Category Archives: Science & Technology

Design Undusted: Norman Doors

You have all come in contact with a Norman Door, even if you might not have known that’s what it was called. Remember the last time you tried to go through a push door by pulling on it? That’s a Norman Door. The name comes from Donald Norman who, after spending time in the UK, wrote a book called, “The Psychology of Everyday Things“, later changed to, “The Design of Everyday Things“. Doors are a prevalent example: Every building has them, but they are not necessarily put through any stringent tests of user-friendliness; if the hinges are hung straight, and the door swings one way or the other, that’s usually enough to pass. Donald Norman’s point is that if people are using a product the wrong way, it’s not their fault – it’s poorly designed. He popularized the term “user-centred design” – designs based on the needs of the users, whoever and however many they might be. Below are a few examples of failed designs – either inconvenient to use or just downright impossible. Next time you come across an object with poor usability, you’ll at least know what to call it.

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Nature Undusted: Magnetic (Gravity) Hills

When I was growing up, I went to a place called Silver Dollar City (in Branson, Missouri) several times; it is a family amusement park with rides and various attractions. One of my favourite attractions was a house that played with your mind: It had water running up a drain, floors that tilted at different angles from room to room, and optical illusions that played with proportions and directions in your perceptions. You simply couldn’t trust what you felt or saw while in that house, and when you came out, it took a minute or two to right your bearings again.

But did you know that there are natural anomalies? Throughout the world, there are areas known as magnetic hills, magic roads or gravity hills. Due to the surrounding geography, the road or stream may appear to be going uphill, when in fact it’s going downhill; this makes water look like it’s flowing upward, or cars in neutral appear to be defying gravity by rolling uphill. It’s nothing more than an optical illusion, but such places attract visitors, the curious and the thrill-seekers.

Wikipedia has a list of over a hundred recognized places; chances are, there might be one near you.

To see the phenomena, click on this link to a short YouTube video about New Brunswick, Canada and the history of what was first known as “Fool’s Hill”.

Magnetic Hill

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Food History Undusted: Mac & Cheese

As I recently mentioned, we had problems with kitchen moths; the source has been found (dates) – the jar which contained them also isolated them; I played the jar like a maraca and sang “La Cucaracha” as we put them in the compost. We are now moth-free! Woo-hoo!

We really appreciate the advantages of storing everything in glass jars: It looks pretty, we can see exactly how much we have, what we have, and it’s inviting to be creative in meal planning. One of the pasta jars we have contains mini “Hörnli / Hoernli” – the Swiss word for “little horns” and what the rest of the world probably refers to as macaroni. The topic came up as a meal idea, and of course, being us, we got into the historical aspect. Where did it originally come from? Did it arrive in America with Italian immigrants or is it a hybrid dish?

Mac & Cheese History

This image above is nearly sacrilege for many people, myself included – I cannot imagine eating pasta from a can! But just after World War 2, manufacturing of canned goods, frozen meals and the like were coming into their stride as families pieced their lives back together and got on with the business of rebuilding the country and economy; televisions entered the home mainstream in the early 1950s (think black and white, rabbit ear antennas, no remote and 2 channels) – but that’s another topic. Product placement during television programmes and news was a major factor in influencing the purchasing power of the average consumer (product placement may have begun as early as 1873, when Jules Verne’s fame led shipping companies to lobby being mentioned by name in his upcoming novel,  “Around the World in 80 Days”).*

The oldest known reference to a dish that may be recognizable as the ancestor to the modern concoction is from the 13th century, from someone in the court of Charles II of Anjou who was familiar with the Neapolitan court; the dish was basically prepared with sheets of lasagne sliced into small squares, cooked in water and tossed with Parmesan cheese. The American version some might be more familiar with has two claims to ancestry: Either it began as a Connecticut church supper dish known as Macaroni Pudding, or it was brought over from Italy in the form of a recipe by Thomas Jefferson, who also brought back a pasta machine.

So, where was the noodle dish invented that we know today as “Macaroni and Cheese”? Switzerland, of course!

The dish, known as “Älplermagronen” (=”Alpine herders’ macaroni“) in the German-speaking areas and “Macaroni du Chalet” in the French-speaking areas, is made with those Hörnli, also known as “Magronen”, which were dubbed for the horns of the cattle, sheep and goats which the herders tend. The cheese was often a local product from the milk of those very animals, and the dry pasta was easy to hike up to their summer chalets where they slept on the Alps during the summer grazing seasons.

