Science

WTF Fun Fact 13053 – The Mere Exposure Effect

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We tend to find things more pleasant and attractive the more we see them. When it comes to people, we tend to find their faces more attractive the more familiar we are with them. This is called the “mere exposure effect” (or “familiarity principle”).

The mere exposure principle

By merely exposing our brains to the sight of a person, we can build pathways that make them seem more attractive to us over time. The familiarity alone is enough to make us feel better about them. (Of course, this isn’t always the case, especially when there’s bad behavior involved.)

Research on this effect goes back to the early 19th century when German Gustav philosopher and experimental psychologist Gustav Fechner and Edward B. Titchener, who studied the structure of the mind. However, early hypotheses were eventually rejected, and it wasn’t until the 1960s that they were revived.

In the 60s, Polish social psychologist Robert Zajonc found that the brain’s exposure to novel stimuli elicited a fear or avoidance response. In other words, new things make us nervous. The same is true in both humans and animals.

But he found that each time a person viewed that stimulus again, there was less fear and more interest in the object. And after repeated looks, the observing person or animal will begin to act more fondly towards the object that was once new.

The black bag experiment

Wikipedia sums up a critical experiment in 1968 best:

“Charles Goetzinger conducted an experiment using the mere-exposure effect on his class at Oregon State University. Goetzinger had a student come to class in a large black bag with only his feet visible. The black bag sat on a table in the back of the classroom. Goetzinger’s experiment was to observe if the students would treat the black bag in accordance to Zajonc’s mere-exposure effect. His hypothesis was confirmed. The students in the class first treated the black bag with hostility, which over time turned into curiosity, and eventually friendship. This experiment confirms Zajonc’s mere-exposure effect, by simply presenting the black bag over and over again to the students their attitudes were changed, or as Zajonc states “mere repeated exposure of the individual to a stimulus is a sufficient condition for the enhancement of his attitude toward it.”

This may have to do with perceptual fluency. In other words, our brain just have an easier time processing objects that they’ve already processed in the past.

However, when marketers try to use this to increase our familiarity (and propensity to buy something) by sticking it in our faces constantly, it doesn’t always work. In some cases, familiarity can breed hostility. — WTF fun facts

Source: “Mere-exposure effect” — Wikipedia

WTF Fun Fact 13042 – The World’s Oldest Tattoos

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Right now, the world’s oldest tattoos date to around 3300 BCE. But dating isn’t an exact science. In addition, one tattooed body was found in the deserts of Egypt, while the other was encased in ice in the Alps. While that makes it harder to piece apart the details, it does tell us that tattooing is at least 5000 years old – and by that time, it was already being practiced on two continents!

The first discovery of the oldest tattoo

We know that the ancient Greeks and Romans used tattoos to brand enslaved people or signal a person of a particular profession (like prostitutes). But the practice appears to have been initially related to art, medicine, or spirituality. Without more evidence, we can only guess.

The “Iceman” known as Ötzi was discovered naturally mummified by ice in 1991 in the Alps between Austria and Italy. He was found with many wounds and is believed to have been murdered.

For two decades, Ötzi was our oldest example of a person with a tattoo. He had 61 of them, divided into 19 groups of black parallel lines grouped together. The tattoos can be found along his lumbar, behind his right knee, right ankle, along his legs, and on his left wrist. The “ink” appears to have been made from fire ash.

Since age and strain-induced degeneration have been discovered in those same areas, some researchers believe the tattoos were for healing purposes. Nearly half are located along what is currently known as acupuncture lines. However, the body dates to 2000 years before the use of this practice in China.

While Ötzi is fascinating, he may no longer be the oldest tattooed body.

Pushing back the dates for the world’s oldest tattoos

In 2018, two mummies dating from around the same time as Ötzi were found with tattoos – on a different continent. These mummies were in Egypt, and it took years for researchers to even notice the tattoos.

Multispectral techniques were used to reveal these tattoos – and at least one of the bodies may be older than Ötzi’s.

The British Museum’s blog notes that a male mummy known as “Gebelein Man A,” had a tattoo on his bicep:

“Dark smudges on his arm, appearing as faint markings under natural light, had remained unexamined. Infrared photography recently revealed that these smudges were in fact tattoos of two slightly overlapping horned animals. The horned animals have been tentatively identified as a wild bull (long tail, elaborate horns) and a Barbary sheep (curving horns, humped shoulder). Both animals are well known in Predynastic Egyptian art. The designs are not superficial and have been applied to the dermis layer of the skin, the pigment was carbon-based, possibly some kind of soot.“

A female mummy from a few hundred years later also had tattoos. That means it was not just a practice among men. It turns out the world’s oldest tattoos are a puzzle for the ages.

As Open Culture (cited below) notes: “In Middle Kingdom tattooing practices, a series of marks seemed to provide protection, especially in fertility and childbirth rites, functioning as permanent amulets or a kind of practical magic…And it does seem clear that tattooing was important to ancient, Predynastic men and women, maybe for similar reasons.” — WTF fun facts

Source: “The Oldest Tattoos Ever Discovered on an Egyptian Mummy Date Back 5,000 Years” — Open Culture

WTF Fun Fact 13035 – The Truth of Fake It Til You Make It

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The last thing any unhappy person wants to hear is “smile,” “cheer up,” or “can’t you just try to be happy?” The answer to all of those requests is usually “no.” But once those people leave the room, you may just want to try it out next time you’re grumpy. It turns out there’s some truth to the whole “fake it til you make it” thing.

