upworthy
Science

A scientist created a 'utopia' for mice and then they all started dying

The results are fascinating, but are they relevant to humanity?

mice, mouse, experiments, scientific research, overcrowding, overpopulation, universe 25
Canva Photos

How could Mouse Heaven go so terribly wrong?

In 1968 John Calhoun, a scientist and animal behavioralist, decided to create a "utopia" for mice. It would have unlimited food and water, with beautiful nesting spaces and plenty of materials for the mice to make cozy homes with. Sweet experiment! the mice were probably thinking. Much better than the Maybelline trials we're used to.

However, there was a catch, of course. There was one thing the utopia would be lacking, and that would be physical space. As the mouse population grew, overcrowding would become an issue, and Calhoun wanted to study the problems this would potentially cause. That sound you hear is the collective sigh of the disappointed mice who were stoked about the 24/7 all-you-can-eat buffet.

The experiment, dubbed Universe 25, began when Calhoun introduced four mouse "couples" into the utopian complex. A year or so later, it was overrun and the conditions had turned hellish, even though the mice had not run out of food or water.

mouse, mice, animals, science, research, studies"The conditions had turned WHAT?"Giphy

Initially, for just the eight original mice, the square box Calhoun built included 256 nesting boxes (or apartments) stacked on top of one another. Water bottles and food dispensers were located all along the nesting spots, and mice could travel throughout the complex at will via mesh tunnels. The starter mice were also screened for diseases and the population was obviously protected from predators. The climate was controlled and comfortable. Conditions were perfect.

The first mouse pups showed up a little over three months later, with the population of the colony doubling every 55 days. Nineteen months later, there were 2200 mice living inside the box. With such perfect surroundings, the infant mortality rate was practically zero, leading to the rapid rise in numbers.

mice, mouse experiments, scientific research, animal experiments, overpopulationJohn Calhoun poses with his rodents inside the mouse utopia.Yoichi R Okamoto, Public Domain


By month 19, this rodent utopia had become an overcrowded hellscape. Calhoun noticed three alarming trends, in particular.

In short, everything was devolving into chaos and the very society of the mice began to collapse at a rapid rate.

The "Beautiful Ones" and the "Dropouts": Mice have a complex social hierarchy ruled by dominant alpha males. Sam Kean of Science History Institute Museum & Library notes that, in the wild, non-dominant males (the ones who lose macho showdowns) can skip town and start over somewhere else. But in the close quarters of Calhoun's experiment, with nowhere to hide, they were forced to hang around and viciously battle with each other over scraps. Eventually, non-dominant male mice, which Calhoun called the "Beautiful Ones," withdrew from society completely and only ate, slept, and groomed themselves.

Though resources were unlimited, certain aggressive males hoarded them anyway: The alpha males ruled over everything in the once-utopian mouse society. They kept harems of females in the apartments to mate with and fought fiercely to defend their territory. But new waves of hungry young male mice kept coming and coming, and eventually even the most dominant alphas abandoned their posts. This led to more attacks on nursing females, which in turn led to more mothers kicking their pups out of the nest early.

Birth rate declined dramatically: With the non-dominant males giving up completely and focusing on #SelfCare, dominant males too exhausted from endless battles, and females sick and tired of it all (many became asexual hermits by the end), stopped mating and giving birth entirely. Once this happened, the society was doomed. Even with plenty of food still available, cannibalism was rampant.

Calhoun was not shy about drawing parallels between his research and humanity. "I shall largely speak of mice, but my thoughts are on man, on healing, on life and its evolution," he once wrote.


mice, mouse experiments, scientific studies, universe 25, sociology, overpopulationAlpha male mice, anyone? Photo by Kanashi on Unsplash

There are aspects of his wild experiment that certainly sound familiar.