For a good, long read about the history of the pasta, click here for a “BBC Travel” article on the topic – and get a good taste of the Swiss Alps in the meal! And be honest – how many of you have a hankering for Mac & cheese after reading this? Click on the image below for an authentic recipe.

Alplermagronen - Betty Bossi

Image credit: Betty Bossi (the Swiss version of Betty Crocker)

 

*Information source: Wikipedia, William Butcher (translation and introduction). Around the World in Eighty Days, Oxford Worlds Classics, 1995, Introduction.

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DIY Face Masks & Hand Sanitizer

Corona Jokes 16

Official Disclaimer…

I hope you’re all staying in, and staying safe! Once in a while, however, you may find that you need to go out for groceries and supplies. Studies have shown that a person touches their face 16 times per hour on average; so if you go out for an hour’s worth of shopping, you’ve probably touched your face several times; in the best of times, this is no big deal and we don’t even think about it (ask Mark Rober, below); right now, however, it could be lethal.

A great video that illustrates how germs spread in a fun, vivid way is by Mark Rober (NASA engineer involved in designing hardware on the Mars Rover) – check it out here.

With facemasks in short supply, and hand sanitizer as rare as hen’s teeth, we need to find solutions we can make at home.

Hand sanitizer is simple enough: Mix rubbing alcohol (or something with at least 60-70% vol. alcohol content) and a bit of aloe vera gel with a few drops of essential oil for scent. Make sure to keep your hands moisturized, too – washing your hands more than usual, and using alcohol-based products when out and about, will dry your skin out – and cracked skin will give another opening for germs to get in. The best way, as I’m sure you’ve all heard, is to wash your hands for 20 seconds; please turn OFF the water while you’re lathering up – don’t waste water! And since you’re soapy anyway, lather down the faucet before rinsing off your hands… cleaning two birds with one bath, so to speak.

Face masks can be a bit trickier, especially if you don’t sew. So I’ve rounded up a few simple ideas for DIY facemasks; some are with sewing, and some without; some with cloth and some are simply paper towels and a minute of folding. Keep in mind that these will not stop bacteria from getting through; they will simply keep you from touching your face while out in public, which will be better protection than nothing. Always remove face masks by the ear straps, not by the “muzzle”.

Just click on the images below to watch the link’s tutorial:

This is a simple 2-layered cotton mask, of which I’ve made a few already, with elastic earloops and a metal wire across the nose bridge; the wire can be a pipe cleaner, a bread wrap wire, or a thin piece of florist’s wire (a paperclip would also work in a pinch, though it will be less pliant):

Facemasks 2

This is a straight-edged, no-pleat, simple sewn mask with one tie at the back of the head, nose bridge wire, as well as an inner pocket to insert disposable filters; I made one today – it’s fast and simple:

Facemasks 3

This next mask is a no-sew solution using things you likely already have in your home, using a piece of cloth (T-shirt scrap, bandana, scarf or piece of cotton material of any kind), 2 rubber bands (either the office variety or a hair elastic band); as an added layer of protection, you could use a coffee filter tucked into the layers, too:

Facemasks 4

Facemasks 5

This last mask is the simplest – a one-use, cheap alternative – you could even draw a smiley face on the outside! All you need is a paper towel or two, a paperclip, tape, a stapler, and 2 rubber bands:

Facemasks - Easy No-Sew Shop Towel Mask - shortened edit

Stay safe, everyone! Look for the creative, the beautiful, the cheerful and the interesting in each day!

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Greetings from the Global Village

Depending on where you are in the world, right now you’re feeling the effects of our global village more or less than others. Here in Switzerland, the Corona Virus is headline news. We’ve had a few cases here – 43; the government has issued instructions on how to sneeze properly (into your sleeve “elbow” or into a tissue), to stay home when sick, and to cease greeting rituals (here, that would involve either hand-shaking, three kisses on the cheeks, or hugs). Gatherings of over 1,000 people have been banned – goodbye, sports fan sections and exhibitions. Below that number, lists of participants must still be kept to trace any spread to a patient zero. This includes our church; it was strange not to hug people, and to checklist who attended. It might be just a matter of time before facemasks are commonly worn in public (they’re sold out here, but I’ve yet to see someone wearing them in public).

