Nature

WTF Fun Fact 13156 – Fish Cough

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Fish can cough. But they don’t sneeze. Pretty riveting stuff, right?

Well, it turns out it is pretty interesting.

How do fish cough?

While a fish can cough, it doesn’t make a sound when it does. As the experts at Fluffy Planet explain:

“Every now and then, a fish uses its gills to extract a little amount of oxygen you find in the water. Then, it releases gases like carbon dioxide. During this process, it is possible for particles or bacteria to get sucked in through the gills. Similar to how bacteria and particles are sucked into our mouth while we are breathing.

To clear the bacteria and particles, our body will either instinctively cough, or you could be prompted to cough on your own to clear out these particles. So, when these particles go into a fish’s gills, their ventilation cycle is interrupted with a cough.”

The coughs happen when the fish’s ventilation cycle is interrupted as they need to clear out their gills.

But while fish can cough, they can’t sneeze. And they don’t cry. It’s simply not biologically possible.

Why can’t fish sneeze?

We use our throats to cough, and it’s an action that clears us out. But sneezing requires air to be expelled involuntarily in response to an irritant. Sneezes expel air from the lungs at great speed. And since fish live underwater, they don’t breathe air (and don’t have a version of lungs like ours). If they did, they would float when their lungs will with air.

Now, you probably know fish don’t cry (they can’t really produce tears underwater), but you might find an article from theNew York Times interesting. It explains that researchers think fish can get depressed. When they do, they exhibit similar behavior to humans, such as isolating themselves. —WTF fun facts

Source: “Do fish cough, sneeze, or cry?” — Fluffy Planet

WTF Fun Fact 13149 – Spiders Recycle Their Webs

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Not all spider webs are destroyed with a broom. In fact, spiders can recycle their webs by eating them!

How and why do spiders recycle their webs?

Some spider webs are built to last years while others only last a day or so. Of course, while those beautifully spun webs in the corner of your attic may have been built as a long-term home for the spider, in that case, their duration is influenced by how long humans allow them to stick around.

But for some neglected spider webs, they can be so enduring that a new generation of spiders might come to reside there.

More fragile webs may only last a day because spiders build them simply to catch food. Rain and pollen may affect their stickiness. In these cases, spiders will pack up a web for the day and build again the next. When this happens, spiders often eat their webs to recycle the amino acids that made up the silk protein used in web construction.

It’s an impressive feat since webs can consist of 65 feet of silk!

Not all spiders ingest their silk though. And some use it to wrap their eggs sacs. But considering how much energy it takes to weave a web, it’s not all that surprising that spiders recycle webs by eating them in some cases.

Spider web building

Spider web silk is made out of protein chains. And some of it is as strong as kevlar (though obviously it’s not as tightly woven, so we hardly notice when batting them away). In fact, scientists are studying it in the hopes of making future body armor!

Spiders typically start building webs by pulling silk from a gland in their fourth leg. The fourth leg on the opposite side contains even more silk glands. Then, in order to begin, the spider (depending on the species) can shoot it out to attach to an object or wait for a breeze to carry it to the base from which it will start building.

From there, the spider will typically create a number of attachment lines. Then they decide which are the strongest and begin weaving from there. Different spiders have different web patterns. In fact, they’re so distinct that experts can look at the structure of a web and tell you precisely which type of spider built it.

—WTF fun facts

Source: “Why do spiders eat their own webs?” — Discover Wildlife

WTF Fun Fact 13143 – Grass Screams When Cut

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You’ll never cut your grass again without thinking of this weird fact – grass cries for help when it’s mowed. No, you can’t hear it, but scientists have discovered grass screams when cut.

How does grass scream when cut?

We’re only just beginning to understand how plants communicate with one another and the rest of the world around them (including insects).

Dr. Michael Kolomiets, a Texas A&M AgriLife Research plant pathologist, published an article in 2014 in The Plant Journal noting that the aroma of cut grass is the plant’s way of both signaling distress and attracting beneficial insects that will help it heal.