We live in a world with plenty of resources for everyone, but a few select people hoard more than their fair share. When you think of the rodent "apartments," it's hard not to picture densely packed urban environments where people are stacked on top of each other at every turn. Maybe on some level some of us can relate to the “Beautiful Ones” and their urge to not participate in all the ugliness and just sequester and groom themselves. You can make an argument that when the mice stopped having to worry about food and shelter, it removed the element of challenge from their lives and left them lost–like many of us are lucky enough to not have to wonder where our next meal comes from, and maybe that has something to do with our never-ending search for meaning. Some even go so far as to link more people choosing to delay having children, or not have children at all, with the collapsing society of the mice.

But Calhoun's work has also been heavily scrutinized, with some claiming it's based on shaky science. And in the end, there’s the small matter that humans are not mice. We are infinitely more complicated, and so much better suited to adapting to our environments. Kean writes, "Ultimately Calhoun’s work functions like a Rorschach blot—people see what they want to see."

It's fascinating and thought-provoking nonetheless.

True


Life can be bleak, so we’re going to be celebrating the small joys while we can—whether that’s a sweet snack that boosts your mood (courtesy of our friends at All In), or a tweet so perfectly timed it restores your faith in the algorithm (even if only for a second). These momentary mood boosters are everywhere you look—you just have to be able to find them underneath all the noise. And that’s where we come in.

Consider this weekly web series your cheat sheet to the best of the Internet—not just random memes to make you laugh, but examples of people truly finding something extraordinary in the mundane. Each Friday we'll be delivering five pieces of media that allow you to stop for a second, take a breath, and feel just a little bit brighter among the daily stress. (Think of us as your chronically online bestie who knows exactly how to make you smile, exactly when you need it the most.)

Ready to smile? Here we go.

1. Babies (mis)pronouncing foods 

@gdun

safe to say he likes apples 🤷🏻‍♂️

♬ original sound - gdun

There are few things more precious than a baby learning how to pronounce words (usually incorrectly), and TikTok creator gdun knows it. In a viral, multi-part series, this creator has captured his toddler trying to pronounce the names of different foods, and it’s almost impossible not to smile while you’re watching these. Peas are “peeeth,” pizza is “more this!” and pancakes are simply a terrified “no.” We could listen to these all day.

2. This tiny, lip-syncing diva 

@backyardchickendiaries 🐓🪞✨ #backyardchickens #midwest #fypシ #minnesota #coop #bokbok #eggs #poultry #birds #mybabies #chickens #mealworms #peckingorder #herechickychicky #weekend #treats #bean #millie #girdy #violet #five #australarp #barredrock #cuckoomaran #orpington #lavender #egger #silverlacedwyandotte #trend #viral #blowthisup #chickencrazy #mybabies #cluckcluck #featheredfriends#blowthisup #iwasjustthinkingaboutit #viral #trend #chickencrazy #chickencommunity #homestead #futurefarmer #gardening #sourdough #chickens #polish #followme #views #silkie ♬ original sound - FEEL GOOD SONGS

TikTok is known for creators who lip-sync along to their favorite tunes, but the star of these videos blows them all away. Brace yourselves–he’s a rooster.

You heard that right. TikTok creator backyardchickendiaries has managed to create several videos of his rooster lip-syncing to songs extremely convincingly, the rooster’s actions perfectly coordinated with the inflection of each individual note. The transitions, the close-ups—it’s a verifiable masterpiece. The entire video deserves a watch (and a standing ovation) but skip to 0:57 for the best part.

3. This small (but brilliant) shift in perspective 

This week in Central Park, our friends at All In are asking people “What brought you out here in the park today?” One of the answers they captured has us totally rethinking our perspective on life.

When posed with the question, Jessica Harrison (@howdyjess on Instagram) answered that as she and her friend were sitting and people-watching, they noticed that no matter how interesting or strange or quirky anyone was acting in a given moment, they were ultimately doing “the right thing for them.” This is a fantastic way to view the world, if you ask us—reserving judgement and just assuming that everyone is trying their best. Harrison calls this “aggressive benefit of the doubt,” or ABOD, and says in the video she’s going to “take that reframe and apply it to other areas of my life.” And you know what? Same.