The global village is also felt in the breakdown of the chain of supplies for goods; many shelves in our supermarkets are empty. If tin cans are made in some outback area of China that has now been quarantined by the Chinese government, then companies canning foods in Europe don’t get the wares they need to keep their factories running – as soon as one interruption happens, it breaks the steady flow. If enough shelves empty, people begin to panic and hamster supplies. Remember Y2K? The panic induced by the media, in the end, came to nothing. Yet the media are once again being panic mongers by continually focusing on this issue. What else is happening in the world? I have no idea, because the Corona Virus has taken over the world press. What I do know is that this is now the new reality; we’ll just have to get used to it and get on with our lives.

Flu girl-blowing-nose-illustration - Mayo Clinic, credit

Illustration credit: Mayo Clinic website

While I take all of this as seriously as it needs to be taken and find some of these measures sensible in any case of sickness, even the common cold, I am also a lover of history – so let me put the present crisis into a larger context:

  • The World Health Organization (based here in Switzerland, by the way) estimates that worldwide, annual influenza epidemics result in about 3-5 million cases of severe illness and about 291,000 to 646,000 deaths. That’s the old, run-of-the-mill flu, something that most of us, if not all, have had once (or even multiple times) in our lives.
  • The Covid-19 flu strain (known as the Corona Virus) is 10x likelier to be fatal.
  • The Spanish flu, which struck just after WW1 (and which is related to the Swine flu of 2009), killed an estimated 40-50 million (but could have been as high as 100 million). The common name is a misnomer: The reporting of the flu in Allied countries and in Germany was suppressed by wartime censors to avoid damaging already-low morale, but the newspapers were allowed to report cases in other countries, such as Spain. As a result, people thought the flu was heaviest there or had even begun there; thus, the common name. To put that in perspective of the Great War, the total number of military and civilian casualties in World War I is estimated to be about 40 million.
  • Going further back, the Black Death killed 50 million people in the 14th century (1346-53) – that was roughly 60% of Europe’s entire population at the time. It reset the economic and social structures, ending centuries of feudalism with its systems of lords, vassals and fiefdoms; it also killed off a disproportionate number of priests as they were infected while helping the sick (as well as the fact that they lived in closed communities). This necessitated a restructuring even of the church in some countries, opening the way for lay preachers and access to the Bible for common people (that’s a whole other topic).

These statistics shouldn’t induce panic; on the contrary: It shows us that life goes on. We should take precautions and practice sensible hygiene – washing hands when we come home from shopping or work, using hand disinfectant* when out, keeping distance as much as possible between ourselves and strangers when out in public, avoiding crowds of people, and avoiding physical contact with people outside the immediate family. But in the end, it is what it is; we can do what we can do, and no more. [* In case hand disinfectant is sold out in your area, you can make your own: Proportion into a pump or squeeze bottle 1/3-1/2 aloe vera gel (as close to 100% aloe vera as you can get), 2/3 rubbing alcohol or any alcohol with 60% vol. or more, and a few drops of essential oils for scent.]

How we respond to the present crisis will show our mettle; there’s no need to panic, to hoard, or to isolate ourselves behind closed doors. Hopefully, the current climate of raised awareness will linger; that it will teach people to consider others (I’ve lost count of the times I’ve been greeted with three kisses, only to be told after the fact that the other person is sick! I’d rather be warned and be able to have a choice in exposing myself or not, thank you very little…) and to generally adopt more hygienic practices even when sick with a common cold.

For me, far more important than the outward circumstances is the heart of a community that manifests itself in times of crisis. If we could look into individual communities in those past ages, we would almost certainly see people supporting others; groups who united to help the families affected. The human stories would most certainly be inspirational. There are numerous contemporary examples of natural disasters in which people have pulled together, whether locally or internationally, and helped the helpless. I can think of a dozen people in our church who would cook meals or run errands for those who are sick, and I’m sure there are far more people out there willing to step out of their own isolated, daily bubbles – and that’s where such a crisis becomes a blessing to communities, in the long run.

 

 

 

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History Undusted: Bubble Wrap

I do a lot of crafts. I mean, a lot variety-wise, and a lot quantity-wise. When I’m not writing, managing our household, planning meetings or teaching students (I’m a vocal coach and an English teacher for adults), I’m usually doing some kind of craft, and it more often than not involves some form of upcycling – turning “trash” into “treasures”. Recently, I’ve been making sheets of plastic-confetti-filled bubble wrap, ironed into what’s known as “ploth” (plastic cloth). These can then be sewn into bags, etc. It got me to thinking about just how bubble wrap came to be. I have tons of the stuff, stashed here and there in the craft room, for such projects – and I’m constantly on the lookout for creative uses for that poppable fun.