According to ScienceDaily (cited below): “When there is need for protection, the plant signals the environment via the emission of volatile organic compounds, which are recognized as a feeding queue for parasitic wasps to come to the plant that is being eaten and lay eggs in the pest insect,” Kolomiets said.

Plant communication

Grass produces a “defensive” protein when damaged. Of course, that doesn’t stop the lawnmower or insects from destroying the blades. But it appears to produce a compound that repels insects that are feeding on the damaged grass.

This compound, or one related to it, also appears to attract organisms like parasitic wasps that feed on insects like caterpillars that are destroying the grass.

Or to put it in science-speak:

“We have proven that when you delete these volatiles, parasitic wasps are no longer attracted to that plant,even when an insect chews on the leaf. So this volatile is required to attract parasitoids. We have provided genetic evidence that green leafy volatiles have this dual function — in the plant they activate production of insecticidal compounds, but also they have indirect defense capability because they send an SOS-type signal that results in attraction of parasitic wasps.”

So, maybe it’s not so much that grass screams when cut so much as it cries for help. Either way, freshly cut grass emits a compound that repels damaging insects and attracts insects with a protective function.

It’s just one of the many ways that plants are far more complex than we had ever previously imagined. — WTF fun facts

Source: “Mown grass smell sends SOS for help in resisting insect attacks” — ScienceDaily

WTF Fun Fact 13136 – Snow in the Desert

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In 2011, Chile’s Atacama Desert in Chile got a rare snowfall. In fact, it received 32 inches of snow as the result of a very rare cold front from Antarctica. This wasn’t the only instance of snow in the desert, but it’s interesting and bizarre since the Atacama Desert is one of the driest places on Earth.

What caused snow in the desert?

According to the Washington Post (cited below), “The uniqueness of this event is that the Atacama Desert is a 600-mile-long plateau known to be one of, if not the driest and most sterile deserts on Earth. Because moisture is blocked from the east by the Andes mountains and from the west by the Chilean Coast Range, the average rainfall is just 0.04 per year and skies are almost always cloud-free.”

The 2011 snowfall occurred when an Antarctic cold front (the strongest in 30 years) broke through the region’s rain and snow shadow. It is wildly cold there (with an elevation of 10,000 feet), but it just doesn’t typically get moisture).

Other parts of Chile got a crippling 8 feet of snow, cutting off access to the area and stranding residents without supplies. The Washington Post quoted one regional governor as saying, “In four days we have had four months’ worth of snowfall.”

It’s so dry in this desert that Atacama’s weather stations had never even recorded rain, and “research suggests that some identifiable river beds have been dry for 120,000 years.”

What’s special about the Atacama Desert?

If you’ve heard of the Atacama desert, it might be related to any interest you have in NASA and space exploration. The desert is used to simulate Mars, and NASA uses it to test Mars mission instruments.

It’s also been a movie set because it simply doesn’t look like Earth. For example, it was used in Space Odyssey. —WTF fun facts

Source: “Rare snowfall on Earth’s driest desert in Chile” — Washington Post

WTF Fun Fact 13135 – The Blizzard of 77

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Have you heard the lore of the Blizzard of 77? Maybe you even lived through it. If so (and you’re like my family), no other storm could ever be like it again. (Meanwhile, we played a board game called The Blizzard of ’77 with glee as kids.) So what happened, exactly, during that storm?

There’s no need to make light of this storm – it was deadly and heartbreaking to many families. At least 23 people died as a direct result of the blizzard. That’s part of the reason it holds such a solid place in the memories of those who felt it.

The Blizzard of ’77 hit Western New York and Southern Ontario at the end of January. The snowfall during the storm was minimal, but the winds blowing off the frozen Lake Erie blew around the 60 inches of snow already on the ground to create snowdrifts.

Where did the blizzard happen and how bad was it, really?