4. David Attenborough's biggest (smallest) fan

Max Evans-Browning and a homemade birthday present for his hero, David Attenborough

ichef.bbci.co.uk

If you’ve ever seen the famous Life documentary series, you’re already familiar with the great David Attenborough—an English biologist who’s worked more than seventy years (70!) creating films that celebrate the natural world. Attenborough has been making documentaries about animals and nature since the early 1950s, and since then he’s used his platform to educate the masses about climate change and other environmental issues, hoping to protect Earth and the species who call it home. Last month, Attenborough turned 99, and to celebrate, fellow nature lover Max Evans-Browning made him a birthday present—an eight-page mural that features 99 of Attenborough’s favorite animals.

Evans-Browning’s mother, Samantha, said in an interview with the BBC that Max not only loves animals, he’s been a fan of Attenborough and his work “from the moment he could talk,” watching his documentaries and even dressing up like him for World Book Day. Max “spent hours” researching Attenborough’s favorite animals and is now hoping his pictures will reach the man himself. No word on whether that’s happened yet, but either way, this has to be the best birthday present he’s ever received.

5. The sacabambaspis is trending again

i.kym-cdn.com

Speaking of animals: this handsome fella is making a reappearance on social media—and, yes, he’s real. Feast your eyes on the sacabambaspis, a jawless, prehistoric fish that looks like a Pokemon and lived more than 450 million years ago.

According to Know Your Meme, the sacabambaspis started becoming widely known in August 2022, when Twitter user Kat Turk posted a picture of a reconstructed model of the fish on display at the Natural History Museum in Helsinki, Finland. The animal’s bizarre appearance not only caused Turk’s tweet to go viral, it also spawned a huge interest among internet users in China and Japan, who immediately started turning the sacabambaspis into merchandise, including stickers, t-shirts, and more. It’s been a meme ever since.

We’re not exactly sure why the sacabambaspis is going viral now, in June 2025, but you know what? We’re here for it.

For even more “extra”-ordinary moments, come find us on social media (@upworthy) or on upworthy.com!

For scrumptious snacks that add an extra boost of joy to your day, be sure to check out All In.

Family

Some names are music to our ears. Here are the 50 best sounding ones according to science.

Parents filled with baby name anxiety should learn about the Bouba-Kiki effect.

The science why some names, like Sophia, just sounds better than others.

Choosing a baby name is both fulfilling and precarious. Many parents rack their brains trying to come up with the perfect moniker—one that honors their lineage, where they were born, the personality they’ll hopefully have, or all of the above. Obviously, no easy feat.

To make things more complicated, more and more parents are experimenting with trendy or unique-sounding names, which at best can make their kid stand out, and at worse, leave them a bit isolated.

But maybe relying on science could be a more reliable strategy. As author Bill Sullivan, Ph.D., explained in an article for Psychology Today, parents can incorporate a phenomenon known as the Bouba/Kiki effect to help ensure that a name remains appealing throughout a child’s entire life, simply because it will always be pleasant sounding.

Babbel, learning a language, language, sales, dealsA person uses the Babbel appBabbel


Babbel’s Biggest Sale of the Year: Get 67% off. Lifetime Subscriptions For $199

The term “Bouba/Kiki effect” emerged from a set of experiments in which people were presented with both a round and spikey shape, and asked to link the shapes to either the word “bouba,” or “kiki.” The discovery that people consistently agree that rounded shape = “bouba” and the spiky shape = kiki showed that people inherently make image associations for certain words. Collective synesthesia, if you will.

baby names, Bouba-Kiki effect, best sounding names, best girl names, best boy names, unique baby names, classic baby names, Kiki denotes sharpness, where bouba denotes softness. www.labvanced.com

This concept applies to names as well. Sullivan cited a 2015 study which noted that "bouba," or round, smooth sounding names, like “Bob or Molly,” tend to get associated with "easy-going" personalities. Whereas kiki names, like “Kirk and Kate,” tend to sound more abrupt and could be more likely to be seen as “rude.”