Smile though your heart is aching

It’s hard, perhaps impossible even, to smile all the time. But if you’re in a bad mood and you’d rather not be (and let’s face it, sometimes we want to wallow), your physiology can sometimes affect your mood.

In other words, smiling may help you change your emotional trajectory.

According to Psychology Today (cited below):

“This might sound odd, as convention dictates that when you are happy, you smile and laugh, and when you are sad, you frown and cry. However, it turns out that the relationship between your emotions and your behavior is a little more reciprocal than that. This means that if you force a smile when you are feeling down, you will lift your mood, and alternatively, if you frown when you are happy, you will feel down.”

Fake it til you make it

This is based on real research, not just a web column. In fact, it’s based on a review of over 100 research studies that showed a connection between people faking a mood and then recording how they felt afterward. Researchers showed that to some small extent “an individual’s experience of emotion is influenced by feedback from their facial movements.” It’s called the facial feedback hypothesis.

This tracks with another principle called the Hebbian theory, or Hebb’s Law, stating that “neurons that fire together wire together.” (However, Hebb’s Law has more to do with learning.)

The point is that if you can muster a smile and even a joyful tone, you can trick your brain into releasing some of those happy chemicals. (There’s also the possibility that the people around you will be happier. And this tends to make situations more pleasant too.)

We’re not saying you should force a smile all the time. But if you’re looking to lift your mood, the answer lies inside you.

Providing facial feedback

The facial feedback hypothesis is partly based on the work of Charles Darwin, who noted that facial expressions can affect a person’s emotional experience. And since Darwin was deeply depressed for much of his life, we imagine he tried it for himself on more than one occasion.

Researchers have tried to see if smiling helps improve mood without even asking a person to fake a grin. They just had subjects put a pe between their teeth to make the right muscles move. Moods lifted. A pen between the lips tended to lessen the cheer, however, since that activated frowning muscles.

And the effect doesn’t appear to be limited to smiling either – posture can help. Unslumping shoulders, standing up straight, and holding your head up all help. These actions can make it easier to engage with people in a positive way, improving your mood. It also helps with confidence (and first impressions).

Some version of the “fake it til you make it” adage has been around for a long time. For example, philosopher William James once wrote: “If you want a quality, act as if you already have it.”

Of course, that doesn’t make it ok to tell someone to smile. — WTF fun facts

Source: “How “Fake It ‘Till You Make It” Really Is a Thing” — Psychology Today

WTF Fun Fact 13022 – The World’s Fresh Water

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Seventy-one percent of the Earth is covered in water, but that doesn’t mean we can use it all. But what percent of the world’s water is fresh (and therefore useable for humans to ingest)? Just 2.55 – and much of that is trapped in glaciers. Only 0.007% is available to us for use. The rest is saline and ocean-based. Interestingly, that’s roughly the same amount of freshwater that has always existed on Earth.

The world’s freshwater

Water is a valuable resource. If you’ve ever been without fresh water, even for a short time, you probably know exactly how panic-inducing a lack of fresh water can be. But for many people, fresh water is something we’ve always had and never really questioned. Those are the lucky minority.

It’s a bit startling to realize that the Earth’s freshwater resources have been around for hundreds of millions of years. What we drink has been recycled many, many times, whether it’s via the atmosphere or through our drinking water cups (and we’ll leave you to figure out how that works and then appreciate your local water treatment facility on your own).

Because we have very limited means of creating potable water out of saltwater through desalinization technology, it’s very hard to make enough new freshwater to sustain more humans. And that’s bad news when you think about how much water goes into things we enjoy – NatGeo says “the average hamburger takes 2,400 liters, or 630 gallons, of water to produce.

Fresh water keeps us alive

An increasingly large human population means we will need more water for hygiene, cooking, and drinking.

According to National Geographic (cited below): “Water scarcity is an abstract concept to many and a stark reality for others. It is the result of myriad environmental, political, economic, and social forces.” It has always been this way – people have fought wars over access to freshwater supplies for thousands of years.

“Due to geography, climate, engineering, regulation, and competition for resources, some regions seem relatively flush with freshwater, while others face drought and debilitating pollution. In much of the developing world, clean water is either hard to come by or a commodity that requires laborious work or significant currency to obtain,” they note.

—WTF fun facts

Source: “Freshwater Crisis” — National Geographic

WTF Fun Fact 13021 – The Scully Effect

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The way we see scientists portrayed in books, movies, and television shows shapes the way we think about science in general. It also affects whether we can relate to the idea of being a scientist. This is especially important for women, who are underrepresented in most science fields. That’s part of what makes the Scully Effect so remarkable.

What is the Scully Effect?

Dana Scully was a character on the iconic television show The X Files. She was one of the first visible examples of a female scientist on a long-running television show. And it turns out that Gillian Anderson’s portrayal of the character changed the way viewers thought about the role of women in science.

According to a blog published by Westcoast Women in Engineering, Science, and Technology (WWEST) on Simon Fraser University’s website (cited below), “a phenomenon called ‘The Scully Effect’ has been anecdotally reported among fans of the TV show The X-Files and women in Science, Technology, Engineering, and Math (STEM) fields.”

In 2017, WWEST started a project called Media Depictions of Women in STEM “to evaluate how woman characters in STEM are depicted in popular media and how this might shape viewers’ ideas of women’s role in STEM (especially viewers in elementary and secondary school).”

