fun fact

WTF Fun Fact 12746 – Owls Don’t Have Eyeballs

Owls have eyes, of course. But owls don’t have eyeballs.

Instead, owls have eyes shaped like cylinders (with three eyelids!). Because of this shape, owls can’t roll their eyes around while keeping their heads still. That’s why they have to move their heads around too much to look around.

How do owls see without eyeballs?

According to the Office of Science & Society at McGill University: “Since moving their torsos would likely make noise that would alert their prey to their presence, owls have evolved to have necks that can spin up to 270° essentially silently.”

But why would an owl evolve to have eye rods instead of eyeballs? Wouldn’t it just be easier not to have to move your head at all in order to see to the side?

Well, perhaps, but the benefit of having eyes shaped like rods instead of balls is that not only does it allow them to see better in the dark but it’s the optimal shape for an animal with such a small skull.

The benefit of eye rods

As you may have noticed, nocturnal animals tend to have large corneas. That’s so any light can be collected more efficiently, allowing them to see in the dark.

As it turns out, these elongated eye tubes make it even easier for them to see the way they need to, even if they do have to make more movement in order to get a larger field of vision (also called binocular vision). Without moving their heads, their visual field is about 110 degrees (a human’s is 180 degrees, for comparison).

Binocular vision

Binocular vision also lets owls see objects in three dimensions (height, width, and depth). So, it turns out an owl’s eyes are pretty perfectly suited to its lifestyle.

While some believe all of this means that owls can’t see during the day because they’re blinded by too much light, that’s simply not true. Some owls can see even better than humans in the daylight as well, despite the lack of eyeballs.

At least you never have to worry about an owl giving you the side-eye. – WTF fun facts

Source: “Owls Don’t Have Eyeballs” — Office of Science & Society, McGill University

WTF Fun Fact 12743 – Laughter is the Best Medicine

We’ve always had lots of anecdotal evidence that “laughter is the best medicine” and studies have shown correlations between laughter and happiness and laughter and better life satisfaction. But in 2005, the first study showed some of the physiological effects laughter has on the body’s cardiovascular system.

So when you say “laughter is the best medicine” to someone and they roll their eyes, you can now hit them with some facts (unless you’re at a funeral or something, then wait a few weeks, please).

The first study

The results of the study were first presented at the Scientific Session of the American College of Cardiology, on March 7, 2005 by researchers from the University of Maryland. It kicked off a whole slew of studies backing up the evidence and providing yet more clues that you can laugh your way into old age.

But first, let’s see how this works. The first study used movies to look at the immediate effects of laughter on subjects’ endothelium – the tissue that forms the inner lining of blood vessels and that dilates or expands during blood flow. (And if it’s been a while since you’ve had a biology class, the better blood flows around your body – and to your heart – the more oxygen and other vital molecules get where they need to be.)

The approach

There were two groups of subjects – one watched a movie clip known to cause mental distress (for example, scenes from Saving Private Ryan – a great film, but not exactly a “cinematic joy ride,” aka it’s sad). The other group watched scenes from funny movies (one example was King Pin, which we have never seen, but we’ll trust that the researchers found a good clip).

Ok, so the goal was really just to make one group laugh and the other get kind of mired in sadness and then measure their blood flow. And you can probably see where this is going.

The results

The distressed group’s blood vessels showed an unhealthy physiological response of the blood vessels called vasoconstriction (a narrowing of the vessels that impedes blood flow). That had been suggested by many other studies before – when we’re stressed, our blood vessels constrict. Not good.

On the other hand, those who laughed showed great blood flow. That’s good. But it’s not just good in the moment, it’s good in the long term because the endothelium helps tone our blood vessels, adjust coagulation rates, and secretes chemicals that help heal wounds and respond to infections.

The researcher’s commentary

In an interview about the study, the lead investigator Michael Miller, M.D., director of preventive cardiology at the University of Maryland Medical Center said: “The endothelium is the first line in the development of atherosclerosis or hardening of the arteries, so, given the results of our study, it is conceivable that laughing may be important to maintain a healthy endothelium, and reduce the risk of cardiovascular disease. At the very least, laughter offsets the impact of mental stress, which is harmful to the endothelium.”

The impact of laughter was so strong that they compared it to the benefits one may get from exercise (thought warned against trying to replace exercise with laughter).

“The magnitude of change we saw in the endothelium is similar to the benefit we might see with aerobic activity, but without the aches, pains and muscle tension associated with exercise,” Miller said. “We don’t recommend that you laugh and not exercise, but we do recommend that you try to laugh on a regular basis. Thirty minutes of exercise three times a week, and 15 minutes of laughter on a daily basis is probably good for the vascular system.”