In 2022, Bodo Winter, an associate professor in cognitive linguistics at the University of Birmingham, and his team somewhat cemented this theory, after asking hundreds of participants to listen to a list of the 100 most popular names in the UK and the US, and then analyzing those emotional reactions.

There was a clear winner: "Sophia," originating in Greece and meaning "wisdom." While one could argue that the list, which mainly used only names popular in the UK and the US, was somewhat limiting, the name spans many times and cultures, becoming "Sophie" in France and Germany and even "Safiya" in the Muslim communities.

baby names, Bouba-Kiki effect, best sounding names, best girl names, best boy names, unique baby names, classic baby names, Sophias of the world, rejoice. Photo credit: Canva

History and symbolism aside, what really makes Sophia pop comes down to the “soft start of ‘s,’ a roundness offered by the ‘o,’ and a smooth ending with the ‘ia,’” Winter stated. This combination results in universal pleasantness.

If you’re curious as to whether or not your name is audibly pleasing, below are the 50 top ranking names for both boys and girls in the US, courtesy of My1stYears:

1. Matthew, Sophia

2. Julian, Zoe

3. William, Everly

4. Isiah, Sophia

5. Leo, Riley

6. Levi, Ivy

7. Joseph, Paisley

8. Theo, Willow

9. Isaac, Ellie

10. Samuel, Emily

11. Miles, Evelyn

12. James, Eva

13. Elijah, Elena

14. Luke, Chloe,

15. Noah, Nova

16. Santiago, Penelope

17. Owen, Lucy

18. Logan, Lily

19. Liam, Olivia

20. Roman, Naomi

21. Ryan, Emma

22. Cooper, Natalie

23. Jack, Sofia

24. Maverick, Eleanor

25. Anthony, Violet

26. Ezekiel, Bella

27. Carter, Luna

28. Benjamin, Ella

29. Lucas, Victoria

30. Henry, Isabella

31. Jacob, Maya

32. Lincoln, Natalia

33. Mason, Amelia

34. Nathan, Savannah

35. Asher, Charlotte

36. Jackson, Stela

37. Andrew, Hazel

38. Cameron, Athena

39. Alexander, Maria

40. Theodore, Autumn

41. Adam, Kennedy

42. Gabriel, Aurora

43. Kingston, Alice

44. Daniel, Aria

45. David, Harper

46. Hunter, Serenity

47. Dylan, Nora

48. Muhammed, Grace

49. Sebastian, Elizabeth

50. Adrian, Hannah

It probably goes without saying that our own personal preferences, among many other factors, might still influence what sounds appeal to us more (I for one prefer spiky names with a little gusto) but using the simple rules of linguistics could be an interesting, and perhaps less daunting, way for parents to choose a name that’s truly timeless.

"Here's the story of how we created a lush habitat garden."

Nature is healing. After a century of rampant urbanization—deforestation, invasive species, paving paradise and putting up a parking lot—we’re finally coming back to our roots. In Southern California, a mother-daughter design team is leading the way, teaching the public and their clients how to transform ordinary outdoor areas into extraordinary plant sanctuaries. In a viral TikTok video, Donna and Caitlin Whelan demonstrate how they created a lush habitat garden out of an ordinary backyard. It’s captured the hearts of green-thumbed viewers and offers an inside look into the process of eco-friendly landscaping.

