Nature

WTF Fun Fact 12807 – Snails Have Teeth

Have you ever wondered how a snail eats? We sure haven’t! But it turns out that snails have teeth laid out along their tongues – thousands of them, in fact.

Snail “teeth”

Snails have teeth, but they’re nothing like human teeth. First, the rows of minuscule teeth are laid out on their tongues. (We never really thought about whether snails had tongues either, to be honest).

According to Dr, Gordon Port, senior lecturer at Newcastle University: “A snail will use its toothy tongue ­– called the radula – almost like a file, scraping off the softer parts of their food when eating. Their teeth normally get worn down by this action, so they’re replaced regularly.”

A “toothy tongue”

BBC Science Focus (cited below) describes some of the variations on these “toothy tongues:”

“There are also some (downright terrifying) radula variations. Species such as cone snails – that are mainly found in warm and tropical waters – have a venomous radula that is used to paralyse prey before eating.

In case you’re wondering, slugs also have a radula, which similarly are fitted with thousands of tiny teeth. Some predatory slugs, such as the Welsh ghost slug, have radulae with razor-sharp teeth – each about half a millimetre long – that are used to kill and eat earthworms.

Many squids also have a radula inside their mouth. As its throat passes directly through the brain, a squid’s toothy tongue is needed to break down food into tiny pieces. Because, let’s face it, a piece of crab knocking against your brain is bound to ruin supper.”

What do snails eat?

Snails eat at night for the most part – which we’re grateful for, since they sound like pretty messy eaters.

And Port told BBC that they’ll eat just about any organic matter, like young plants. “And some species, such as Moon snails, are even known to eat each other. But, mostly, any decomposing matter will do.”

As long as snails aren’t chewing your foliage, they can be good for gardens since they eat decomposing matter and then serve as food for other animals.

– WTF fun facts

Source: “Do snails have teeth?” — BBC Science Focus

WTF Fun Fact 12799 – The Migratory Monarch Butterfly Is Endangered

Migratory monarch butterflies (Danaus plexippus plexippus) are a subspecies of monarchs, and while you may have seen them in your backyard growing up if you’re over 40, chances are you’ve seen a lot less of them lately. Migratory monarchs are now endangered and could go extinct.

The iconic monarch butterfly

These iconic American butterflies are black and orange. Like other monarchs, their larvae feed on only one plant – milkweed. Climate change and fires have destroyed much of the milkweed in America and conservationists are encouraging people to plant more.

The butterflies are also threatened by pesticides, herbicides, deforestation, and urban development. In fact, they’re so threatened that a Switzerland-based conservation organization that monitors the status of wildlife – the International Union for Conservation of Nature (IUCN) – has added them to the list of threatened species.

They join around 41,000 other species that could become extinct without intervention.

Migratory monarch populations

Migratory monarchs in the American West face the largest extinction risk, having lost 99.9% of their population over the last 40 years, according to Smithsonian Magazine (cited below).

The number of Western migratory monarchs went from ten million in the 1980s to 1,914 by 2021. That may not be enough butterflies to keep the population alive.

But according to Smithsonian Magazine, there’s still hope:

“To help boost monarch numbers, scientists and conservationists recommend planting more milkweed and nectar flowers, maintaining forests and limiting the use of pesticides and herbicides in the butterflies’ range, report CNN’s Madeline Holcombe and Jalen Beckford.

​​“People recognize the monarch,” Anna Walker, an entomologist at the New Mexico BioPark Society who led the assessment, tells the Washington Post’s Dino Grandoni. “People love the monarch. So that gives us an opportunity to do the outreach and get people on board.”

– WTF fun facts

Source: “Migratory Monarch Butterflies Are Listed as an Endangered Species” — Smithsonian Magazine

WTF Fun Fact 12774 – A Tick Map for Public Health

Scientists believe that releasing a “tick map” each year (or as often as needed) would be a great public health strategy to allow people to ward off tick-borne diseases. Now, researchers are trying to make it happen.