They also reported that “a study by the Geena Davis Institute has examined just how much the character of Dana Scully has influenced girls and women to focus on STEM in their schooling and careers.”

What does the research show?

There were 2,021 participants in the study, in which :
– 63% of women who were familiar with Dana Scully said she increased their belief in the importance of STEM.
– 50% of those same women said Scully increased their interest in STEM.
– 43% of women who were medium to heavy viewers of The X-Files were influenced to consider working in STEM fields by Scully.
– 27% were convinced to actually study STEM.

Gillian Anderson said of “The Scully Effect”:

“At the time that Scully showed up [in 1993], we didn’t see that type of female represented very much at all out in the world of television, which is what we look to more and more as examples of who we are and to help make sense of us as human beings. And so, to suddenly have an appealing, intelligent, strong-minded female who was appreciated by her pretty cool male coworker was an awesome thing to behold, and I think that a lot of young women said, ‘That’s me. I’m interested in that. I want to do that. I want to be that.’”

Other research has shown that children tend to associate men with science around age seven due to cultural depictions of men in books, shows, and films. But when this can be prevented by also showing women as scientists, girls are more likely to believe that science is a general career path open to them as well. — WTF fun facts

Source: “The Scully Effect” — Simon Fraser University

WTF Fun Fact 13016 – Petting an Animal Reduces Stress

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You’ve probably heard that petting an animal reduces stress. If you’re lucky, you’ve even experienced it firsthand. And if you have the pleasure of consistently getting some hands-on time with a furry companion (or even a pal’s pet), you may not always notice it, but you probably do have less cortisol in your system.

How does petting an animal reduce stress?

One of the most oft-cited studies about the animals reducing our stress comes from a study in the journal of the American Educational Research Assocation (AERA). It was a rigorous study that controlled for multiple other factors, such as overall health of the subjects. And it found that just 10 minutes of petting a cat or dog (many of which happened to come from a shelter and probably benefitted from some socialization) results in measurably smaller levels of cortisol, the hormone that regulates our flight-or-fight response.

The research was done on college students (who often get stressed out around midterms and finals). And one of the best parts was that even brief animal encounters could help reduce stress levels.

The researchers didn’t find the same effect when students viewed photos of pets or saw them in person – the real benefits came from physical contact.

Details of the study

The researchers collected saliva samples from 249 college students who participated in one of four types of animal encounters. (Cortisol levels can be measured using saliva.)

  • 73 students got to pet the cats and dogs
  • 62 watched other people pet the animals
  • 57 watched a slideshow of images of the same animals
  • 57 remained on the waitlist

Saliva samples were collected first thing in the morning and then two more samples were collected 15 and 25 minutes after the animal encounter.

Students with hands-on animal interactions had the lowest cortisol levels, though it didn’t necessarily last throughout the day. Still, even momentary stress relief can help regulate stress.

The researchers hope the knowledge that petting animals reduces stress will help colleges (and others) help people regulate stress before it causes more serious physical and psychological disorders. — WTF fun facts

Source: “Animal Visitation Program (AVP) Reduces Cortisol Levels of University Students: A Randomized Controlled Trial” — AERA Open

WTF Fun Fact 13009 – Cats Domesticated Themselves

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If you’ve ever been owned by a cat (or have been given the honor of being allowed to live alongside one), you know they will do whatever they want to do. So it may come as no surprise that cats domesticated themselves. They just decided to move in with humans – and not much about them has changed since that day.

How do we know cats domesticated themselves?

If you’re skeptical about this and how we know it (or even what it all means), that’s fair.

Here’s the thing – when humans domesticate animals, we choose certain characteristics that we like about them, and the animals that end up allowing this kind of domestication often have certain kind of characteristics (whether it’s size, a tendency to be docile, etc.). Those characteristics are, to some extent, encoded in their genomes. So if we look at the genomes of those animals over thousands of years, we should see changes that indicate the selection of certain traits.

It’s not much different than modern dog breeding – purebred dogs are specifically bred to have specific genes that make them look or act a certain way. Their environment plays a role too, but we can see a lot of characteristics in their genomes.

Cat genomes? Let’s just say they haven’t changed much at all. And we know that because cats have been cherished and worshipped for thousands of years and therefore buried in ways that allow us to collect even their ancient DNA.

What do cat genomes tell us about domestication?

Of course, we can’t go back in time to check our work, but we can do pretty comprehensive studies on cats from all over the world and from different time periods. And that’s what a group of scientists did. They published their study in the journal Nature Ecology & Evolution under the not-very-catchy title “The palaeogenetics of cat dispersal in the ancient world.” It doesn’t sound riveting, but it’s pretty cool (especially if someone summarizes it for you).

Our favorite line comes from National Geographic’s write-up on the work (cited below), noting that “[cats’] genes have changed little from those of wildcats, apart from picking up one recent tweak: the distinctive stripes and dots of the tabby cat.”

But here’s the gist of it: The researchers looked at the DNA of over 200 cats. These cats spanned a timeline of 9,000 years, the ancient cats coming from Rome and Egypt. They found that there were two major cat lineages that came together to make modern housecats. Normally, you’d expect to see A LOT more diversity than that.

Early cats likely spread into Europe from southwest Asia around 4400 BCE and hung out with people in early farming communities. Apparently, cats just decided people were largely ok to be around, and people decided cats were ok because they killed rodents that interfered with crops. If anyone tried to do anything more to domesticate cats, they clearly failed.