Trust the process

Donna and Caitlin run Whelan Design House, a boutique interior design firm that specializes in high-end projects. Drawing on their combined talents and impeccable taste, this mother-daughter team create beautiful living spaces with a human-centered approach. Their commitment to healthy environments shines through in their design philosophy. As they state on their website, "Our world is full of synthetic materials, but we believe there are other options. We guide our clients toward sustainable and environmentally respectful choices and away from chemical-laden fabrics and unhealthy materials."

grass, backyard space, bare, old, before pictureWhere we started.TikTok

Which brings us to the viral backyard renovation. This was more than just a design project: it’s a masterclass in the power of family bonds and environmental innovation. The 18-part video begins with a plain, unremarkable yard. “This is how it looked when we started,” they write. “The grass wasn’t providing anything for the local [ecosystem], and it required way too much water to maintain.”

America has a “perfect lawn” problem. Dreams of white picket fences and a manicured lawn have driven the country into a “green, monoculture carpet,” and our human-dominated landscape is no longer equipped to support functional ecosystems. Like everything else in life, our front lawns do not exist in a vacuum. Everything, from the trees to the flowers to the grass to the soil, all work harmoniously to create a thriving home for insects, birds, and other wild creatures. But when native species are replaced with alien ones, these exotic plants disrupt the flow of life, wreaking havoc and degrading the natural habitat.

So, Donna and Caitlin tore it up. All of it. They removed the neatly cut grass and trees from unknown origins. Ripped up swaths of concrete (“concrete suffocates the soil, preventing the growth of microbes that are essential for healthy soil,” they write).

after photo, pebbles, backyard, green space, oasisParadise in the backyardTikTok

California’s natural beauty

Once the land was returned to ground zero, Caitlin and Donna got to work, replacing the non-native species with ones that were suited to the environment. “Native plants are adapted to the timing of the seasons, harshness of the weather, and water availability of the particular area they evolved within,” describes Defenders of Wildlife, a premier U.S.-based conservation organization. “They are also typically adapted to surviving local pests and, therefore, do not need chemical pesticides.”

So, the dynamic duo began anew, carefully planning and selecting the right plants. They chose drought-tolerant flora that was either native to the area or regionally appropriate, like the wattle-leaf acacia, whose delicate yellow blooms and fern-like leaves added a wonderful splash of splendor to the landscape. Plus, it’s known for its resiliency and minimal water needs—an especially crucial component in Southern California, where droughts are unfortunately quite commonplace. The orange-hued apricot mallow, another star of their garden, brings another pop of color and radiance and attracts butterflies to the space. “The flowers smell like honey,” write the Whelans.


nature. yard, large plants, makeover, native plantsWelcome to Whelan Design House.TikTok

Beyond the lush wildlife, the mother-daughter team also drew upon their impressive art experiences to design the garden of their dreams. They installed a lovely wooden bench, shaded beneath a Palo Verde tree. Small tables that look like sculptures dot the yard. Rustic Saltillo tiles, made of gorgeous terracotta, were used to create a mosaic patio floor. Suddenly, everything clicked. The resulting space is nothing short of awe-inspiring: truly one with nature.

Comments flooded in, with viewers praising Donna and Caitlin for their work. “You created your own slice of paradise while considering the wildlife and native plant species. I’m in awe,” someone wrote. “Thank you for planting native plants in CA, it’s so helpful. So many people buy houses here and plant non-native plants,” another user replied. Their viral TikTok even motivated some to rethink their own backyards. “My house is also a small older Spanish-style with a big backyard,” writes another. “This just inspired me to take action. Even my patio is just like yours, it’s coming down now lol.”

