Science

WTF Fun Fact 13066 – Video Games and Surgeons

Surgeons who play video games for at least a few hours a week make fewer errors during surgery. This specifically relates to non-invasive and very precise laparoscopic surgery.

Surgeons who play video games

In an article titled The Impact of Video Games on Training Surgeons in the 21st Century (cited below), researchers from Beth Israel Medical Center, New York University Medical Center, Montefiore Medical Center, Brookdale University Hospital and Medical Center, Iowa State University, and Virginia Commonwealth University found that video games are correlated with better surgical outcomes.

According to the authors:

“Past video game play in excess of 3 h/wk correlated with 37% fewer errors…and 27% faster completion…Current video game players made 32% fewer errors…performed 24% faster…and scored 26% better overall…than their nonplaying colleagues…Regression analysis also indicated that video game skill and past video game experience are significant predictors of demonstrated laparoscopic skills.”

Videos games for surgical success

The researchers set out to measure the relationship between “laparoscopic skills and suturing capability, video game scores, and video game experience.”

Because they found a correlation between video game skills and positive laparoscopic surgical skills, the researchers suggest that medical training curricula might video games in the future. But this applied to surgery that didn’t require a large incision. Instead, laparoscopic surgery uses a small incision or hole and is largely computer-guided. It’s a more popular kind of surgery because there are typically fewer risks involved for the patient and less down-time.

While the authors acknowledged the drawbacks of playing video games excessively (such as poor grades and possible heightened aggressiveness), they also highlighted the benefits.

More specifically:

“Disturbing negative correlations with video game play include lower grades in school; aggressive thoughts, emotions, and actions (including physical fights); and decreasing positive prosocial behaviors. Excessive game playing has also been linked to childhood obesity, muscular and skeletal disorders, and even epileptic seizures. Other physical findings have included increases in blood pressure, heart rate, and stress hormones (norepinephrine and epinephrine)… However, positive benefits of video game play include increased performance on eye-hand coordination tasks and neuropsychological tests and better reaction time, spatial visualization, and mental rotation.”

The benefits of gaming

The authors cited other studies that found correlations between playing video games and the ability of gamers to process visual information, improve their spacial awareness skills, and develop better visual attention processing.

These are all crucial skills for surgeons. — WTF fun facts

Source: “The Impact of Video Games on Training Surgeons in the 21st Century” — JAMA Surgery

WTF Fun Fact 13065 – World’s Largest Diamond Mine

The Popigai crater, located in Siberia, is estimated to be the world’s largest diamond mine. It may contain trillions of carats of diamonds. Previously, the Russian government has claimed that, if mined, the diamonds could tank the entire worldwide diamond market. But there’s a catch.

Is Popigai crater the world’s largest diamond mine?

There are a few things we know for sure about Popigai. First, it’s one of the largest (the 4th largest, to be exact) and most well-preserved asteroid impact craters on the planet. It’s located in northern Siberia and is roughly 60 miles in diameter.

According to NASA, “The crater sits on the northeastern margin of the Anabar shield, which contains a mix of graphite-bearing rocks and sedimentary rocks. The impact from the asteroid melted 1,750 cubic kilometers (420 cubic miles) of rocks and instantly transformed the flakes of graphite into diamonds. Diamonds formed in a hemispherical shell about 1.6 kilometers (a mile) thick and about 12 to 13 kilometers away from the impact site. Scientists estimate that diamonds did not form at the impact site because the collision’s heat and pressure were likely too great to survive there.”

The Russians have claimed for decades that the crater contains “trillions of carats” of diamonds. But it’s been largely left unexplored.

Not your average diamonds

Because the diamonds in the Popigai crater are impact diamonds, they didn’t form the same way as gemstones. That means they’re of no use to the jewelry industry.

While they range in size, most are smaller than 2 millimeters. But more importantly, they aren’t pure.

While they hold great value for industrial uses, Russia has left Popigai largely unmined because they have the means to produce synthetic diamonds for industrial purposes without going through the trouble of mining at such a large scale.

First discovered in the 1970s under the Soviet regime, the diamond mind made world news in 2012. At the time, the Russians claimed the crater held enough diamonds to supply the international diamond market for 3000 years. But, again, that would be for industrial diamonds.

Russia already has a series of diamond mines. Right now, it appears the cost of mining the diamonds so far does not outweigh their value – at least to Russia. Others have speculated that mining the diamonds could lead to an enormous technological revolution. — WTF fun facts

Source: “Popigai: Russia’s Crater of Diamonds – Estimated To Contain ‘Trillions of Carats'” — SciTechDaily

WTF Fun Fact 13053 – The Mere Exposure Effect

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

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

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

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

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

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

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