.0

In stores filled with a lot of unfamiliar brands, customers like to see one recognizable face: Donald Duck’s. The Disney character is front and center on Dollar Tree’s orange juice, and his smiling bill is one of the most popular items in the stores. (The drink is produced by Citrus World, which owns the Florida’s Natural label and licenses the Donald imagery and name from Disney.) “The Donald Duck orange juice is our third most-sold item,” Brenda says. “To be honest, I’m not sure why it’s so popular. A lot of people stop at our store on the way to work or wherever, so it’s kind of a quick pick-up.”

11 Secrets of Hollywood Science Advisors

AMC
AMC

The work of a Hollywood science advisor can be hard to spot. Rather than shoving science in the audience’s faces, it’s their job to make the world of a movie or TV show feel believable, from the physics of fight scenes to the theories that characters scrawl on the blackboard.

Science advisors are usually regular scientists working in fields like physics, astronomy, and chemistry; the main thing that often sets them apart from their peers is a passion for film and TV. Whether they're meeting with actors, checking equations, or shaping plot points, here are some of the ways they contribute to your favorite pieces of pop culture.

1. Science advisors are usually volunteers.

Most of the Hollywood science advisors that Mental Floss spoke to were doing the work pro bono. Donna Nelson, a chemist at the University of Oklahoma, learned that Breaking Bad was looking for a science advisor while reading an interview with the show’s creator, Vince Gilligan. According to him, the series was in need of guidance from a real scientist, but there wasn’t enough room in the budget to hire one. So Nelson volunteered to lend her knowledge.

That was in Season 1, and over the next several years Breaking Bad exploded into a massive success. But even as the budget grew, Nelson never once accepted a paycheck for her advising work. “I was a volunteer from beginning to end,” she tells Mental Floss. “I was delighted to do it because my goal was to help the scientific community.”

The same usually holds true even when the advisors contributing their expertise to a high-budget Hollywood blockbuster. James Kakalios, a physicist at the University of Minnesota and science advisor on such films as Watchmen (2009) and The Amazing Spider-Man (2012), tells Mental Floss, “All the consulting that I've done has been volunteering.”

2. Geeking out gets them noticed.

Before she became advisor on the TV show 12 Monkeys, Sophia Gad-Nasr, an astroparticle physicist at UC Irvine, was just a regular viewer talking about the episodes on social media. "I really liked it and I tweeted about it, so the showrunner reached out to me and let me know they were in need of a science advisor," she says.

Meanwhile, Kakalios was a comic book fan who had literally written the book on the physics of superheroes before he was asked to work on the Watchmen movie. "[Warner Bros.] contacted me and said 'We're making a movie about a comic book. Have you ever heard of this graphic novel called Watchmen?' And if you're into comic books, it's like saying 'Have you ever heard of this movie called Citizen Kane'?" he says. "So when I was done vibrating like a gong, I said 'Yes, I've heard of Watchmen.'"

3. They're sworn to secrecy.

Sean Carroll, a theoretical physicist at the California Institute of Technology, did some consulting on the upcoming movie Avengers 4—the entire plot of which has been kept tightly under wraps. He says, “I know things about that I’m not allowed to tell anybody. And they do make sure that you understand that.”

For 12 Monkeys, Gad-Nasr was hired to help introduce the Hartle-Hawking state—physicists Stephen Hawking and James Hartle's theory that prior to the Big Bang there was only space and no time—into the show. Her work ended up being one of the biggest spoilers of the series. “[In 12 Monkeys] you keep getting hints about this 'red forest,' and that red forest was actually the Hartle-Hawking state I worked on. I had to sign an NDA.”

4. They need to be on-call 24/7.

Scientists who sign on to advise a TV show shouldn’t expect normal working hours. The makers of the show might reach out to them whenever a science question comes up during filming, which can be any time of day or night. While working on Breaking Bad, Nelson knew that being able to answer emails quickly was crucial. “I tried to put myself in [the filmmakers’] place and thought of them being on set, and you know they’re not going to hold up filming for a science advisor,” she says. “They’re very busy … so if they don’t get an answer it will be easy for them to write the science out.”

5. They sometimes meet directly with actors.

A science advisor mainly works with writers, producers, and directors, but occasionally they'll meet with members of the cast. While consulting on Watchmen, Kakalios chatted with actor Billy Crudup to help develop his character, Dr. Manhattan, who’s a nuclear physicist. "We were talking about [Dr. Manhattan's] attitudes of being cut-off from humanity and I was talking to him about how as a director of graduate studies I often saw students get overwhelmed by graduate school," he says. "They can kind of shut down but the one thing they focused on exclusively is their work—it's the one thing they have control over. Later on he said he thought that was helpful."