Why a tick map?

From hikers to vacationers, each summer and fall people head out to new locales without quite knowing the dangers that lurk in tall grasses and forests. These days, tick-borne diseases are spreading more rapidly than ever and it’s causing some big concerns for health professionals. Some of these diseases can be debilitating, and in many cases, a bit of Deet spray just isn’t enough to avoid the danger.

Enter the tick map. If a map of locations where ticks are common (and commonly associated with particular diseases) was available ahead of time, it would not only help raise awareness of the need to avoid ticks but help people take better precautions.

Knowledge is power, after all. But simply telling people there are risks out there does not lead to enough action to stop the spread of diseases that take major resources to treat.

How does a tick map work?

A tick map would involve some predictions, so researchers are still trying to come up with the ideal way of forecasting the locations. And it’s complicated.

According to Scientific American (cited below): “Many factors, not all of them well understood by scientists, shape where and when disease-carrying tick species will thrive—and if they are likely to carry a pathogen at all. Every year people are diagnosed with and treated for tick-borne illnesses such as Lyme disease, anaplasmosis, and Rocky Mountain spotted fever. For Lyme disease alone, the annual figure is nearly half a million, according to estimates from the U.S. Centers for Disease Control and Prevention. And that number is expected to rise as many tick species continue to expand their ranges.”

The only system we have now is relying on people to know where ticks may be a problem so that they can use tick repellant, wear long sleeves, cover their ankles, and perform tick checks on themselves and their pets.

But if we had a tick map, things might be different: “If hikers, for example, have a forecast indicating that the woods they are passing through are likely to have dangerous ticks, they can take extra steps to protect themselves with bug repellent, long sleeves and tight pant cuffs. Local health care providers can make sure they are looking out for symptoms of tick-borne illnesses. Local officials can advise citizens on how to take care outside during the danger season. But making accurate predictions is complicated. Many factors, not all of them well understood by scientists, shape where and when disease-carrying tick species will thrive—and if they are likely to carry a pathogen at all.”

The other cool thing about having a tick map is that it would show when risks are low, allowing people to relax some of those protocols when they aren’t necessary.

Why is it so hard to build the map?

Risk levels can be hard to gauge, however. Ticks need humid summers, enough animal hosts, and the right habitat, for starters. They don’t like cold winters and hot, dry summers. But there’s way more that goes into creating a predictive model that’s actually useful to people, including specific tick species that carry different diseases or thrive in slightly different environments.

To add to the complexity, we’re still learning about the other kinds of flora and fauna that are abundant in tick-heavy areas, such as a specific type of acorn that one type of tiny mouse feeds on – they’re common when ticks are abundant and they’re a reservoir for Lyme disease. All of those elements need to go into the model. And to top it off, we don’t entirely understand how Lyme disease works.

At the moment, the best data we have is only for one tiny area of the country. Other areas may need different predictive models. According to SciAm, “Data collection is one piece of that puzzle, but another is a better understanding of how ticks interact with host species, both human and nonhuman, and how the arthropods act as conduits for disease.”

So, in the meantime, cover up and check for ticks after a walk in the woods!

– WTF fun facts

Source: “The Quest for a ‘Tick Map’” — Scientific American

WTF Fun Fact 12771 – The Saraha Desert Forest Mystery

Ok, trigger warning: There’s a high chance of getting Toto’s “Africa” stuck in your head by reading this post. But, the truth is, there used to be plenty of rains down in Africa. Enough to have made the Saraha Desert a rainforest.

It’s not a huge shock, since we know the Earth has gone through different climatic periods, but this was one far more recent and accounts for a more radical change than scientists ever could have imagined. In other words, it really takes a lot to turn a vibrant forest into a bone-dry desert, and this happened a mere 6000ish years ago! It’s pretty interesting.

How did the Sahara go from forest to desert?

So, what’s the deal here? Well, since we don’t have a time machine, we can’t know for certain. It could have to do with the tilt of the Earth’s orbital axis changing, it could also be part of a longer, larger pattern of transition.