It was a mutually beneficial relationship. And maybe cats didn’t even like people but just liked the rodent populations we attracted. We’ll never know. But in any case, we all just grew up alongside each other. Humans “let” cats domesticate themselves. (Frankly, our guess is that cats were in charge the whole time.) — WTF fun facts

Source: “Cats Domesticated Themselves, Ancient DNA Shows” — National Geographic

WTF Fun Fact 13008 – Financial Stress Lowers IQ

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Fun Fact: “A Harvard study found that our IQs can drop by 13 points when we are under financial stress. This is in part due to the amount of brain power we use to think about any financial burdens we carry, causing distraction.”
Are you surprised to hear that financial stress lowers IQ?

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According to Canada’s CBC News (cited below), “People struggling to pay their bills tend to temporarily lose the equivalent of 13 IQ points, scientists found when they gave intelligence tests to shoppers at a New Jersey mall and farmers in India. The idea is that the financial stress of trying to make ends meet monopolizes thinking, making other calculations slower and more difficult, sort of like the effects of going without sleep for a night.”

Financial stress and IQ

We know IQ tests aren’t reliable indicators of innate intelligence, but they can be used to measure changes in a person’s cognitive capacity under different conditions. In other words, we don’t have to compare a person’s scores to anyone else’s, we can compare their specific scores without making judgments about their overall intelligence.

CBC described the study:

“The scientists looked at the effects of finances on the brain both in the lab and in the field. In controlled lab-like conditions, they had about 400 shoppers at Quaker Bridge Mall in central New Jersey consider certain financial scenarios and tested their brain power. Then they looked at real life in the fields of India, where farmers only get paid once a year. Before the harvest, they take out loans and pawn goods. After they sell their harvest, they are flush with cash.

[Harvard researcher Sendhil] Mullainathan and colleagues tested the same 464 farmers before and after the harvest and their IQ scores improved by 25 per cent when their wallets fattened.”

What the study doesn’t mean

The study does not mean that rich people are smarter than people who are having temporary or long-term financial difficulties. It only means they have more cognitive resources to “spend.” They can think more clearly and concentrate better on other tasks since they’re not worried about money. — WTF fun facts

Source: “Financial stress can induce drop in IQ” — CBC News

WTF Fun Fact 13006 – Brain Cells Learn To Play Pong

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Fun Fact: Lab-grown human and mouse brain cells living in a petri dish became sentient enough to learn to play the video game Pong.
That’s right – scientists found that brain cells learn to play Pong, the 1970s tennis-type video game.

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In news that we don’t find even remotely comforting, brain cells grown in a petri dish have been shown to become sentient enough to learn to play video games. And we’re not kidding when we say that their next plan is to get the brain cells drunk and see what happens.

Sentient brain cells living in a dish

To be clear, these are cells that are living in a petri dish – not a person. They are human cells derived from stem cells and mouse cells derived from embryonic cells. There are 800,000 cells in total involved in the experiment.

Not only have the cells learned to play the game Pong, but they keep improving. “They played longer rallies and were aced less often,” reported The Guardian (cited below). Of course, Pong is a very simple game, which is why the researchers chose it in the first place.

The study that revealed the experiment was just published in the journal Neuron.

The researchers hail from Cortical Labs, Monash University, the University of Melbourne, and University College London.

How can brain cells learn to play Pong?

According to The Guardian, the researchers out the cells on something called the “DishBrain,” “a multi-electrode array that can sense cell activity and stimulate the cells, then gave the cells feedback on whether the paddle was hitting the ball.”

Within five minutes the cells started to communicate using electrical activity to operate the game. It sounds like sci-fi, but it’s true.

“Now the researchers will see how the cells perform when they are drunk or given medicines. They hope to use the DishBrain to learn more about conditions such as epilepsy and dementia.”

“This is the new way to think about what a neuron is,” a researcher said. — WTF fun facts

Interested? See for yourself:

https://youtu.be/x0NM7iVo9MQ

Source: “Scientists teach brain cells to play video game Pong” — The Guardian

WTF Fun Fact 13002 – Keeping Secrets

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Fun Fact: Keeping secrets is a universal phenomenon. Researchers found that approximately 97% of people are keeping a secret at any given time, and the average person is currently keeping around 13 of them (though not all are because of shame or guilt).

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What aren’t you telling us? What are you hiding? Nothing? Ok. Then are you hiding big surprise from someone? Are you pregnant and not telling anyone? Are you buying us a pony for Christmas? No. Darn.

Well, chances are you’re holding onto at least one secret – and you’re more than likely keeping a whole bunch across a handful of different categories. Not all secrets are sinister, and some we’d probably rather people kept to themselves.

Secrets are interesting things, which is why psychologists study them.

The anatomy of a secret

The American Psychological Society (cited below) wrote about the work of some of their members, and it’s fascinating stuff.

First, you may be interested to know that sharing this private information and asking people to keep it from others is burdensome (so maybe you should keep some to yourself). Then again, researchers also found that sharing secrets is a great way to bond with people and show them you trust them.

Dr. Michael Slepian, associate professor of leadership and ethics at Columbia Business School, described his interest in the psychology of secrets:

“For decades, secrecy research focused on the effects of concealment. But I couldn’t find any studies that systematically looked at what secrets people keep, how they keep them or how they experience secrets on a day-to-day basis.” This led him to survey around a thousand people and try to categorize the types of secrets they keep.

