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It takes a little sleuthing to deduce that the iconic phrase “elementary, my dear Watson” never actually appears in any of the original Sherlock Holmes books. This oft-repeated misquote is generally believed to be what Holmes said to his trusted assistant, Dr. John Watson, when explaining how he’d solved a crime. But Sir Arthur Conan Doyle — who created the character of Sherlock Holmes and penned all the original stories — never wrote those four words in that exact order. The closest instance can be found in the 1893 short story “The Adventure of the Crooked Man,” where the phrases “my dear Watson” and “elementary” appear 52 words apart. The line “exactly, my dear Watson” is used in 1904’s “The Adventure of the Missing Three-Quarter,” but that too falls short of the famous quote.

Darth Vader never said, “Luke, I am your father.”

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One of the most common movie misquotes comes from the 1980 “Star Wars” film "The Empire Strikes Back." During a climactic confrontation between Luke Skywalker and Darth Vader, Vader says the line, “No, I am your father,” but does not address Luke by name.

The reason “elementary, my dear Watson” came to be associated with Holmes likely has to do with the phrase popping up in various newspapers, novels, and films in the early 20th century when referencing Doyle’s character, who had already become a fixture of pop culture by that point. An exact match for the line, and perhaps the earliest example, appears in a 1908 edition of The Globe and Traveller in an article about a sleuthing legal counsel. The phrase was later penned in a 1915 book by P.G. Wodehouse titled Psmith, Journalist, as well as in Agatha Christie’s 1922 novel The Secret Adversary. And the 1929 film The Return of Sherlock Holmes ends with the line, “Elementary, my dear Watson, elementary.” All these instances, and many more, have made it impossible to separate the quote from the character, despite it never appearing in Doyle’s original oeuvre.

Numbers Don't Lie

Numbers Don't Lie

Year the character Sherlock Holmes first appeared in print
1887
Weeks it took Doyle to write his first Sherlock Holmes novel
3
Sherlock Holmes’ fictional apartment number on Baker Street
221B
Films starring Basil Rathbone as Sherlock Holmes
14

Sherlock Holmes’ archnemesis was named ______.

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Sherlock Holmes’ archnemesis was named James Moriarty.

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Sherlock Holmes was based on a real-life surgeon.

Though the name “Sherlock Holmes” is entirely fictional, the character’s mannerisms were partially modeled after a real surgeon named Joseph Bell. While attending medical school at the University of Edinburgh, Arthur Conan Doyle took classes under Bell, who was said to possess an inherent ability to diagnose various diseases. He was also known for studying a patient’s appearance and making educated assumptions about their personal lives, such as their occupation.

Doyle drew inspiration from these traits as he conceived of Sherlock Holmes — a character renowned for deducing answers to complex mysteries through simple observation. In 1892, five years after the first Sherlock Holmes story was published, Doyle wrote a letter to Bell saying, “It is most certainly to you that I owe Sherlock Holmes.”

Bennett Kleinman
Staff Writer

Bennett Kleinman is a New York City-based staff writer for Optimism Media, and previously contributed to television programs such as "Late Show With David Letterman" and "Impractical Jokers." Bennett is also a devoted New York Yankees and New Jersey Devils fan, and thinks plain seltzer is the best drink ever invented.

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There's nothing silly about a broken bone, but if laughter is the best medicine, then the creators of Silly String may well have helped more people than they ever envisioned. In the 1960s, inventor Leonard A. Fish and chemist Robert P. Cox set about producing a mixture that would rapidly harden after delivery via a spray can, providing a near-instant cast for anyone unfortunate enough to sustain a broken limb. They came up with a sticky concoction that set quickly and held, then tested some 500 nozzles in search of the best application from a pressurized can. When one nozzle propelled a stream 30 feet across the room, Fish and Cox had another idea — maybe this stringy goo would work better as a plaything?

A New Jersey town has banned the public use of Silly String.