African Humid Periods in the distant past meant….you guessed it…more rains down in Africa. In particular, northern Africa (which is where the Sahara is, in case you don’t have a map handy). But at some point, those rains went away.

As Smithsonian Magazine (cited below) explains:

“With more rain, the region gets more greenery and rivers and lakes. All this has been known for decades. But between 8,000 and 4,500 years ago, something strange happened: The transition from humid to dry happened far more rapidly in some areas than could be explained by the orbital precession alone, resulting in the Sahara Desert as we know it today.”

Cool use of archaeological data

We can see from archaeological data (which is not perfect, but is overwhelmingly in favor of showing past water and trees in certain areas) that the area was once forest, and even rainforest. But what’s also interesting – and seals the deal for most people – is that in this period there is also evidence of pastoralists. That means people were raising and herding animals. And you definitely can’t do that in a desert.

Are humans to blame?

If it wasn’t solely an axial issue (regarding the Earth’s tilt), some scientists believe that humans could have played a big role in changing the climate due to overgrazing.

There have been suggestions that the end of the humid period in northern Africa could have been brought about by humans letting domesticated animals eat up all the moisture-loving plants. They would have probably had to use fire as a land management tool as well. And that may have been enough to trigger the big change that turned the forest into a desert.

It’s not that easy, of course, but that’s the general idea. There are also hypotheses that humans had nothing at all to do with it. And neither one of those would be related to whether or not humans are affecting the climate currently, so it’s not a political discussion (thankfully). – WTF fun facts

Source: “What Really Turned the Sahara Desert From a Green Oasis Into a Wasteland?” — Smithsonian Magazine

WTF Fun Fact 12770 – Grapes In A Bottle Of Wine

Have you ever wondered how many grapes are in a bottle of wine?

Well, it all depends on the type of wine you’re drinking, but typically it’s around 600-800. However, some bottles contain up to 1200 grapes.

Harvesting grapes for a bottle of wine

Protecting a vineyard from birds, bees, deer, and other pests that enjoy poking into and picking off grapes takes a lot of work. But if you’re able to get around ten good clusters, you’d be able to make at least one bottle of wine (although the wine-making process is pretty laborious for such a small payoff).

As grapes are harvested in the fall, imperfect clusters get tossed to the side. And many high-end vineyards will pick off each grape and try to inspect them individually to ensure they’re in good shape and free of pests that might change the taste of a wine (such as ladybugs).

The number of grapes in a bottle of wine may vary

You can’t make good wine out of just any old grapes. For example, concord grapes often get sold to big corporations such as Welch’s for grape juice (the non-fermented kind).

Wine grapes need extra help and aren’t sold at grocery stores. But if you want to get a sense of how many grapes are in a bottle of wine, think of it this way – most bags of grapes at the grocery store have about 3 – 4 clusters inside. So it would take at least three bags to make just one bottle of wine.

So, if three bags of grapes costs you a few dollars, you know that wine you’re getting at the under $10 price point is probably not all that special (though it can still be tasty!).

Vineyard vines

A vineyard can produce anywhere from 2 to 10 tons of grapes per acre, depending on the farming methods they employ. For example, organic vineyards will produce close to 2 tons per acre.

According to VinePair (cited below): “The output level of a vineyard is where price and quality get determined. A vineyard that produces less grapes per acre results in grapes that are usually fuller in flavor and more concentrated, whereas a vineyard with a large output generally creates grapes whose juice is watery, which means it ultimately will take more grapes to create a flavorful wine.”

When we’re talking about grapes per bottle, we’re looking at around 700+ bottles per acre (or around half a million grapes).

So if you’re buying wine from a small estate, chances are they are producing far less wine and are typically charging more. Of course, if the vineyard had a famous brand name attached, you’re also paying for that. – WTF fun facts

Source: “How Many Grapes Are Inside Your Bottle Of Wine?” — VinePair

WTF Fun Fact 12767 – Lyrebird Mimicry

There are actually two types of lyrebirds, both live in Australia, and both are fabulous mimics. We just think the superb lyrebird has a better name. The other one is called Albert’s lyrebird and it’s a little less showy (but equally capable of mimicry).