Types of secrets

The first step was to define acts of secrecy, which they did broadly, “defining secrecy not just as the moment of actively withholding information, but also having the intention to keep something secret from another person—even when that other person isn’t physically present.”

After categorizing the types of secrets people keep (for example, things related to infidelity, illegal behavior, planned surprises, pregnancy, etc.), he and his colleagues discovered that the things people keep to themselves generally fell into about 38 common categories.

“We all keep the same kinds of secrets,” Slepian told the APA. “About 97% of people have a secret in at least one of those categories, and the average person is currently keeping secrets in 13 of those categories.”

The biggest harm of keeping a secret was a person’s tendency to ruminate on it, which happened far more often with negative secrets. Interestingly, people tend to dwell on things that make them feel ashamed – even more than they ruminate on secrets that make them feel guilty. That’s because shame makes you feel like a bad person and breeds feelings of helplessness or powerlessness.

Divulging secrets

Divulging these previously private things can be a double-edged sword, of course. But talking to people can reduce the shame. Slepian found that “thinking about a secret can create a motivational conflict in which a person’s need to connect with others directly clashes with their desire to keep their secret to themselves.”

After finding 38 categories of secrets among hundreds of people, Slepian’s team also found that “confiding a secret predicted improved well-being, both because the participant received social support and because the act of revealing the secret seemed to minimize the amount of time the person spent thinking about it.” — WTF fun facts

Source: “Exposing the hidden world of secrets” — American Psychological Association

WTF Fun Fact 12993 – Point Nemo

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Point Nemo is a cemetery you can’t visit. It lies in the ocean’s “point of inaccessibility” because it lies over 1,600 miles from any land mass. In fact, it’s the furthest point from any land mass on Earth, which is a “fun fact” in itself. But our point is that Point Nemo is a special kind of burial ground – it’s a space cemetery under the sea.

Point Nemo the space cemetery

At the end of the journies to the farthest reaches of space, satellites, rockets, space stations, and the “junk” that comes down with them end up in this lonely spot deep in the Pacific Ocean.

It’s named not for Disney’s fishy character but for a more distinguished fictional Nemo – the submarine captain in Jules Verne’s classic 20,000 Leagues Under the Sea.

Someday, when it’s no longer a bastion of the latest space technology, it is where the International Space Station will be laid to rest.

The land of “space junk”

According to The Guardian (cited below): “When spacecraft die, they become a danger to everything else in orbit. Space debris is rapidly clogging up space, and at orbital speeds of up to 17,500km/h even tiny flecks of paint can cause serious damage to other spacecraft.”

According to science writer Jessica Baron the ISS itself is in danger from “space junk”, noting that “Even as far back as 2013, NASA reported that it was monitoring over 500,000 pieces of debris, 20,000 of which were larger than a softball. Because the “space junk” can travel at speeds of up to 17,500mph, even a small piece can pose a major collision risk for future missions and the ISS.”

This possibility is called the ‘Kessler Effect,” and The Guardian says “The Kessler Effect, or Kessler Syndrome, is the potential for the amount of debris in orbit to reach a critical mass where each collision creates more pieces of debris in a cascading way, to the point where the orbit is no longer usable.”

While some have considered building a giant space harpoon to catch this trash, most pieces are too small, so “To prevent such a disaster, anyone launching something into orbit these days has to have a plan to either send it into a graveyard orbit, or send it back down to burn up in Earth’s atmosphere,” NASA says.

And that’s where Point Nemo comes in. — WTF fun facts

Source: “Thousands of kilometres from anywhere lies Point Nemo, a watery grave where space stations go to die” — The Guardian

WTF Fun Fact 12990 – The Lake Erie Mirage Effect

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No one’s eyesight is good enough to be able to see Canada from Ohio. But some people looking across Lake Erie insist that they can. It’s called the Lake Erie Mirage Effect.

What’s the Lake Erie Mirage Effect?

In Northeastern Ohio, there are days when people look out across Lake Erie and see the Canadian shoreline. However, that shoreline is over 50 miles away. It’s rare to see it, but the strange phenomenon has an explanation.

The curvature of the Earth prevents us from seeing objects that far into the distance. However, under the right conditions, the Lake Erie Mirage appears.

This is due to temperature inversion and super-refraction. Temperature inversion is a phenomenon in which temperature increases with height (normally it’s the other way around). This causes density changes in the air that make sunlight bend downward (that’s the super-refraction). As a results, the naked eye can see things far beyond the horizon.

What conditions are necessary to see the mirage?

First, the lake needs to be cooler than the air above it for the temperature inversion to occur. The cold lake makes the air right above it colder, but the farther you go up, the warmer the air is since it’s not being immediately cooled by the lake.

Warm air is less dense than cool air, so it creates a “cap” that flows over the cool air beneath it. When the sun comes out, the light rays bounce off that cap and bend down towards the surface.

This lets us see around the curvature of the Earth. But to get the Lake Erie Mirage Effect, you also need calm winds, so the mirage doesn’t get distorted.

It’s all pretty rare, but Canadians can see Clevelanders driving down the street when the conditions are right on their side too. — WTF fun facts

Source: “What weather conditions allow Northeast Ohioans to see the Canadian shoreline across Lake Erie?” — Cleveland.com

WTF Fun Fact 12986 – Healing A Broken Heart

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All you need is love. Well, all you need is oxytocin, really. That’s the brain’s “love hormone.” When it’s released into our bloodstream by our hypothalamus, it helps us bond with others and feel happy. And it turns out it could also be the key to healing a broken heart.