The Blizzard of 77 happened around the Great Lakes in the U.S., and more specifically the western side of Lake Erie. Western New York and Southern Ontario felt the brunt of its wrath. But most people associate the city of Buffalo, NY with the notorious blizzard.

If you dislike snow (or even if you do like it, just not when it’s in your driveway/on your car), you know even 4 or 5 inches can be enough to wreck your day. But the blizzard brought 100 inches to some places in Western New York. Just not from the sky. More on that in a minute.

Some stories that came out of the event are endearing, others tragic.

Kids gleefully climbed snowbanks to stand on the roof of their houses (back in a time when parents would still kick you outside during the day). Many parents regretted the roof damage that was wrought, especially since if you were going to climb the roof, chances we you were taking the top of the trash can to use as a sled.

Two reindeer at the Buffalo Zoo decided to prance out onto the huge snowdrifts. They waltzed out of their pens and the zoo itself. Maybe they thought they had finally made it home.

On the other hand, nine people were found buried in their cars. Others had heart attacks while trying to shovel the snow. Car accidents took even more lives (there was a travel ban, but not all workers got a day off). The storm cost the area economic losses in the neighborhood of $221 million. That includes $36 million in lost wages for city residents.

Buffalo became known as the city of snow mostly because of the images people saw on the nightly news.

Buffalo’s notorious blizzard of 77

Buffalo made the news around the world because of the photos that resulted from the storm. Of course, most people had to wait to see the photos because you still had to take your film to be developed at the store. And there were no cell phones to check on your family.

People were stuck on roads for hours (which is terribly dangerous if snow covers your tailpipe because you may end up dying from carbon monoxide poisoning, as some do during these types of storms). Babies were delivered at home because emergency vehicles could not get down the streets. The power went out in homes across the area. Families huddled together for warmth (no matter how mad you were at your siblings).

Buffalo and their “southtowns” (like Hamburg and Orchard Park) often get loads of lake-effect snow early in the year. This can be annoying and plentiful, and this snow is the result of the lake not yet being frozen and adding more moisture to the air.

However, during Buffalo’s Blizzard of ’77, the lake had frozen. And that was even worse because it helped the snowdrifts blow across areas where shoveling and plowing could be undone in a matter of minutes with the right (or wrong) gust of wind.

Prior to the first day of the blizzard, it had snowed just about every day since Christmas, so Mother Nature had a lot of ammo to work with. Buffalo had 33-59 inches of snow (depending on where you were) already on the ground before the blizzard even began. That made the snow even harder to move because it was densely packed. Construction equipment wasn’t enough to move some of it. There was no place to put the snow after a few hours.

The Blizzard was a regional event and not the worst blizzard

The Blizzard of 77 in Buffalo was one of the first to be broadcast around the world. This made it memorable to people well outside the region. And other regions got walloped as well.

The Blizzard of 78 was actually worse in some ways. 100 fatalities were recorded, and that nor’easter spread out farther. It affected New England, New Jersey, Pennsylvania, and New York. Plenty of people felt it in the Midwest as well!).

Part of what made the Blizzard of 77 so memorable is the help that came from around the country in its aftermath. The National Guard set up a post in the city of Buffalo. Equipment came from as far as Colorado to help with the clean-up.

Only around 12 inches of new snow fell during the blizzard itself. But the winds of nearly 70 mph were enough to maim and kill. So were the Arctic temperatures (the wind chill made it feel like −60 °F).

Extreme weather is a fact of life, but some events stand out in people’s memories more than others. The Blizzard of 77 is one of them. — WTF fun facts

Source: “On this day 45 years ago, the Blizzard of ’77 struck – stories from the storm” — WIVB

WTF Fun Fact 13119 – Greenland’s Ecosystem Surprise

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Evidence from the oldest DNA ever analyzed indicates that northern Greenland used to be a lush wonderland where mastodons, reindeer, geese, and hares once lived among a wide array of trees and other greenery. Greenland’s ecosystem surprise was reported in the journal Science in December 2022.

Why is ancient Greenland’s ecosystem such a surprise?