Change is always possible

Tired of mowing the grass and applying harmful pesticides? There are countless ways to incorporate native vegetation into your life, whether you have sprawling acres or a simple, small plot out front. For those interested in following in the Whelans’ footsteps, here’s what you need to know about starting your own native plant oasis:

  • Take stock. Before planning your beautiful new garden, examine your surroundings and evaluate what makes this particular area special and unique. How much sun does the yard typically get? Does it snow here? What’s the elevation like? Is the soil drainage poor?
  • Research, research, research. This is a great excuse for an excursion and to explore your local surroundings! Find a park near you with native plants or a botanical garden. Really get to know your local ecosystem—every region has its own personality and specific native plants that are meant to thrive there.
  • The fun part: Shopping spree. Find a nursery that specializes in native plants. And be curious! Ask questions, like “Where did this plant come from?” “Do I need to fertilize it?” “What soil and soil pH is best?” To create a native plant garden is to become a steward of the land, and the more information you know, the better.
  • Don’t stress. Caitlin and Donna are professionals. You don’t need to transform your entire backyard overnight. Start small, beginning with just a section of the garden. This will take time. In fact, the Whelans note, “patience is incredibly important. The beauty of [the garden] reached new depths with time and only time.”

yard, table, backyard, oasis, makeoverBeauty is possible!TikTok

By choosing native plants and working with nature rather than against it, the Whelans remind us that environmental stewardship is always possible—and can even start in your own backyard. With some careful planning, the correct plants, and an eye for design, anyone can take a step towards contributing to a natural, thriving ecosystem.

Letting teachers know they made a difference is a gift they'll never forget.


babbel, language, learning language, sales, dealsA person uses the Babbel appImage via Babbel


Babbel's Biggest Sale of the Year: Get 67% off. Lifetime Subscriptions For $199


Kindergarten is one of the most formative experiences in a child's life. Not only do they learn there how to navigate the tricky world of friendships and the seeds of independence, they also start their education journey. All of that is made extra special if they have a teacher who really loves them. When you're a kindergarten teacher, you know that you have the power to make a serious impact, and that shouldn't be taken lightly. A retired kindergarten teacher warmed hearts on TikTok as people learn just how great that impact is.

In the video shared by user Kim Hamilton (the daughter of said teacher) in 2022, a woman, who is identified in the comments as Mrs. Pearson, is sitting on her porch when a girl in a cap and gown shows up at the gate. "Congratulations!" Mrs. Pearson calls out, waving. Soon, she realizes that the young girl isn't alone.

@kimhamilton15

#kindergartentograduation

"What's happening?" she asks her daughter, who can be heard chuckling behind the camera.

"They're your kindergarteners," Hamilton replies, as kids in caps and gowns start filing through the gate.

"Did you know this was happening?!" Pearson asks, the shock and joy clearly evident on her face.

"Oh my gosh, I love you all! Look at you!" she exclaims as she runs over to the kids.

graduates, graduation, cap and gownHigh school graduation is a pivotal milestone for teens.Giphy GIF by Kelsea Ballerini

Hamilton explains to her that these kids, clearly high school graduates, are the last group of kindergarten students Pearson taught before retiring. As each one of them comes into the gate, the joy on Pearson's face grows exponentially. It's clear that these kids were her babies, and even though now they're all grown up and going off to college, they'll always have that special place in her heart.

"Oh my god, you're all just gorgeous!" she says, giving each one a hug.

graduation, graduate, cap and gown, hugging graduateTeachers love to see their students succeeding, no matter how long it's been.Photo credit: Canva

The kids are just as happy to see their beloved Mrs. Pearson as she is to see them. They eagerly shuffle together to pose for a picture as she just stops and looks at them, taking it all in. Presumably, she hasn't seen them much in the approximately 12 years since she retired. Maybe they've seen each other around—as a kid, I loved running into my teachers outside of school. I still do. But the fact that these kids showed up to see her, to allow her to celebrate her integral role in their lives, that's really special. And I'm not the only one who thinks so.

Here are just a handful of the comments people left on Hamilton's video:

"Proof they never stop being our kids after they leave us."

"The love she showed and was shown, she must have been one heck of a teacher 💕"

"I started crying when your mom did."

woman tearing up, getting emotionalBig Brother Omg GIF by Global TVGiphy

"Love this! ❤ I teach kindergarten and only hope my students will remember me like this! She must have been extraordinary!"