And we mean the real kind of broken heart – this hormone may be able to help cardiac health after a heart attack, at least according to a study using zebrafish and human cells.

Studying how to heal a broken heart

 Frontiers in Cell and Developmental Biology published the study, which found that oxytocin also has the ability to “promote the regeneration of the heart after an attack.”

According to IFL Science (cited below): “During a heart attack, cardiomyocytes – highly specialized cells responsible for heart contractions – die off. This can be a problem as they cannot replenish themselves.”

However, it appears that a subset of cells in the outer layer of the heart can undergo reprogramming and become something calls Epicardium-derived Progenitor Cells (EpiPCs). The cool thing about EpiPCs is that they can eventually become different types of heart cells, including the ones that are killed off during a heart attack.

Unfortunately, these EpiPCs need some help since they can’t regenerate fully under normal conditions. That’s why researchers looked at zebrafish.

Zebrafish are able to regrow parts of their heart. Naturally, scientists wanted to see just how they managed to do it so efficiently in the hopes that they could spur this regeneration in humans.

The role of oxytocin

The experiments involved injuring the hearts of zebrafish (through freezing them). Researchers found that the genetic material that leads to oxytocin production showed a 20-fold increase in the brain. This triggered a biological process that ended in some cells turning into EpiPCs and migrating to the heart to develop into cardiomyocytes.

“Here we show that oxytocin, a neuropeptide also known as the love hormone, is capable of activating heart repair mechanisms in injured hearts in zebrafish and human cell cultures, opening the door to potential new therapies for heart regeneration in humans,” lead author Dr. Aitor Aguirre said in a news release.

Now, the question is whether we can make something similar happen in humans.

It turns out it may be possible. But we’ll have to find a way to activate the production of oxytocin in order to produce EpiPCs.  

“Oxytocin is widely used in the clinic for other reasons, so repurposing for patients after heart damage is not a long stretch of the imagination. Even if heart regeneration is only partial, the benefits for patients could be enormous,” Aguirre added.

Next steps towards healing a broken heart

Now, the team will need to look at oxytocin production in humans who have experienced cardiac injuries as well as drugs that can stimulate oxytocin production. But before working on humans, it’ll have to go through a pre-clinical trial stage.

“Next, we need to look at oxytocin in humans after cardiac injury. Oxytocin itself is short-lived in the circulation, so its effects in humans might be hindered by that. Drugs specifically designed with a longer half-life or more potency might be useful in this setting. Overall, pre-clinical trials in animals and clinical trials in humans are necessary to move forward,” Aguirre concluded. — WTF fun facts

Source: “Love Hormone” Oxytocin Could Help Mend A Broken Heart” — IFL Science

WTF Fun Fact 12978 – How Does Temperature Affect the Color of Leaves?

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Have you noticed that autumn looks a bit different every year? Sometimes the leaves fall early. Other times they’re on the trees much longer to give a full display of color. A lot of this has to do with the temperature outside. But how does temperature affect the color of leaves?

The temperature of fall and its effect on leaves

As the nights get cooler in the northern hemisphere in September and October, we begin to see the trees change. If you’re lucky enough to live around a mixture of trees, you’ll begin to see bright red, orange, and yellow leaves appear.

Without as much daily sunlight, trees don’t go through as much photosynthesis. This is aprocess that produces sugars, which trees use as energy to grow and flower.

A reduction in photosynthesis leads to a reduction in chlorophyll as well, which is the pigment that makes leaves green. As they lose chlorophyll, they lose their green color and prepare to shed for the winter so trees can conserve their energy inside the branches and bark.

How does temperature affect the color of leaves?

But that still doesn’t explain the role of temperature.

The weather leading up to shorter days is actually quite important when it comes to determining how fall plays out for leaves .

We know that a reduction in chlorophyll leads to leaves being less green, but what makes some seasons produce more vibrant red leaves than others? Why does a tree turn bright orange one year and only a dull copper the next year?

Well, it turns out that the pigments that begin to show up once chlorophyll is reduced are dependent on both temperature and moisture conditions right before days start getting shorter. For example, some weather conditions make a leaf turn red early. It also helps it stay on the tree longer, so it goes through its full range of colors before falling off.

The role of weather in fall leaf displays

According to scientists at Michigan State (cited below), lots of warm days and cool nights narrow the veins in leaves. This helps trap the sugars made during photosynthesis in those leaves. When this happens, the sugars produce more vivid pigments.

“The most brilliant leaf displays follow a period of warm days filled with sunshine and cool nights. During this weather cycle, leaves produce an abundance of sugars during the sunny days. The cooler nights and gradual narrowing of leaf veins in the fall, means that a majority of the sugars produced are trapped in the leaf. An abundance of sugar and light in the leaf lead to the production of vivid anthocyanin pigments, which produce red, purple and crimson colors. Yellow and gold leaf colors are produced by carotenoid pigments, which are ever-present in the leaves and are therefore less dependent on the aforementioned conditions.”

Other factors in fall leaves

“Soil moisture also plays a role in the timing and brilliance of leaf color. The best displays are produced when the soil has been adequately moist throughout the year coupled with the aforementioned late summer weather. A late spring, or severe summer drought can delay the onset of color. A warm period during the fall can also decrease the intensity of fall colors by triggering early leaf drop before the colors have had a chance to develop.”