Today, Greenland’s ecosystem is far less varied thanks to its extreme Arctic climate. While you will find moss, lichen, small trees, and bushes in the tundra, it’s still largely considered an Arctic desert.

According to Eske Willerslev, a paleogeneticist at the University of Cambridge and a co-author of the study,

“No one would have predicted an ecosystem like this. Some species you find further south in Greenland, but a number you don’t find in the Arctic at all. It’s an ecosystem with no analog in the present day.”

Ancient DNA

According to Science (cited below), the insights into Greenland’s ancient past “come from the oldest DNA ever recovered: 2-million-year-old snippets of genetic material from more than 100 kinds of animals and plants, extracted from buried sediments.”

So not only is the information about Greenland’s ecosystem special, but the ability to use short and partially decayed DNA from millions of years ago is an exciting development.

According to Smithsonian Magazine, “Beyond evidence of reindeer, geese and one mastodon, [the researchers] also found signs of marine species, including horseshoe crabs and green algae. In this era of the island’s geologic history, temperatures were around 18 to 31 degrees Fahrenheit warmer than they are in Greenland today.”

Needless to say, scientists are excited about the finds.

“I wouldn’t have, in a million years, expected to find mastodons in northern Greenland,” said Love Dalen, a paleogeneticist at Stockholm University in Sweden.

“It feels almost magical to be able to infer such a complete picture of an ancient ecosystem from tiny fragments of preserved DNA,” said Beth Shapiro, an evolutionary biologist at the University of California, Santa Cruz. — WTF fun facts

Source: “Lost world in northern Greenland conjured from DNA in ancient soil” — Science

WTF Fun Fact 13116 – Pigeons Can Tell the Difference Between Monet and Picasso

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If you try hard enough, anything is possible. But it turns out training pigeons to discriminate between a Picasso and a Monet isn’t actually all that hard. Pigeons can tell the difference between the two artists with relatively little effort (at least relative to what we would have imagined).

Pigeons and Picasso and Monet

In 1995, researchers Shigeru Watanabe, Junko Sakamoto, and Masumi Wakita published a paper called “Pigeons’ discrimination of paintings by Monet and Picasso” in the Journal of the Experimental Analysis of Behavior. In it, they showed:

“Pigeons successfully learned to discriminate color slides of paintings by Monet and Picasso. Following this training, they discriminated novel paintings by Monet and Picasso that had never been presented during the discrimination training. Furthermore, they showed generalization from Monet’s to Cezanne’s and Renoir’s paintings or from Picasso’s to Braque’s and Matisse’s paintings. These results suggest that pigeons’ behavior can be controlled by complex visual stimuli in ways that suggest categorization. Upside-down images of Monet’s paintings disrupted the discrimination, whereas inverted images of Picasso’s did not. This result may indicate that the pigeons’ behavior was controlled by objects depicted in impressionists’ paintings but was not controlled by objects in cubists’ paintings.”

Birds and bees

Later on, in 2013, behavioral scientists showed that honeybees could also discriminate between paintings by the two artists.

Perhaps more hilariously, a 2010 article in the journal Animal Cognition showed that “Pigeons can discriminate “good” and “bad” paintings by children.” Imagine a pigeon letting your child know their art is “bad.”

Wonder how it was done? In the words of the researcher:

“In this study, I investigated whether pigeons could be trained to discriminate between paintings that had been judged by humans as either ‘bad’ or ‘good’. To do this, adult human observers first classified several children’s paintings as either ‘good’ (beautiful) or ‘bad’ (ugly). Using operant conditioning procedures, pigeons were then reinforced for pecking at ‘good’ paintings. After the pigeons learned the discrimination task, they were presented with novel pictures of both ‘good’ and ‘bad’ children’s paintings to test whether they had successfully learned to discriminate between these two stimulus categories. The results showed that pigeons could discriminate novel ‘good’ and ‘bad’ paintings.”