Did you know that originally it wasn’t intended as packing material but as wallpaper? In 1957, Swiss chemist Marc Chavannes and his business partner, Alfred Fielding, wanted to make a wallpaper that would appeal to the emerging Beat culture [for those of you unfamiliar with that term, it was a generation of post-war, anti-establishment rebels who were more or less the precursor to the 60’s hippie and counterculture movements]. What the partners did was simple enough: They put two layers of a plastic shower curtain through a heat-sealing machine. But it came out in what they first saw as a failure, with air bubbles trapped between the two layers. They figured they were onto something, failure or not, and so they got a patent and then began experimenting to find other uses. Wallpaper wasn’t popular; neither was their suggestion to use it as insulation for greenhouses (perhaps that was simply a matter of marketing to the wrong demographic). Then, around 1960, IBM began shipping their newly-designed 1410 computers and needed a way to protect the delicate dinosaurs – eh, I mean, computing mammoths. That’s a LOT of bubble wrap. The rest is, as they say, history. And in case you’re wondering, yes, people have been popping the bubbles from the beginning, just for fun. So much fun, in fact, that the last Monday of every January is officially “Bubble Wrap Appreciation Day”.

Click on the image below to watch an IBM recruiting film (1 minute), from 1960. You can also see one of IBM’s massive scientific mainframes being used by the original “computers” of NASA in the film “Hidden Figures“.

IBM 1401 unit - History of Computer Museum archive photo

IBM’s 1410 computer promotional photo, 1959. Credit, Computer History Museum archives

 

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Seeds, Pits, Pips or Stones?

If you’ve hung around here for any length of time, you know that my curiosity likes to sprint down obscure paths. I recently finished the first draft of my next novel (Woohoo! Now the real work ahead!), and one of the things I was researching was something I wanted to write but then hit that proverbial wall: Do I use pit or seed in this context? And what’s the actual difference between the two, or are they interchangeable? And where does stone or pip come in?

Well, as with any roadsign to curious paths, I pulled out my walking stick – or in this case, the dictionary (as in, Wiktionary). And as you’ll see, just looking it up won’t do – I had to learn a wee bit about botany along the way:

Peach Pit Anatomy

Anatomy of a Peach. Image Credit: http://www.pngfuel.com

Endo- means within, inner, absorbing, or containing. Peri- means peripheral, or surrounding; Meso- means middle (as in Paleolithic, Mesolithic, Neolithic); Exo- means outer (as in exoplanet); and -carp means part of a fruit or fruiting body. I tend to remember something better if I can make a linguistic leap of understanding, and the suffix carp- actually comes from the Greek word Karpos, which was the mythological son of the west wind and spring (new vegetation), which naturally includes fruit.

In this instance, however, the dictionary wasn’t exactly helpful:

SEED: A fertilized and ripened ovule*, containing an embryonic plant. [*the structure in a plant that develops into a seed after fertilization.]

I don’t know about you, but I found myself none the wiser.

PIT is even more confusing! It’s a seed, stone or pip inside a fruit, or a shell in a drupe (such as a peach) containing a seed.

PIP makes the issue even foggier: It’s a British term for a seed inside certain fleshy fruits (compare stone/pit), such as a peach, orange, or apple!

STONE seems the clearest definition (insert sarcastic tone here): The central part of some fruits, particularly drupes; consisting of the seed and a hard endocarp layer.

If I had to put it in layman’s terms, I’d say it like this: The seed contains the embryo; the pit/pip/stone protects the seed until it’s ready to sprout (and only certain types of fruits have pits); pits are usually singular in a fruit, while there may be one or more seeds.

Pits are found in fruits like cherries, mangoes, peaches, plums, avocadoes, olives and dates. Seeds are found in fruits like apples, oranges, and bananas (the variety of bananas usually sold in stores usually have sterile seeds – what we might call “seedless”). If I can follow this jungle-infested side path for a moment, did you know that bananas don’t actually grow on trees, but are the world’s largest herb, and that they grow upside-down, defying gravity? Another interesting point is that a seedless banana can still propagate itself – I should rather refer to it as clone: Each” tree” (i.e. layers of leaves) produces 1 bunch of fruit and then dies; but its rhizome, below ground, simply sprouts up as the one is dying and repeats the process.