Further evidence

Since 2005, there have been many studies that show laughter is good for health, including:

  • A study of older Japanese people which found that those who laughed more had fewer heart attacks and stroked.
  • A 2020 study showing that overall mortality, as well as cardiovascular disease, were significantly higher among subjects with a low frequency of laughter.
  • A review essay noting that “many kinds of studies, using different methods, conclude that happiness has a positive causal effect on longevity and physiological health.”

So, ask your doctor today about what a funny movie or a night out with fun friends can do for you. And if they look at you funny, just tell them you read that laughter is the best medicine on the internet. They love hearing that. – WTF fun facts

Source: “Laughter Helps Blood Vessels Function Better” — Science Daily

WTF Fun Fact 12741 – The Force of Teeth Grinding in Humans

Have you ever woken up feeling like someone punched you in the jaw? Or how about with unexplained headaches or even a loose tooth? You might be grinding your teeth.

Well, first, make sure your partner isn’t exhibiting some REM behavior disorder that makes them flail wildly in their sleep. If not, you might want to ask your dentist about bruxism because it can wreak havoc on more than just your teeth.

Bruxism

We all clench our teeth sometimes (like when we’re tense, for example, and it can even be subconscious). While this doesn’t typically do much harm, habitual teeth grinding can affect your jaw and all the muscles around it, leading to neck and head pain and dental issues.

Bruxism, as the teeth grinding condition is called, can also lead to facial changes (it can even change your facial profile) as you lose, chip, or wear down teeth. It can even cause your cheekbones to drop, making your face look droopy and prematurely aged.

Why we grind

According to The Cleveland Clinic, “Men and women get bruxism at roughly the same rate. If you have a family history of teeth grinding, you may face a higher risk. Other risk factors include:

  • Personality type, as people who are very driven may be more prone to teeth grinding.
  • Stress.
  • Cigarette smoking and caffeine use.
  • Certain anti-anxiety medications.”

As you might imagine, bruxism also affects getting a good night’s sleep. So if nothing else, it’s useful to solve the problem so sleep issues don’t cause other problems in your life.

Young children can have bruxism too, and the way they grind teeth it can be caused by anything from allergies to genetics. Often, they outgrow it as their jaws change.

Treatment usually consists of a nightguard, but if you habitually grind your teeth while awake, you may need to train yourself to stop and notice the habit and practice some stress relief techniques.

Two hundred and fifty pounds is a lot of force for a human jaw (most of the time, our molars have about 70 pounds of force, and a strong jaw tops out at about 160 if you’re really trying).

According to the New York Times, “By way of comparison, a well-publicized 1996 study of the tyrannosaurus, done at Stanford, estimated its bite strength ranged from 1,440 to 3,011 pounds, noting that this was fairly close to the power of an alligator’s jaws.”

Now just imagine being a T-rex with bruxism! Ouch. – WTF fun facts

Source: “Bruxism (Teeth Grinding)” — The Cleveland Clinic

WTF Fun Fact 12740 – The Master Switch of Life

The Master Switch of Life is a phrase coined by Swedish researcher Per Scholander in the 1960s.

His research took place in the U.S. the United States where he studied just how being underwater would affect humans. He had already studied Weddell seals and found that the creatures seemed to gain more oxygen the longer they were underwater.

The water tank trials

To see if the effect might be the same in humans, he put volunteers in a water tank and monitored their heart rates as they dove to the bottom of the tank. Immediately, the volunteers’ heart rates decreased.

Then he asked them to do some exercise at the bottom of the tank to try and raise their heart rates but to no avail. Being underwater continued to lower everyone’s heart rate, meaning they also needed less oxygen (the opposite of what happens on land when we exercise). In addition, when the volunteers were underwater, their blood began flowing away from limbs and towards vital organs (which also happens in seals).

When blood flows to the heart and brain, they stay oxygenated longer, meaning we need less overall oxygen for our bodies to continue to function.

The mystery of water

That’s when he wondered why water has such an unexpected effect on us.

It turns out that the more we dive, the more blood can penetrate the cell walls of our organs to counteract external pressure.

And here’s the really cool part, according to TED:

“Scholander found that a person need submerge only his face in water to activate these life-lengthening (and lifesaving) reflexes. Other researchers tried sticking a hand or a leg in the water in an attempt to trigger the reflex, but to no avail. One researcher even put volunteers into a compression chamber to see if pressure alone would trigger a similar diving reflex. No dice. Only water could trigger these reflexes, and the water had to be cooler than the surrounding air.”