Who knew nature had such art critics?! — WTF fun facts

Source: “Pigeons’ discrimination of paintings by Monet and Picasso” — Journal of the Experimental Analysis of Behavior

WTF Fun Fact 13105 – The Banana Curve

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Have you ever looked at the way a specific food grows and been totally surprised? We’ve certainly felt that way – especially about asparagus and pineapples. Now the banana curve is blowing our minds (with how little we know about our food).

How the banana gets its curve

The reason bananas don’t grow straight and instead have a curve is so that they can retrieve sunlight. It makes sense, we just couldn’t quite picture it at first.

According to Chiquita, “Bananas go through a process called ‘negative geotropism’…What it means is that bananas grow away from the ground, instead of growing towards it, hence the ‘negative’ geotropism.”

Despite bananas being ubiquitous on grocery store shelves, they come from the rainforest (or at least places that can simulate that environment). In a place with so much foliage, bananas had to find a way to claim some sunlight for themselves since they hang downward.

Bananas evolved not to grow straight up but rather to curve in order to get around the foliage and soak up some rays.

More about banana growth

You might think that if it’s looking for the sun, a banana would evolve to grow upwards. But they’re simply too heavy to do that. Because gravity pulls them down, they develop a slight curve rather than a new growth pattern.

Not only is banana growth a fun new fact for us, but we also didn’t know they were considered a berry. Bananas may have actually been one of the first fruits. They date back about 10,000 years, although they taste much different now.

And it turns out the world loves them – we consume about 100 billion bananas globally every year. — WTF fun facts

Source: “Bananas. Not only one of the healthiest fruits but most recognizable!” — Chiquita

WTF Fun Fact 13095 – Hiroshima, Rabbit Island

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Okunoshima (aka Rabbit Island) is a small island located in the Inland Sea of Japan, 43 miles east of the city of Hiroshima. It used to be used for weapons testing but is now inhabited by adorable bunnies.

—WTF fun facts

Source: “EVERYTHING YOU NEED TO KNOW ABOUT VISITING OKUNOSHIMA RABBIT ISLAND” — Wander Eat Write

WTF Fun Fact 13084 – Moby Duck

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You’ve no doubt heard of the book Moby Dick. But have you heard of the incident referred to as Moby Duck? Let’s just say that while it involves an ocean, whales aren’t the main character in this story.

What was Moby Duck?

In 1992, a shipment of children’s bath toys fell into the North Pacific Ocean on its way from China to the U.S. The accident dumped 28,000 rubber ducks into the water, where they were carried far and wide by the currents. They’ve been found on the shores of Alaska and even in Maine (which means they make it all the way to the Atlantic).

More than a decade after the incident, a journalist named Donovan Hohn decided to see if he could track the ducks, enlisting the help of citizen beach-goers and oceanographers alike.

“I figured I’d interview a few oceanographers, talk to a few beachcombers, read up on ocean currents and Arctic geography and then write an account of the incredible journey of the bath toys lost at sea,” he told NPR’s Dave Davies on Fresh Air in 2011 (cited below). “And all this I would do, I hoped, without leaving my desk.”

He detailed the journey in a book called Moby-Duck: The True Story of 28,800 Bath Toys Lost at Sea and of the Beachcombers, Oceanographers, Environmentalists and Fools, Including the Author, Who Went in Search of Them.

An environmental angle

While the idea of tracking the toys sounds cute on some level, Hohn also found out just how much plastic is on our oceans and the effects it has on the environment. Plastic doesn’t biodegrade, so those ducks will be around for centuries. Or at least pieces of them will.

While the ducks may photodegrade (due to sunlight), they simply fall apart into smaller pieces of plastic we can’t see. But that plastic still ends up inside wildlife and ocean garbage patches.

“We know that in the marine food web, there is an alarmingly elevated contaminant burden in species at the top of the food web,” Hohn said. “What role plastic plays in that is an ongoing area of study.” — WTF fun facts

Source: “‘Moby-Duck’: When 28,800 Bath Toys Are Lost At Sea” — NPR

WTF Fun Fact 13079 – Snowflakes Require Dust or Pollen

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Snowflakes are frozen bits of water that form around a “nucleus.” That nucleus is something that must already exist in the air – like a dust or pollen particle.