Then there’s the hairy issue of the coconut: Technically, it’s a one-seeded drupe; but it could be considered a fruit, a nut, or even a seed. When you buy a coconut in the store, the outer layers have generally been stripped off: The exocarp is usually green; the fibrous husk beneath that is the mesocarp, and the hard, woody layer we often think of as “a coconut” is actually the endocarp. Every part of the coconut and the palm plant (not tree) on which it grows can be used for something, so it’s often referred to as “the tree of life”.

And let’s not get into figs; they’re technically inverted flowers, and besides, there’s probably a wasp inside there (without the fig wasp, we’d have no figs). Now ya know. Don’t look into that too closely unless you really want to know, because you’ll never look at a fig the same way again.

Learn something new and get smarter every day!

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How It’s Made: Rubber Bands

Rubber bands are ubiquitous; everyone has them and occasionally uses them. They come in nearly every shape and size; they’ve even become a craft accessory out of which creative shapes can be formed (just google “rainbow loom designs”).

But have you ever stopped to think about how they’re made? Are they made from natural or synthetic materials? You might be tempted to think that they’re some kind of plastic or silicone, but most rubber bands are made out of the sap of rubber tree plants; that sap, specifically, is latex. Trees are “tapped” – a slice of bark removed – every two days, and the latex gathers in bowls attached below the cut. It will flow for an hour or two and then heals over.

The actual process to turn rubber latex into uniform rubberbands is a complex one; it’s a process that evolved over time, trial, and error into a well-oiled machine – literally. To learn more, click on the following links:

Alliance Rubber Company – The birthplace of the modern rubber band

YouTube: How It’s Made

As with anything, we should take care to use what we buy, and buy what we’ll use. Rubber bands are produced by the millions each day (the factory featured in the YouTube video produces 40 million per day), so use the ones you have wisely!Rubber band ball If you’re curious as to how to make a rubber band ball like this image, just click here. I have several of these around the house, and they’re practical and easy to make. Enjoy!

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Science Undusted: Prince Rupert Drops

Let’s talk about shattering glass. As one does.

Probably as far back as molten glass was first produced intentionally by man (i.e. not volcanic glass drops formed naturally, which are known as Pele’s tears) drips of molten glass fell into the glass blower’s water, kept nearby to cool the glass products in. Sometimes, these drops have particular strength, and these alone are true Prince Rupert Drops.

The English name is a classic example of who knew who, and who wrote the history books: The drops had been made Mecklenburg, northern Germany, since 1625, though some think they go back as far as the days of the Roman Empire; they were sold around Europe as toys or curiosities. In 1660, Prince Rupert brought some of them back to London as a gift for King Charles II, who then gave them to the Royal Society to investigate and attempt to reproduce. Thus, Rupert’s name has gone down in history – for bringing back a souvenir for the right person.

Their unusual strength comes from how they cool; when done right, they will come out shaped like a tadpole with a long, thin tail. The heads can be struck with a hammer or shot with a gun, and they will not shatter; but if the tail is knicked or disturbed, the entire drop shatters into glass dust instantly, from the tail down.

Not all drips of glass cooled in water produce Prince Rupert Drops, also known as Dutch tears, Prussian tears, or Batavian tears; the difference is their behaviour and is probably influenced by impurities or inclusions in the mineral composition of the material used. Higher quality glass produces pure Prince Rupert’s Drops; low quality may simply not have the tension created in the cooling process to be a shattering success. I have a drop of molten glass, found on a beach in the Scilly Isles (UK); it is the result of a shipwreck from around the 17th or 18th century, and the drop is full of the impurities of the orginal glassware plus black flecks of cinders from the burning ship. The tail was snapped off over time, yet the head survived – thus, it was not a Prince Rupert Drop.

For a cool video that explains the science behind the drops, including slow motion analysis of the shattering, just click on the image below; the video is from one of my favourite YouTube channels, Smarter Every Day. For further behind-the-scenes footage of another experiment that Destin did with these drops, click here.

Prince Rupert Drop

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10 Natural Phenomena

Whenever I have a few minutes in my schedule, I like to fill it with something interesting; if I’m eating lunch, I’m probably watching a documentary or a video about a particular topic. So I thought I’d toss together a shortlist of natural phenomena that are out there somewhere on our unique and diverse planet. Just click on the links below to learn more – the links will lead you to either a YouTube video or an article. So, here ‘goes!