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While some communities, like Beverly Hills, have enacted temporary bans for Halloween, the New Jersey town of Ridgewood strictly prohibits “the discharge of a product called ‘Silly String’ in or along the public streets, sidewalks, parks, or public places … at any time.”

After tweaking their recipe, the duo arranged a meeting with an executive at Wham-O, the company behind such popular toys as the Frisbee and Hula Hoop. At first, a business relationship seemed unlikely; overeager to demonstrate, Fish and Cox all but decorated the office with loads of colorful string, and were unceremoniously shown the door. Fortunately, the company's owners later spotted some leftover gunk and were intrigued enough to seek a larger sample. The next day, Fish and Cox received a telegram from Wham-O requesting 24 cans of the stuff for a market test. By 1972, when a patent was granted for this "foamable resinous composition," Silly String had clearly moved on from its roots as a tool for healing and was well on the way to its destiny as a mess-making accoutrement for partygoers of all ages.

Numbers Don't Lie

Numbers Don't Lie

Miles of string advertised on early Silly String labels
.25
Canisters of Silly String handed out at a baseball game in 2017
4,025
Maximum temperature (in degrees Fahrenheit) suggested for safe Silly String storage
120
Year the Car-­Freshner Corporation acquired the rights to Silly String
1997

75% of the liquid inside a can of Silly String comes from its ______.

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75% of the liquid inside a can of Silly String comes from its propellant.

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Silly String is used by the military to detect booby traps.

Although Fish and Cox chose the path of entertainment for their creation, they may have been heartened by news of a real-world application that fulfilled their original goal of helping people. As far back as 1997, the U.S. military used Silly String to weed out the presence of dangerous improvised explosive devices (IEDs) in hostile areas. A spritz of the stringy stuff is light enough to drape across nearly invisible trip wires without setting them off, calling attention to these deadly traps often nestled in doorways and gates. While the military has been quiet about publicizing this use, the revelation of its effectiveness prompted one mother, whose son was stationed in Iraq in the early 2000s, to collect 80,000 cans of Silly String and nearly identical products to send overseas to aid the war effort and save a few more lives.

Tim Ott
Writer

Tim Ott has written for sites including Biography.com, History.com, and MLB.com, and is known to delude himself into thinking he can craft a marketable screenplay.

Original photo by Raul C/ iStock

Globe-trotters who spend time in Turkey can find many ways to indulge their taste buds: rich and foamy coffees, juicy kebabs, and crispy baklava filled with nuts and honey. Then there’s dondurma, or what some call Turkish ice cream, a warm-weather delight that’s served in a cone but has one not-so-frosty feature: It doesn’t melt.

Vanilla beans aren’t really beans.

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Real vanilla extract — not the imitation stuff made from synthetic flavoring — is produced by vine-growing vanilla orchids now found primarily in Madagascar. The “beans” they produce aren’t really beans, but instead pods that contain thousands of tiny seeds.

Like most ice cream, dondurma is a dairy-based confection, in this case made from goat milk and sweetened with sugar. However, it has two additional ingredients that give the dessert its unique texture and anti-melting properties: salep and mastic, both harvested from plants native to Turkey. Salep is a type of flour made from the bulbs of wild purple orchids that grow throughout the country; it’s also used in a hot and milky regional drink that goes by the same name. The powder gives dondurma its thickness and helps keep it from melting. The second ingredient, mastic, is a natural resin extracted from the region’s mastic trees and has long been used as chewing gum. The thick and heat-resistant substance looks like sap and has a light cedar flavor. It also gives dondurma its chewy texture.

Unlike other ice cream, dondurma isn’t churned, and is instead created more like taffy. Stretching and beating the ingredients together over and over again — much like kneading dough to activate stretchy wheat gluten — gives the ice cream its elasticity. Although it can’t melt, dondurma is still kept frozen, then scooped into cones or bowls as a summertime snack — a recipe that’s been satisfying sweet tooths for possibly 500 years.