How are snowflakes made?

All political jokes aside, snowflakes are actually an interesting natural phenomenon.

According to the National Oceanic and Atmospheric Administration (cited below): “A snowflake begins to form when an extremely cold water droplet freezes onto a pollen or dust particle in the sky. This creates an ice crystal. As the ice crystal falls to the ground, water vapor freezes onto the primary crystal, building new crystals – the six arms of the snowflake.”

This doesn’t mean the air is dirty or polluted – after all, pollen is completely natural!

Who are snowflakes so unique?

You may be wondering why all snowflakes are unique if they each require the same circumstances in order to form.

NOAA has an answer for that!

Snowflakes are made up of ice crystals. These build up around the nucleus symetrically “because they reflect the internal order of the crystal’s water molecules as they arrange themselves in predetermined spaces (known as “crystallization”) to form a six-sided snowflake.”

A combination of air temperature, humidity, and the speed at which they fall determine precisely how the ice crystals form into different shapes. When it warmer, the crystals have a longer, sharper shape and when it’s cold, they tend to be shorter and flatter.

Snowflakes always have six sides, but those “arms” can branch off in different directions depending on those factors as well.

That’s why no two snowflakes are exactly alike.

Of course, when you get 5 or 6 feet of snow, it’s pretty hard to think about those snowflakes as individuals! They all go in the same shovel! — WTF fun facts

Source: “How do snowflakes form? Get the science behind snow” — NOAA

WTF Fun Fact 13078 – World’s Biggest Snowflake

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We really can’t picture the world’s biggest snowflake. Apparently, it was 15 inches long. But there is no photo since it was spotted by multiple people all the way back in 1887. Nothing has overtaken it in the Guinness Book of World Records because…well, how do you preserve a snowflake long enough to prove it?

According to the Guinness Book of World Records page for the “largest snowflake”: “It is reported that on 28 Jan 1887 at Fort Keogh, Montana, USA, ranch owner Matt Coleman measured a snowflake that was 15in 38cm wide and 8in 20cm thick, which he later described as being ‘larger than milk pans’ in Monthly Weather Review Magazine.”

Spotting the world’s biggest snowflake

Experts insist that snowflakes as large as frisbees or basketballs aren’t entirely out of the question – but they’re likely multiple snowflakes attached to one another.

Yet, since the 19th century, there have been multiple recorded sightings of such giant flakes falling from the sky (and really falling since their weight and size would make them fall faster than small snowflakes).

According to the NYT (cited below), there are still questions.

“But the evidence was always sketchy and, because of the fragile nature of snowflakes, fleeting. The giant flakes were not quite in the category of sea monsters or U.F.O.’s. Even so, skeptics noted the human fondness for exaggeration, as well as the lack of convincing photographs. And the organizations that compile weather records never made tracking big flakes an observational requirement. So the giants languished in a twilight world of science, their existence claimed but seldom documented.”

Snowflakes can get BIG

Maybe there really was a 15-inch snowflake. Multiple Army officers reported seeing them, as did a nearby rancher in Montana where they fell. But what other evidence could we reasonably expect?

There’s not much restricting the possible size of snowflakes other than the wind. It’s likely that a truly huge flake would be torn apart before anyone could see it.

Yet, if you look back far (and wide) enough in history, there are multiple mentions of abnormally large flakes. These days, anyone with a ruler and a camera could document the world’s biggest snowflake if they wanted to.

According to the NYT:

“William S. Pike, a British weather observer for the Royal Meteorological Society, found 11 poorly known reports, which he described in The Journal of Meteorology in January 1988. He wrote that reliable observers of big flakes estimated their diameters at anywhere from two to six inches.” —WTF fun facts

Source: “Snowflakes as Big as Frisbees?” — New York Times

WTF Fun Fact 13064 – Australia’s Pink Lake Hillier

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Australia’s pink Lake Hillier is located in Western Australia. It lies near the Pacific Ocean, so when viewed from above the fact that the lake is bright pink is even more striking.