  1. The Sahara Eye: Also known as the Richat Structure, it is a fascinating geological structure that’s best seen from lower orbit (located at 21.1269° N, 11.4016° W). Because of its concentric circular formations, there have been many claims that it was the fictional Atlantis of Plato’s writings. While the reasoning the supporters of that theory are interesting to me as a novelist, the scientific explanation is fairly straight forward.
  2. Spotted Lake, Canada: This lake has no run-off, which means that water flowing into the lake only leaves through evaporation. Divots in the lake have grown into spotted pools which attract various minerals as snow melt-water enters the lake. The Native tribes used these pools as therapy for physical ailments in a time before modern medicine, just like people in 18th century England went to Bath to drink and bathe in the mineral waters there. On Google Earth, its coordinates are 49°04’40.86″N 119°34’03.01″W; if you use the historical toggle, you’ll see the individual pools more clearly.
  3. Floating Eye Island, Argentina: This is a relatively new discovery from 2016, located at 34°15’07.8″S 58°49’47.4″W. It was discovered by Argentinian film director Sergio Neuspillerm, who was looking for a location to film a horror film and came across the Google map image of this unusual lake; because of his bent toward the purpose of this place, most “reports” have leaned toward the paranormal, and it was difficult to find a serious scientific report on the phenomenon. The actual interpretation is probably simply a combination of geology, botany and hydrodynamics: The lake produces methane gas, and if the floating island of debris and grasses growing atop the fertile strata get pushed around by methane bubbles rising, it will naturally knock off the rough edges of the floating patch and the land it bumps into, creating a circular “island”.
  4. Ice Discs: Similar to the Eye, these rotating discs of ice form in freezing water which is moving slowly; they usually form in eddy currents, where the accelerating water creates the effect called “rotation shear”, breaking off a chunk of ice and twisting it around; the process grinds off the rough edges, leaving a round disc of rotating ice. This disc grows as it cools the water around it and attracts more ice into its vortex.
  5. Sailing Stones, Death Valley, California: For years, people have observed the evidence of large boulders sliding across the surface of Racetrack Playa in Death Valley National Park. The explanation may be relatively simple, but sometimes people just like a mystery.
  6. Fairy Rings/Pixie Rings: These are caused by the processes of the mycelium of fungi, as it spreads outward in a circle while looking for nutrients. Before scientific understanding came along, of course, these were thought to be portals to the magical realms of pixies or fairies and were convenient scapegoats for anything bad happening in a nearby town or village.
  7. Since we’re on the topic of circles, what about the Namibian Fairy Circles? There are conflicting hypotheses about their origins, but the most recent study has discovered that beneath the bare circular patches of earth, distributed evenly over some 1100 miles of the Namib Desert, are colonies of termites. They eat the roots of the plants growing above their territory, removing the competition for the limited rainfall and allowing the water to go directly into the soil above their colony. It’s a complex ecosystem, but scientists are slowly beginning to understand it. In the meantime, the locals just call them the “footprints of the gods”.
  8. Blood Falls, Antarctica: A waterfall in Antarctica flows blood red, caused by the iron-rich waters hitting oxygen and turning to rust. The symbiosis of microbes living in that subterranean water source is the stuff good science fiction is made of.
  9. The Everlasting Storm: Catatumbo Lightning Storm, Venezuela: This lightning storm occurs during 140-160 nights per year, and lightning flashes up to 280 times per hour. Located over the mouth of the Catatumbo River as it empties into Lake Maracaibo, it has become so famous and so persistent that it is even featured in the flag and coat of arms of Zulia, the state which contains the lake, and is mentioned in the national anthem of Venezuela.
  10. Red Crab Migration, Christmas Island: Christmas Island is an Australian external territory in the Indian Ocean, and on this 135 sq km (52 sq mi) patch live literally millions of red land crabs, found only on this island. To spawn, the females make their way down to the beach at high tide to release their eggs into the ocean – at the risk of drowning, as they are not aquatic. The eggs will hatch, and the tiny crabs will eventually return to the island. During this mass migration, the island slows down and makes way for the red river flowing over its streets, stairs, and anything else between the crabs and their goal.
Christmas Island Crab Migration

Baby crabs returning to Christmas Island

 

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