A splash of cold water

All we need to do is splash some cold water on our faces to flip what he called this “Master Switch of Life.” Cool water basically makes us more amphibious and produces a physical change in our heart rates. That certainly explains why cold water feels so refreshing!

– WTF fun facts

Source: “Your body’s amazing reaction to water” — TED Ideas

WTF Fun Fact 12739 – The Dreams of Men

Multiple studies have shown tend to have more male characters in their dreams.

We have very little control over what we dream about, even though many of us try to direct our dreams. (I know I do – if I could spend all night dreaming about being a wealthy villa owner on an abandoned tropical coast instead of reliving a made-up scenario about missing a vital exam and never graduating high school, I would!)

Studying dreams

Anyway, there are hundreds of studies on dreams. Most of them involve having people use dream journals where they write down the contents of their dreams any time they awaken. The journals are then processed by a researchers who looks for certain characteristics without knowing anything about the person the journals belong to (that’s why they’re called a “blind judge” in many research papers).

Researchers usually start with common themes and types of characters and count mentions of them. And a lot of the research has backed up the data we’ve collected over time. (However, there are some differences between cultures as to what we dream about.)

Demhoff’s dream research

For example, G. William Domhoff wrote one of the most widely-cited papers on the genders we dream about (nearly two decades ago, before talking about more than two genders was a cultural priority). It’s called “The Dreams of Men and Women: Patterns of Gender Similarity and Difference,” and it was published in 2005.

In the paper, Domhoff is very clear that “The study of gender similarities and differences in dream content has proven to be a dangerous mine field for dream researchers.” That’s because this kind of information has the “potential to stir up all the tensions that inevitably accompany any discussion of gender in a world where gender discrimination–and conflicts between men and women on many personal issues–are pervasive.”

Limited interpretations

In other words, it’s likely that a large number of people will dislike this “fun fact” because they somehow feel judged by it or don’t like whatever they think it implies (which is largely nothing).

Demhoff was also careful to not that variations across cultures and across genders make generalizations difficult. He’s just reporting on one characteristic that he found to be statistically significant – the gender of the characters in people’s dreams.

Demhoff concentrated on American subjects since he was most familiar with the cultural characteristics of Americans. But other researchers have studied other cultures and found some key differences.

To make sure everyone is categorizing things in a roughly similar way, Demhoff used a coding system developed in 1966 called the Hall/Van de Castle system, where most things fall into pretty simple categories like: men/women; indoor setting/outdoor setting, etc. But that system was created based on the dream journals of white, middle-class college students at Case Western in the 1950s and 60s. In general, other studies have found these categories useful too.

So, on to the results (because results don’t mean much without some context first!).

What men dream of

Demhoff asked what percentage of dreams had a negative element “such as aggressions, misfortunes, failures, and negative emotions (anger, apprehension, confusion, and sadness)…” And the results were that “men and women are similar in that 80% of men’s dreams and 77% of women’s have at least one of these negative elements.”

When it comes to positive aspects, “such as friendly interactions, good fortune, success, and happiness, 53% of dreams for both men and women have at least one of those elements. Men and women also have an equal number of dreams in which food or eating is mentioned–about 17%.”

In addition, “Both men and women are more often victims than aggressors in the aggressive interactions in their dreams, and they face the same attackers, namely, men who are not known to them (“male strangers”) and animals. On a more positive note, both men and women are equally likely to befriend another character in their dreams.”

But we started with the most reported-on finding, which is that “men dream twice as often about other men as they do about women (67% vs. 33%), and women dream equally about both sexes (48% men, 52% women).”

What’s implied by the dreams of men? Not much

And here’s where people get offended. No one is implying that men fantasize about other men. They can be someone you fight on the street, your 5th grade math teacher, your dad…whatever.

Women may also have more of a character gender balance because their dreams tend to have more characters overall. This may be a result of women’s dreams being longer overall than men’s.

But Demhoff points out that this in not universal. Even among Black Americans, men and women tended to have an equal gender breakdown in dreams. Studies of Mexican and Peruvian teens as well as German college students also showed more of a gender balance. However, in each case there were slightly more men than women in everyone’s dreams.

– WTF fun facts

Source: “The Dreams of Men and Women: Patterns of Gender Similarity and Difference” — G. William Domhoff

WTF Fun Fact 12734 – Man Wins Horse Race

For only the third time since 1980, a human has won the annual Man vs. Horse race. Ricky Lightfoot beat 50 horses (and 1000 other human runners) finishing the 22.5-mile course in 2 hours, 22 minutes, and 23 seconds. He won about $4200 for his efforts – as well as bragging rights amongst friends and foals alike.