Lyrebird taxonomy

The superb lyrebird belongs to the genus Menura (family Menuridae, order Passeriformes, if you like to get truly taxonomic). The birds live in the forests of southeastern Australia and do not fly – they are groundbirds.

For the most part, they’re not so impressive to look at. They look a lot like brown chickens. Well, except for the male superb lyrebird – he has to show off to attract females.

What does a lyrebird look like?

According to Britannica (cited below), “the male’s tail consists of eight pairs of ornate feathers, which resemble a lyre when erect. There are six pairs of filmy whitish feathers. One pair of 60–75-cm (24–30-inch) feathers that form the arms of the ‘lyre’ are broad and curled at the tip and are silvery on one side and marked with golden-brown crescents on the other. There are also two equally long ‘wires,’ narrow, stiff, slightly curved feathers that correspond to a lyre’s strings; they are situated in the centre of the curved ‘arms’…When the male displays in small clearings, which he makes at several places in the forest, he brings his tail forward so that the white plumes form a canopy over his head and the lyrelike feathers stand out to the side.”

Lyrebird mimicry

Here’s our favorite part of Britannica’s description: “In this position he sings, while prancing in rhythm, far-carrying melodious notes interspersed with perfect mimicry of other creatures and even of mechanical sounds.”

You might not think much of that at first, but the fact that a bird can mimic just about any sound is not only impressive but potentially creepy. Imagine walking through the deep forest in Australia (known for all manner of amazing-yet-terrifying creatures) only to hear the sound of a predator, a crying child, or a chainsaw!

We’d be freaked out, to say the least.

Seriously, listen to this bird mimic a baby crying!

Ok, now listen to construction noise (we had to double-check to make sure it was real):

Next time you head construction in the outback, look closer to the ground if you don’t see any men with tools. It may just be a lyrebird trying to troll you.

– WTF fun facts

Source: “Lyrebird” – Britannica

WTF Fun Fact 12758 – Jason deCaires Taylor’s Underwater Sculptures

Jason deCaires Taylor is an environmentalist and artist who is drawing attention both to and away from the world’s vulnerable ocean reefs.

While there are many factors affecting the world reefs and the rest of the aquatic ecosystems, tourism has been a major factor in damaging some of these structures. So Taylor has decided to give people something else to visit – underwater sculptures.

The underwater sculpture parks of Jason deCaires Taylor

Throughout the world’s oceans, you will find amazing, sustainably made sculptures – and in some cases entire sculpture parks. Divers can not only visit these, but in some cases they are becoming their own ecosystems.

According to CBS News (cited below0: “Each year, over half a million people worldwide visit Taylor’s museums and sculpture parks. These unique underwater attractions act as portals to the marine world and provide visitors with intimate encounters with marine life and an alternative perspective on our blue planet.”

The underwater sculpture park

Luckily, you don’t have to be an expert diver to visit many of these creations. In fact, you can just get out your snorkle for most of them.

Taylor’s Molinere Underwater Sculpture Park off the coast of Grenada is a mere 15 feet deep. It was created after a hurricane damaged many coral reefs off the coast of the island.

According to CBS news: “The sculptures made of non-polluting concrete kept growing and changing as ocean creatures moved into them along with plants and fish. Coral is slowly turning the sculptures into artificial reefs.”

Encouraging life under the sea

Taylor builds his eco-friendly pH-neutral concrete sculptures in barren parts of the underwater world. That way, he’s not displacing anything that already lives there.

In the end, the fact that his art encourages life to flourish nearby is giving aquatic creates more options to sustain life. – WTF fun facts

Source: “Artist turns seafloor into art by creating underwater museums” — CBS News

WTF Fun Fact 12757 – The Bahamas’ Underwater Statue

Have you ever wanted to see a famous statue but didn’t want to wait in line?