Finally, MSU explains that other factors can play a role in individual trees:

“Trees on the edge of low-lying areas, where cooler air collects at night, often display colors sooner than trees in an upland forested setting. Trees that are diseased or in decline may also display fall colors earlier than their healthy neighbors.“

And that’s why no two autumns will ever look the same. — WTF fun facts

Source: “How weather affects fall colors” — Michigan State University Extension

WTF Fun Fact 12976 – Rubber Bands Last Longer When Refrigerated

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Rubber bands aren’t expensive, but they can be important to have around. And making sure you don’t use them recklessly could help keep rubber out of landfills. But did you know that there’s an easy way to prolong the life of your rubber bands? Rubber bands last longer when refrigerated.

Why do rubber bands last longer when refrigerated?

The rubber used to make rubber bands is unlike most other materials. In many cases, materials do better in warmer or room temperature environments places that don’t stress the bonds hold them together. But that’s not the case for rubber bands.

Cold temperatures make the polymers in the rubber more relaxed. This prevents them from degrading or forming the dry rot that causes them to break just when you need them most.

According to JFlex (cited below): “When a rubber band is stretched it causes its polymer chains to become very ordered and it expels thermal energy (heat), thus shortening its life. This is increased further when placed in higher temperature environments which increases the oxidisation rate. Also, the natural rubber that is used to make rubber bands crystallises over time, giving us what is commonly called ‘dry-rot’ – which is where the bands get dry, crumble and no longer have any elasticity.”

Be careful when removing rubber bands from the fridge

Now, if you do decide to refrigerate your rubber bands, make sure not to stretch them right away.

“When a rubber band is in its relaxed state it is very unordered, and will cool when going from a structured state to a relaxed state. So when a rubber band is put in the refrigerator it makes the polymers even more relaxed due to the way they behave in the cold.

Something to be careful of is immediately stretching the rubber band after being in the fridge, as this will cause it to weaken significantly because of the rapid change of temperature state.”

Who knew? —WTF fun facts

Source: “Why do rubber bands last longer when refrigerated?” — JFlex

WTF Fun Fact 12974 – The Sex Lives of Constipated Scorpions

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The Ig Nobel Prizes have been awarded to 10 unusual (or unusually unuseful) scientific research projects each year since 1991. While it’s all in good fun, we couldn’t help but do a double-take this year at one of the winners – a team that published a study on the sex lives of constipated scorpions.

Constipated scorpions have it rough

Solimary García-Hernández and Glauco Machado of the University of São Paulo in Brazil won the 2022 Ig Nobel in biology for trying to discern whether being constipated affects a scorpion’s sex life. (To be fair, we can’t help but think being constipated is kind of a bummer for any creature.)

According to an Associated Press story on the prizes, “Scorpions can detach a body part to escape a predator — a process called autotomy. But when they lose their tails, they also lose the last portion of the digestive tract, which leads to constipation — and, eventually, death, they wrote in the journal Integrated Zoology.”

“The long-term decrease in the locomotor performance of autotomized males may impair mate searching,” they wrote.

Ok, maybe constipated humans don’t have it so bad after all.

Why even study this?

So, this particular study came about in an interesting way. The paper’s lead author Solimary García-Hernández had long been studying the scorpion species Ananteris balzani.

This species has an interesting characteristic – they shed their tails to help them escape a predator.

According to Smithsonian Magazine (cited below): “It was a big surprise in 2015 when she, while working as part of a larger research team, found that Ananteris scorpions are capable of shedding their tails. “Autotomy”—the process of dropping a body part to escape a predator—was until then known to have evolved in only a handful of animal lineages like starfish, spiders and certain lizards.”

Ok, so we totally understand wanting to look more closely into that interesting fact, especially since it turns out that when lizards shed their tails, it can impact their ability to walk but doesn’t kill them. However, scorpions are different.

When Ananteris scorpions shed their tails, their digestive tract backs up with feces, and they get swollen and die within around 8 months.

That’s weird since animals don’t typically adapt in a way that’s fatal to them unless it somehow helps their species. In this case, the extra months likely give them more time to reproduce. And that’s where studying their sex lives comes in.

The sex lives of constipated scorpions

García-Hernández decided to monitor the post-tail life of these scorpions to see how tail loss impacted their ability to reproduce.

“The team then set up a series of matings between stump-tailed and intact scorpions. García-Hernández predicted that autotomized male scorpions would be less successful at mating than their fully endowed counterparts, since the tail plays an important role in their complicated mating ritual.”

Male scorpions use their tails both to show off to mates and during intercourse, so not having a tail should make mating difficult. However, it turns out they just used their stump and were just fine.

It was a different story for females, however.

According to Smithsonian, “when the team explored the reproductive costs paid by stump-tailed females, the story was different. They found that tailless females, while able to mate successfully, went on to have 20 percent fewer offspring than intact females.

The reason for this difference? The five-month scorpion pregnancy provides a lot of time for females to get more and more constipated, says García-Hernández. She hypothesizes that the buildup of feces caused by the loss of the anus is either toxic to the embryos or that the feces simply crowds out the developing scorplings. This latter hypothesis is supported by the fact that a severely constipated scorpion can weigh 30 percent more than it did before it lost its tail. By comparison, that’s equivalent to a 150 pound person gaining 45 pounds of poop weight.” — WTF fun facts

Source: “For Constipated Scorpions, Females Suffer Reproductively. Males, Not So Much.” — Smithsonian Magazine

WTF Fun Fact 12972 – Lonnie Johnson and the Super Soaker

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The tale of NASA engineer Lonnie Johnson and the Super Soaker is one of intelligence, perseverance, and creativity. And who knew the iconic sibling-drencher was invented by accident?!