Australia’s pink lake

It’s less than a half mile across (600 meters x 250 meters, more specifically), but Australia’s pink Lake Hillier is truly a sight to behold. Unfortunately, you can no longer access it from land.

The good news is that while it’s Australia’s most famous pink lake, it’s not the only one. And there are others in the world as well. Senegal, Mexico, Spain, and Azerbaijan all have pink lakes too.

According to Lake Hillier’s website (cited below):

“The reason of its unique colour is still a topic that is not fully understood by scientists, although most suspect it has to do with the presence of the Dunaliella salina microalgae. The Dunaliella produces carotenoids, a pigment found in carrots as well. But the presence of halophilic bacteria in the salt crusts could be another explanation. A reaction between the salt and the sodium bicarbonate that is found in the water may cause it as well.”

More facts about Lake Hillier

Discovered in 1802 by cartographer Matthew Flinders, the lake is located on Australia’s Middle Island in the Recherche Archipelago. It’s most pink when viewed from above. And, unlike other pink lakes, its water samples appear pink in a glass as well.

While it’s safe to swim in, you can’t actually get near its surface.

“There are Scenic Flight Services departing Esperance Airport several times a day but you cannot land on Middle Island…There are no regular services to set foot on any of the Islands in the Recherche Archipelago with the exception of Woody Island.”

If you try to get to the lake, don’t be fooled by the nearby Pink Lake (aka Lake Spencer) in the town of Esperance. That lake used to be pink but has lost all its color and is now a milky white.

You’ll just have to enjoy Australia’s pink Lake Hillier from above, which is the best way to see its color anyway. — WTF fun facts

Source: “Lake Hillier” — Lake Hillier Official Website

WTF Fun Fact 13062 – Catnip Better Than DEET

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Could catnip be better than DEET at repelling insects? If so, that’s great news for those of us who would like to avoid spraying synthetic compounds all over our bodies.

Research on repelling insects with catnip and DEET

Researchers from Northwestern University and Lund University have been investigating catnip as an insect repellent, particularly for mosquitos. Since mosquitos carry potentially deadly diseases, it’s crucial to find a way to protect vulnerable people during warm weather.

Catnip is part of the mint family and, when dried, is exactly the same substance that you’ll find inside cat toys. However, catnip extract – a more concentrated form – is what you’d need to scare away mosquitos and other insects.

An ancient insect repellent

“Catnip and its active ingredient, Nepetalactone, have been used for millennia to ward off insect pests, at least since the time of Pliny the Elder,” said Marcus C. Stensmyr, associate professor at Lund University. “But why Catnip is so potent on such a broad range of insect species has remained unknown.”

According to Northwestern University’s website on the research “Traditional approaches to mosquito control involved insecticides, but those eliminate other insect species as collateral damage. Modern formulations of insect repellents such as DEET target mosquito odor and taste receptors, rendering the insect incapable of recognizing the chemical cues that signal a human prey.”

Nepetalactone, the active compound in catnip activates a pain receptor found in some insects. It’s still unclear how cats are so attracted to it.

So-author Marco Gallio noted that plant-derived repellants like catnip are also cheaper and more readily available than something like DEET.

In 2001, a paper presented at the American Chemical Society suggested that nepetalactone could be up to 10x more effective than DEET in repelling insects. — WTF fun facts

Source: “Could catnip become the new DEET?” — Northwestern Now

WTF Fun Fact 13060 – Swimming With Pigs In The Bahamas

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Swimming with pigs in the Bahamas might sound like a great tourist activity. And thousands of people have enjoyed it. But like so many other “animal attractions,” it’s turning out to be great for marketing but not great for the animals themselves.