6. They help make fictional scientists feel human.

The makers of Breaking Bad often asked Nelson what a chemist might do in certain situations, from the words they use to the way they interact with their students and peers. One of her insights into the psychology of Walter White became a major plot point in the series. “They asked, ‘If there was a person who was working alongside another person and one man would go on to be a Nobel Prize winner and the other would go on to become a high school teacher, what is something that could happen to make them take different paths?’ And I said, ‘Is there a young woman involved? Have the successful one take the girlfriend away from the other one and that would devastate him.’ And that’s exactly what they did.”

7. If you want to spot a science advisor’s work, check the blackboard.

One of the most common tasks science advisors are given is something most viewers never notice. If a movie or TV show contains a scene with a professor (or scientist, mathematician, etc.) in front of a blackboard, it’s the science advisor's job to make sure that whatever equations are behind him or her make sense.

“I spent three days on the set of the TV show Bones because they had a long set of sequences with writing on blackboards,” Carroll says. The character writing on the chalkboard in that episode was also a theoretical physicist, and Carroll was responsible for making sure the work was accurate.

Gad-Nasr was also called to set to double-check the math she had come up with for 12 Monkeys. “It wasn’t me who wrote it on the blackboard, but I just came by to make sure everything was cool.”

A blackboard full of nonsense can also be a sign of a film or TV show that doesn’t have a science advisor. Before signing onto Breaking Bad, Nelson noticed some bogus equations on the board in Walter White’s classroom in early episodes. “There were parts that weren’t accurate and I would have stepped up and said something,” she says. But she was able to make up for it later on when the makers of the show asked her to draw some alkene structures to feature on a blackboard. “A person who’s not paying attention might not see that, but a student who’s just had alkene as an undergrad in class or as a high school student taking organic chemistry—they may feel great to be able to look at the correct structures and not see something different from what they learned in class.”

8. Their advice can lead to rewrites ...

Much of a science advisor’s work boils down to small changes in the dialogue, but occasionally their input leads to more significant cuts. When working on Thor (2011), Carroll advised against one scene that depicted a character pushing another off a disc-shaped planet. “The problem is there’s no gravitational pull to pull you off the edge of the planet,” he says. “So scientifically that doesn’t quite make sense.” (On a disc-shaped planet, gravity would actually be working to pull you back to the center.)

9. ... But they usually try to keep changes minimal.

A scientist and director may disagree over the intricacies of superhero physics, but at the end of the day, a science advisor trusts that the filmmaker knows what’s best for their movie. When looking over scripts, Nelson says she made it her mission to keep the dialogue as intact as possible. “The [writers] knew how to write a successful script and I didn’t, so the number one thing I did not do was rewrite the page. So if there’s an incorrect word that’s a three-syllable word that starts with P, I would try to correct the sentence by substituting a different three-syllable word that started with P, because they in their writing might have a certain cadence in the sentence or alliteration or something like that that other people might miss, and I would always try not to destroy any of that.”

10. Their suggestions don’t always make it in.

No matter how much a filmmaker appreciates a science advisor’s input, they rarely choose science over story. “Very few movies or TV shows in the science fiction world try to be 100 percent accurate,” Carroll says. "Really they’re trying to tell a good story more than anything else.”

Nelson experienced this first-hand when she was asked for her opinion on one of the most famous examples of inaccurate science in Breaking Bad: Walt’s blue meth. “Vince [Gilligan] came and asked me, ‘What do you think about making the meth blue?’” she recalls. “And I said I wouldn’t do it, because meth is not blue, it’s white. He said ‘Isn’t there any reason why it might be blue under some circumstances?’ I said no, it will always be white. And as you know, they went ahead and made it blue because it was necessary for them to have a trademark for his meth. It was a plot device.”

11. More filmmakers are using them.

When the makers of Breaking Bad first brought Nelson on as a science advisor in 2008, hiring her was a bit of an experiment. "When I first started working, I was told in so many words that there was a rumor in Hollywood that you couldn’t have a hit show with a science advisor," she says. Today, working with a scientist is standard even in movies and TV shows with minimal scientific themes. Part of the job's growing prevalence can be credited to the Science and Entertainment Exchange, a program that connects entertainment industry professionals to scientists.

Another explanation is that today's media consumers hold filmmakers to higher standards. "I think there’s an increasing sophistication among the audience and you can’t just have any old thing happen," Carroll says. "We live in a generation post Cosmos and Brief History of Time where there are a lot of moviegoers who are very smart about what is plausible, and they want their plots to make sense."

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