Well, how do you feel about going to the Bahamas to see it?

Ok, NOW, how do you feel about diving into the crystal clear ocean about 16 feet down to see it?

If you’re still thinking “this sounds great!” it might be time to book a trip to Nassau, Bahamas.

What, exactly, is the underwater statue “Ocean Atlas”?

According to Culture Trip (cited below): “You’ll find Ocean Atlas, a spectacular underwater sculpture by Jason deCaires Taylor, off the western coastline of New Providence, which has the largest population of any island in the Bahamas. It’s also where you’ll find the Bahamian capital, Nassau. Ocean Atlas is the world’s largest single underwater sculpture, and it doubles as a navigational aid, with a flag attached to the top poking above the water.”

The sculpture isn’t of the Greek god himself, but of a little girl carrying the weight of the ocean on her shoulders.

No mercy from Zeus

If you remember being taught about ancient Greek gods and goddesses, Atlas was a Titan – one of the deities who came before the ancient Greek gods. When the Titans tried to fight the gods, Atlas’ punishment from Zeus (who was, let’s face it, a real jerk) was being forced to hold up the heavens for eternity.

The statue is just a nod to the myth, and the subject is a local Bahamian girl. She can be viewed from just 16 feet beneath the clear water, so snorkeling or scuba diving will give you a great view of the piece which weighs 66 tons.

A sustainable underwater sculpture

The coolest thing about the “Ocean Atlas” is that it’s made from pH-neutral materials and does not damage the surrounding ocean environment (other than draw tourists). it was actually designed to draw divers away from more popular spots so the reefs and aquatic life could start to recover.

According to the artist’s website, the materials are stainless steel, pH-neutral cement, basalt and aggregates.

It’s just not an option to close some of those other sites since many tourists go to the Bahamas just to dive and see the reefs.

A whole new world

The VERY coolest thing about “Ocean Atlas” is that it is now breeding its own ecosystem as wildlife is attracted to it and it serves as an artificial reef that houses some coral (which is what gives reefs their color).

It’s also not super easy to get to, so you have to rent a charter boat and follow directions pretty closely in order to see her. In other words, humans have to behave responsibly around the statue so it’ll be there for the oceans and the people who live above them to enjoy. – WTF fun facts

Source: “How to See Ocean Atlas – the World’s Largest Underwater Statue” — Culture Trip

WTF Fun Fact 12755 – The Caño Cristales, Colombia

The Caño Cristales is a river in Colombia that some call the “Liquid Rainbow.”

But before you start planning a trip to the Colombian National Park of La Macarena, you should know that it’s rare to see all of these colors together. For the most part, the river looks red.

What causes the colors of the Caño Cristales?

The water of the river is actually crystal clear. It’s what lies beneath that brings the river to life – quite literally.

The Caño Cristales lies at the center of three distinct ecosystems, so it’s hard for flora or fauna to thrive there. But one organism has managed to get the hang of it –

is quite clear due to a lack of biodiversity. The colors are caused by red algae called Macarenia clavigera that cling to the rocks beneath and reflect different hues depending on the depth of the water and time of year.

Care for a visit to Caño Cristales?

If you do want to visit the Caño Cristales, it’s most colorful during the algal bloom and will turn red from late May and late November, but the peak time to see the colors is between July and October.

But you cannot visit alone – it’s just too hard to get to. You’ll need a guide for the park. You also cannot swim or be anywhere near the river if you’re wearing sunscreen or any body cream, since it may kill the algae.

But according to Culture Trip, “In spite of that, there is a lot more to see and do on a tour to Caño Cristales than just seeing the red river. The river itself is located alongside the huge La Macarena National Park, which is a vast area home to savannahs, incredible rock formations, jungles, and bird and mammal watching. Most tours last three to four days and take in a variety of sights.” – WTF fun facts

Source: “10 Things to Know Before Visiting Caño Cristales, Colombia” — The Culture Trip