"Literally teachers like HER are the reasons I still talk to my teachers from middle school, HS & college🥺 good teachers are so special."

"The best gift a teacher can receive is seeing her former students bloom."

Teachers can truly make a lifelong impression on us, for better or for worse. When you get a good teacher at any age, it's never too late to offer them your gratitude and appreciation.

This article originally appeared three years ago.

Albert Einstein using a blackboard.

Highly intelligent people come in all types. Some have no problem bragging about their smarts or accolades, while others are more humble because they don’t need to call attention to their brilliance. However, without tooting their own horn, certain hallmarks of intelligence are noticeable in how they approach people and situations. It seems that having a big brain is a hard thing to hide.

One of the undeniable characteristics of someone very intelligent is that they exhibit mental flexibility. They change their opinions when they don’t have enough information on a topic and can apply what they’ve learned from one subject to another. They also tend to have a great sense of humor, proving that their brain can easily connect different ideas.

A Redditor asked people on the ProductivityCafe subforum to share the “subtle signs that someone is intelligent.” It created great conversations about the characteristics of intelligent people and how their smarts seem to influence every part of them, from their personality to their ability to avoid unnecessary conflict.

smart people, thoughtful people, intelligence, signs of intelligence, reading, booksA man reading a book in his library.via Canva/Photos

Here are 15 subtle signs that someone is very intelligent.

1. Curious about multiple subjects

"They like to learn about any and everything."

"And remember details and concepts later. A desire to understand and curiosity about the subject at hand."

2. They change their minds

"They can change their mind when presented with new information."

"This is definitely the best / most noticeable answer. Intelligent people agnostically process new information. They don’t just “automatically” deny anything that they don’t know or is inconsistent with what they already know. Intelligent people - it’s not what they know, it’s how they interpret / process new information."

"As John Nash, the mathematician allegedly once said; when the facts change, I change my mind!"

3. They process humor quickly

"They get the joke sooner than most people. Happens once in a while in movies or group settings: one person starts to laugh way ahead of everyone else. That’s one with a super fast processing mind (I know one). It is totally unconscious, so cannot be faked."

4. They like being corrected

"When you correct them, they're actually happy about it because they get to learn something new."

"100%. This is often referred to as growth mindset."


5. Great sense of humor

"Humor is a marker for intelligence. Truly dumb people aren’t funny."

"Agreed but I would add that witty or dark humor is more intelligent than mean, cruel, gross humor. If someone’s 'wit' is just the same structure of putting other people down or being gratuitously shocking or gross, then no."

"A really good sense of humor. To be really funny, you have to be very observant and able to see things in ways that others don’t."

6. They make you feel smart

"They explain some things to you in a way that makes you feel intelligent."

"Einstein said, 'If you can't explain what you are talking about to a six-year-old, you don't fully understand it yourself.'"

7. They think before they respond

"They don't react. There is always a delay... and then, they respond."

"They observe, they pause, and then comes the long encyclopedic reply."


thinking, intelligence, being smart, smart people, thoughtful people, consideration, woman, touching chinA woman thinking about her response.via Canva/Photos

8. They know when to be quiet

"Yes, I have come across people with no filter, and have to argue about everything, and that can be exhausting."

"Never miss a good opportunity to shut the f**k up."

9. They're great at banter

"Yes, and quick word play/good puns."

10. They ask about your thought process

"If someone is inquisitive. They want to know how and why you think the way you do. Most people don’t do this."

11. They know what they don't know

"Even very intelligent people don't know about every topic. They understand this and don't pretend to be an expert or speak to things they don't specialize in. Or they use analogies to connect it to things they do understand.They understand that there is a lot they do not know, especially about their given specialties."

"Some people have so much ego, that they have an inability to say that they don’t know the answer to a question. They’ll either give a bullsh*t answer, or try to shrug off the patient’s concerns entirely. Nobody knows everything. If you don’t know, there’s no fault in admitting that, and then using resources to find the answer."