IFL Science humorously recounted the beginning of the Man vs. Horse race:

“The idea for the race came, as you might expect, from a drunken argument in a pub. Landlord of the Neuadd Arms in Llanwrtyd Wells, Wales, overheard two customers arguing (as you do) over the benefits of people vs the benefits of horses. 

After a few more pints, as was inevitable, one of the men proclaimed that over a long distance people could equal the performance of any horse. Not satisfied with mere speculation, the landlord – Gordon Green – decided that there should be a public competition where this slurred theory could be tested. Every year since then – bar a few years where the event was canceled due to the pandemic – people have raced against horses in a constant battle for supremacy.”

Even more striking is the BBC report that “The winner of the grueling Man v Horse race has revealed he had been awake for 29 hours before the event after flying from Tenerife to claim victory…Landing at 04:00 he travelled to Wales, arriving at Llanwrtyd Wells, Powys, at 09:00 for the race start at 11:00. Crossing the line, the 6ft 4in athlete had no idea whether he had won as the people and animals take slightly different routes.”

The 37-year-old firefighter and father of 2 beat the first horse by over 2 minutes. So much for horsepower.

Apparently, Lightfoot’s family couldn’t believe he managed to win the race.

“I called my partner and said: ‘I beat the horse’. And she said: ‘You’re joking?’.
“And I said: ‘No, I did.’ She was like, ‘oh my God!'” he told BBC News.

Prior to the race, Lightfoot said he didn’t have much experience around horses.

“I’ve never rode a horse in my life. I once rode a donkey at Blackpool Pleasure Beach though,” he told the BBC.

After winning, Lightfoot headed right back home to Cumbria to report to work at 7:30 am the next day. – WTF fun facts

Source: “Man v horse: Powys race won by runner Ricky Lightfoot” — BBC News

WTF Fun Fact 12733 – The PAWSCARS

Each year, American Humane puts on its own award show to celebrate the “furry, winged, and scaled” members of television and film casts. It’s called the PAWSCARS™, and it celebrates animal actors past and present.

American Humane has long played a role in ensuring the health and safety of animals on entertainment sets. According to their website:

“Since 1877, American Humane has been at the forefront of every major advance in protecting animals from abuse and neglect. Today we’re also leading the way in understanding human-animal interaction and its role in society. American Humane advocates for the American values of caring, compassion and hope. Our programs enrich our communities, prevent abuse of animals, and embrace the power of the human-animal bond. American Humane works in association with the American film and TV industry to help ensure the well-being of animal actors and promote the human-animal bond. They are on the set to protect animal actors. American Humane also celebrates the achievements of extraordinary dogs across the country with its annual American Humane Hero Dog Awards™. In addition, the organization enlists and works with many celebrities who speak on behalf of the voiceless that American Humane aims to protect.”

Their Hollywood initiative also includes the annual award show, which we really think should be televised since we would totally watch that (and we’re sure other animal lovers would too!).

Interestingly, the ASPCA also has Pawscers Awards, but these go to adoptable animals throughout the country, not to animal actors.

American Humane’s PAWSCER awards got the most press in 2016, when fans voted on their all-time favorite animal movies. The winners included

Favorite Animal Buddy Movie of All Time: “Turner and Hooch”

Favorite Animal Drama of All Time: “Seabiscuit”

Favorite Animal Family Movie of All Time: “Old Yeller”

Frankly, we want to know what people were thinking when they chose Old Yeller, which has a pretty devastating ending and scarred generations of children. But to each their own – the people have spoken.

American Humane’s explanation was that “Disney’s timeless classic from 1957 is credited as one of the first films to demonstrate the importance of the human-animal bond, the inextricable link between people, pets and the world we share.”

Overall, the PAWSCERS are designed to honor “some of America’s most treasured institutions.” And while we haven’t heard much about the awards in the last few years, we think it’s time to add more animal award shows to the television line up!

– WTF fun facts

Source: “Pawscers Awards” – The American Humane Society

WTF Fun Fact 12732 – Everyone Thinks Archimedes Created A Death Ray

There’s a great New York Times article from 2003 that begins with the line “For the last time: Archimedes did not invent a death ray.”

Of course, it disappointed a lot of people. The reason someone had to say it was that the obsession with this particular invention had to be debunked so many times that even President Obama got involved and called on Mythbusters (who debunked it a third and final time on their show alone). Alas, people still believe it existed (presumably just because they think it sounds really cool and don’t care much for evidence).

Archimedes did invent a number of very wacky weapons though – we just have little to no evidence that most of them were ever used. Take the “claw of Archimedes,” for example. The ancient Greek inventor did come up with an idea to build a giant claw that would work like a crane to reach out into the sea and “grab” enemy ships to destroy them.