In 2017, seven pigs were found dead. Originally, wildlife specialists thought they may have been intentionally poisoned by tourists. But it turns out that while tourists are at fault, it was an accident.

The swimming pigs of the Bahamas

Big Major Cay in the Exumas is an uninhabited island. Except for the 20-30 feral pigs who live there. No one knows how the pigs got there, but they were likely left by sailors or escaped a ship and swam to shore.

The pigs love swimming and are generally pretty cute, so they make a great tourist attraction. For a couple of hundred dollars, you can go to the island and swim with the pigs, bringing them all sorts of snacks.

But if you really love wildlife, you’d probably do best to let them be.

It’s not the snacks themselves that harm the pigs. It’s the fact that humans have lured them down to the shores of the beach to get food. Why would they hunt for it themselves if it’s being handed out on the beach?

The death of the swimming pigs

In February of 2017, people were shocked to learn about the death of 1/3 of the beloved pigs. There were fears that tourists had given them alcohol and killed them.

But once they had autopsies, wildlife experts determined that sand played a huge role in their demise. Sand can’t be digested, so when the pigs snarf up a tasty snack off the beach or forage through the sand themselves when tourists aren’t around, they end up getting sand in their stomachs.

The dead pigs were full of sand.

A little over a dozen pigs remained after the tragedy. And you can still go see and swim with them. However, the Bahamas passed legislation to protect them and insisted tourists don’t leave behind any food. The beach is for lounging and swimming only.

A warden is now stationed at Pig Beach to keep tourists from breaking the rules. — WTF fun facts

Source: “Bahamas ‘swimming pigs’ killed by ingesting sand” – Scuba Diver Magazine

WTF Fun Fact 13058 – The History of November’s Birthstone

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Today, gemstones have been officially defined by their chemical properties, and jewelers for over a century have tried to standardize birthstones based on the gems most readily available for customers to buy. But the history of November’s birthstone – the topaz – is a curious one.

What’s a topaz?

Today, you can choose from topaz or citrine (which is more affordable) for your November birthstone. That’s likely because traditional yellow topaz is harder to come by (and it’s a very hard gem, just behind diamonds on the Mohs scale). But did you know that natural topaz doesn’t have any color at all?

It’s the impurities found in the soil around gems that lends them their color. However, gemstone sellers will also use additives to give them a specific glow as well.

According to The Farmer’s Almanac, “…it’s impurities that cause this normally colorless stone to come in a dizzying array of hues. Red and pink shades come from chromium while the classic blue color is an unnatural shade that comes from exposing mined topaz to high-energy radiation. There are also highly prized sherry-colored stones in shades of orange and pink, which are referred to as “imperial topaz” after the 19th-century czars of Russia.”

The history of November’s birthstone

Topaz is so strong and resistant to heat that it’s used in industry as well as in jewelry. The most prolific topaz mines are in Australia, Italy, Norway, Pakistan, Russia, Sri Lanka, Sweden, and Utah.

Topaz has been associated with November birthdays since the 15th century at the very least. But it wasn’t until 1912 that the National Association of Jewelers made it an official birthstone.

Farmer’s Almanac also notes that “The name comes from Topazios, the Greek name for what is now known as St. John’s Island, an Egyptian island in the Red Sea. Interestingly, during that era, this was the name given to any yellow stone. In fact, the original ‘topaz’ from which the modern gem gets its name was most likely chrysolite.”

Defining topaz

In 1737, the first modern piece of topaz that would set the definition from there on out was found in Germany. But since these modern pieces tended to be hard and colorless, many miners assumed they were diamonds. The Portuguese crown was filled with topaz assumed to be diamonds in the 18th century.

We often associate gemstones with certain “powers.” For topaz, this tends to be protection from greed and a balanced emotional state.

Over the centuries, people have thought topaz had the power to cool water, cure fevers, direct dreams, grant intelligence, and even cure weak vision. — WTF fun facts

Source: “November Birthstone – All About Topaz” — Farmer’s Almanac