12. Physical intelligence is important, too

"I wish people could understand intelligence in many forms—being good with your hands is intelligence. Being able to learn elaborate choreography is intelligence. Being emotionally responsive and understanding microexpressions is intelligence. It’s not just regurgitating facts. I’m a fact regurgitator myself, but I have a lot of respect for things I can’t do."

13. They don't get into drawn-out arguments

"Not raising their voice during a disagreement. Shouting over each other is to try and win an argument with intimidation rather than logic."

"Argue with an idiot and there's two idiots."

14. They think for themselves

"They don’t have herd mentality. Specifically in politics, religion, and pseudoscience."

"I remember the first time that I understood that not picking a side was a valid option for many situations. It was like a record skip moment in my head."

15. They use a bidet

"They own a bidet and don’t use toilet paper."

Learning to make sounds we didn't grow up with can be tricky.

When (or if) kids learn phonics at school, they're taught the symbols that go with sounds of their country's native language or languages. People all around the world grow up learning to make specific sounds with their mouths by imitating the language(s) they are immersed in, which can leave us completely unaware of how many other sounds there are until we hear a language that's far different from our own.

Even the common foreign languages that American school kids learn have sounds that can be tricky to get down. The rolled "r" in Spanish. The nuances of French vowel pronunciations. The glottal stops in German. The sound that's a mix between "r" and "l" in Japanese. And for people learning English, one of the trickiest sounds to get down is "er," as in the American pronunciation of "bird," "world," "summer," or "percent."

Oddly enough, for as common as the "er" sound is in English, it's linguistically rare. According to the Linguistics Channel @human1011, the "er" sound is found in less than 1% of the world's languages, rarer than the click consonants found in some languages in East and Southern Africa.

- YouTubewww.youtube.com

As rare as the sound is, there are a lot of people in the world who use it, mainly because it's also used in Mandarin Chinese, or at least many variations of it. So, while there aren't many languages that use it, by sheer numbers of people, it's not that uncommon.

"So, a sound that's so rare that it's in less than 1% of the world's languages just happens to exist in the two most spoken languages on Earth? Can that really be a coincidence?" the @human1011 video asks. Well, yes. English and Chinese don't share a common linguistic root, so those sounds just happened to evolve in very different parts of the planet. According to some people in the comments of the video, there are regional dialects in Brazil where the "er" sound is used and in certain parts of the Netherlands as well.

Pronouncing the "er" sound is hard if you don't grow up with it, largely because it's all about the placement and shape of the tongue inside the mouth combined with the way the lips are positioned. That combination is physically tricky to show someone. This video, from a non-native-English-speaker does a good job of explaining the mouth movements that create the sound.

- YouTubewww.youtube.com

What's particularly interesting about the "er" sound in American English is that it functions as a vowel sound. Most of us learned that the vowels in English are a, e, i, o, u, and sometimes y, and that's true as far as written vowels go, but vowel sounds are different. In the word "bird," the letter "i" is a vowel, but doesn't make any of the "i" sounds that we learned in school. Instead, the "ir" combine to make the "er" vowel sound. It's called an r-controlled vowel, and we see it in tons of words like "work," "were," "burn," "skirt," etc.

Learn something new every day, right?

Here's another video that explains the physical aspects of articulating the r-controlled vowel sound.

- YouTubewww.youtube.com

Most of us don't think about the fact that sounds we pronounce without even thinking about it have to be specifically learned and practiced by people who didn't grow up with them. It's not until we start trying to learn a language that's different from our own that we see how many sounds we have to work hard to make, sometimes even having to train our mouth muscles in ways they've never been used before.

It's also a good reminder to be patient and kind with people who are learning a language. It's not easy, and anyone making an effort to communicate in someone else's language deserves our grace and kudos.

You can follow @human1011 on YouTube for more interesting linguistics trivia.