But while there are ancient accounts describing it (and even Wikipedia and some engineers and a handful of ancient historians might have you believe it was used), there isn’t so much as a single drawing or scrap of wood that would prove it was ever really built. There are, however, written accounts. It’s just that no one can be sure they aren’t recalling tall tales told during times of jubilant victory. But, hey, maybe underwater archaeologists will find one. It’s not entirely impossible.

So, about this death ray. The invention was basically a series of mirrors that would use the sun to point a ray of searing sunlight at enemy ships in order to incinerate and sink them as they launched an amphibious assault. It would work a bit like using a magnifying glass to burn an ant but on a very large level. We’ll admit, it does sound cool, but again, there would be a lot of evidence if someone had managed to construct something like that.

If you want to know why people remain obsessed with the “death ray” (which is not a name Archimedes used), blame some 12th-century historians and MIT students.

However, according to Sciencing: “Twelfth-century historians John Tzetzes and John Zonares credit Archimedes with using a system of mirrors to direct the heat of the sun at Roman ships, setting them ablaze. Zonares goes so far as to claim that Archimedes destroyed the Roman fleet this way. Many modern historians and scientists consider these claims dubious. However, a team of Massachusetts Institute of Technology engineering students were successful in replicating the feat of setting a ship ablaze using only mirrors in a 2005 set test, lending plausibility to the legend that Archimedes invented a death ray using mirrors.”

Aspiring historian Spencer McDaniel has also convincingly debunked the myth using writing sources, noting that: “The Greek historian Polybios of Megalopolis (lived c. 200 – c. 118 BC), the Roman historian Titus Livius (lived 64 or 59 BC – AD 12 or 17), and the Greek biographer Ploutarchos of Chaironeia (lived c. 46 – c. 120 AD) all give detailed accounts of the Roman siege of Syracuse and not one of them ever mentions anything about Archimedes having built a death ray to defend the city.”

Only people writing 400 years after Archimedes’ death started writing about a “death ray.” Sorry. – WTF fun facts

Source: “Archimedes’s Death Ray” Debunked” — Tales of Times Forgotten

WTF Fun Fact 12731 – Cute Aggression

Have you ever seen a chubby baby face or a fluffy bunny and thought about snuggling it to pieces? It’s called “cute aggression,” and it isn’t typically as violent as it sounds.

According to Forbes, “cute aggression” was first described by Yale researchers in 2015. It’s “actually pretty common and can encompass behaviors such as wanting to bite, nibble, squeeze, or smoosh the face of something extremely adorable.” In addition, “studies have long shown that people who view photos of tiny, adorable things often react with extremely aggressive language.”

Don’t worry – no one gets hurt

The good news is that no matter how many times we say “I just want to smush her cheeks” or “I want to cuddle that kitten SO HARD,” those words don’t actually translate into action. For the most part, we lay off the smushing and potentially painful cuddles. (Of course, toddlers and cats may not agree – they always act like a snuggle is about to kill them.)

Research into “cute aggression” was done by Katherine Stavropoulos, an assistant professor at the University of California, Riverside. She’s also a licensed clinical psychologist and neuroscientist. Stavropoulos looked at the brain’s electrical activity as subjects viewed images of really cute creatures. She published the findings in an article titled “‘It’s so Cute I Could Crush It!’: Understanding Neural Mechanisms of Cute Aggression,” in Frontiers in Behavioral Neuroscience.

Forbes states that “the new study backs up the hypothesis that these feelings may serve as a mechanism to prevent people from being overwhelmed (and thus incapacitated) by cute things. It’s basically what happens to your brain when you just can’t even.”

“Cute aggression” is all in your head

In other words, the electrical activity in our brains showed that we have a physiological reaction to cuteness. And it can be A LOT. In order to make sure we don’t actually smother baby animals (which were deemed to be the cutest things overall, producing the biggest neurological response), we use “violent” language to talk about snuggling things really hard.

That’s just how our brains respond to a cuteness overload.

Forbes also revealed that “Journalists have noted that this phenomenon is universal and that most languages have a word for this type of feeling – the Filipino language Tagalog, for example, has a word Gigil, which means gritting your teeth and trembling in an overwhelming situation.” In addition “Other studies have shown that cuteness aggression is felt far more acutely when people can’t physically touch the cute thing they’re seeing.”

That would help explain all the squealing when we see cute animal videos online. – WTF fun facts

Source: “The Science Behind Why You Want To Destroy Something Beautiful” — Forbes