Lonnie Johnson’s story

Johnson was born in Mobile, Alabama in 1949 to parents who supported his ambitions to find out how things worked. Even as a kid, he played with rockets (and nearly burned down the house trying to make rocket fuel on the stove one day).

By the time he was in high school, he was trying to build his own robots. Despite going to a segregated school, he found ways to excel in the sciences and won a 1968 science fair for a robot created out of scrap metal. However, despite the attention that would have normally earned a young inventor, the University of Alabama showed no interest in admitting a Black student. So Johnson attended Tuskegee University, graduating in 1975 with a degree in mechanical engineering and a master’s in nuclear engineering on an ROTC scholarship.

After university, Johnson joined the Air Force, and during his service he received his first patent for a “Digital Distance Measuring Instrument.” According to Biography.com (cited below): “Simply put, it was an early version of DVD-reading technology, an innovation he later called “’he big fish that got away’ because he did not pursue it further.”

Lonnie Johnson’s accidental invention of the Super Soaker

In 1979, Johnson was recruited by NASA’s Jet Propulsion Laboratory. In addition to his illustrious career in engineering (he was part of NASA’s Galileo mission that sent an unmanned spacecraft to Jupiter), he’ll likely be remembered for an invention that was largely an accident.

One day he was experimenting with new ideas for a refrigeration system that could use water instead of freon (which is hazardous). He happened to be in the bathroom at the time and hooked up a nozzle to the bathroom sink, accidentally shooting water across the room.

That’s when he realized it would make a great water gun toy. But it would be years before that toy would make it to shelves because Johnson rejoined the Air Force to help build B-52 stealth bombers in Nebraska.

The birth of the Super Soaker

At night, Johnson would work on his water gun, giving the first prototype to his 7-year-old daughter, Aneka. She quickly became the hit of the Air Force base with her new toy and Johnson knew it would do well in stores.

He was originally quoted $200K for the manufacturing of the first 1000 toys, which was more than he could afford. That meant he had to find a partner.

Biography.com explains that it was a company called Larami that helped Johnson launch the Super Soaker: “Larami put the first line of the gun, then known as the Power Drencher, on shelves in 1990. It was an instant hit, and after it was redesigned and rebranded Super Soaker the next year, sales went through the roof, with more than two million units sold in the summer of 1991.” — WTF fun facts

Source: “How Lonnie Johnson Invented the Super Soaker: The engineer tuned toy inventor gamed up the idea for the water gun while preparing for a NASA mission” — Biography.com

WTF Fun Fact 12969 – Manatees Fart to Swim

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Do you know a kid who loves to share fun facts about animals and just won’t stop telling you everything you never wanted to know about lizards or sharks or bugs? Well, it’s time to blow their minds with your superior animal knowledge and show them adults reign supreme in the world of truly fun facts. Manatees fart to swim.

Do manatees really fart to swim?

We’re totally serious. We even looked it up on Snopes because it seemed too good to be true.

While manatees are aquatic animals, they aren’t like fish, which can live underwater but also have something called a “swim bladder” to control their buoyancy. Instead, manatees need to float – and if you live in the water but need to stay atop it, you have three choices – be built to sit upon it (like a duck), tread water like your life depends on it (like a human), or have a mechanism that makes your body buoyant.

And since the animals we lovingly call “sea cows” eat about 100 pounds of vegetation a day, let’s just say staying perched upon a wave isn’t really an option for them. That’s why manatees developed a different mechanism to stay afloat. Farts.

Fart like your life depends on it

At Captain Mike’s Swimming with the Manatees in Crystal, Florida (whose website we’ve cited below), you’ll get a great explanation of how the fart propulsion actually works.

According to the experts who swim with the flatulent sea cows all day, all the vegetation they eat creates the same reaction in their bodies as it does in ours. Farts. Gas. Flatulence. Whatever you want to call it.

“For manatees, there is always enough gas in the body…The gas produced during digestion is stored in intestinal pouches ready for use in swimming,” note the experts.

And how does that lead to the ability to swim?

“The gas produced during digestion is lighter than water. So when the animals hold in a substantial amount of gas in intestinal pouches, they lower their overall density and float in water. On the contrary, releasing the gas from the body makes a manatee relatively denser than water and to be able to readily sink. That is why manatees fart to swim. For they have to continuously hold in enough gas in their bodies to be able to come to the surface to breathe. Then soon after, they have to fart in order to release some gas, become less buoyant, and sink underwater.”

Hold your breath

Manatees can actually hold their breath for up to 20 minutes (don’t try that one at home!). But rather than use the breath trick, they can use farts with a lot less effort.

So next time you’re in the pool, you can see how this works (without the farts – don’t use the farts). Take a big, deep breath, hold it, and then float on your back. Then release the air (from your nose or mouth, please) and notice that you sink a bit.

Then you can tell everyone around you to be grateful that you’re not a manatee. Otherwise, they would have seen a lot of bubbles from your backside. — WTF fun facts

Source: “Do manatees fart to swim?” — Swimming with the Manatees