Numbers Don't Lie

Numbers Don't Lie

Amount of ice cream (in gallons) eaten by the average American each year
4
Amount of ice cream (in pounds) used to build the world’s largest ice cream cone
1,000
Height (in feet) of Turkey’s Great Ararat mountain
16,945
Estimated number of orchids harvested in Turkey each year for salep
120 million

More ______ are grown in Turkey than in any other country.

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More hazelnuts are grown in Turkey than in any other country.

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Scientists don’t fully understand why “brain freezes” happen.

“Brain freeze” is much easier to pronounce than “sphenopalatine ganglioneuralgia,” the term scientists use to describe the uncomfortable and sudden headache caused by consuming cold foods and drinks too quickly. Brain freezes aren’t at all life-threatening, though it’s not entirely clear why they happen — the working theory is that sudden cold sensations cause the blood vessels in our mouths and throats to momentarily narrow and constrict blood flow. When the vessels quickly widen again, the fluctuation triggers pain receptors in the face and head. Some scientists believe the pain is one way our brain protects itself, warning us to stop what we’re doing to keep a continuous supply of blood and oxygen going at all times. However, not everyone experiences this sensation, and researchers aren’t sure why; studies show that less than half of people get brain freezes, though people who are prone to migraines are more likely to experience the unpleasant response.

Nicole Garner Meeker
Writer

Nicole Garner Meeker is a writer and editor based in St. Louis. Her history, nature, and food stories have also appeared at Mental Floss and Better Report.

Original photo by ben44/ Shutterstock

There’s a reason orcas are better known as killer whales. They’re fierce predators, and they don’t always keep to the water in search of prey — in fact, they’ve even been known to hunt moose. This happens when a member of the largest deer species (yes, moose are deer) wades into the water, either in search of food or to elude land-based predators, and finds itself in the unfortunate position of being near an orca, which will eat pretty much anything. Such occurrences have been known to happen in the Pacific Northwest and Alaska, with one recorded incident resulting in the deaths of two moose.

Orcas belong to the dolphin family.

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They are the largest member of the dolphin family. They're still whales, however, as all dolphins are whales.

Orcas are thought to have received their nickname centuries ago, perhaps from a mistranslation. The theory posits that Basque fisherman observed them killing other whales and referred to them as “whale killers,” which became “killer whales” when translated to English. Their diet depends largely on where they live, but different ecotypes feed on everything from fish and seals to sharks and squid, with the occasional moose thrown in.

Numbers Don't Lie

Numbers Don't Lie

Maximum years an orca can live
90
Months in an orca’s gestation period
~17
Box-office gross of 1993’s “Free Willy”
$153.7 million
Miles an orca can travel in one round-trip migration
7,000

Killer whales’ Latin name is ______.

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Killer whales’ Latin name is Orcinus orca.

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No one knows why orcas keep attacking yachts.

If you’ve read about killer whales in the last few years, it’s probably because they keep sinking yachts. There have been incidents in Cape Finisterre as well as the Strait of Gibraltar, with at least 500 orcas encountering boats since 2020. (Most of these go no further than the whales merely approaching the vessels, perhaps out of curiosity, but a number of them have resulted in sunken boats.)

Scientists remain unsure about the whales’ motivations. Some think they’re merely having fun or even participating in a fad, which is apparently something killer whales do — for instance, one pod spent the summer of 1987 wearing dead salmon on their heads. Others believe it’s because they’ve had negative experiences with boats in the past, including losing members of their species to the vessels. Whatever the case, the creatures don’t seem to have personal beef with the humans onboard; there have been zero recorded cases of an orca killing a human in the wild.

Michael Nordine
Staff Writer

Michael Nordine is a writer and editor living in Denver. A native Angeleno, he has two cats and wishes he had more.

Original photo by pabradyphoto/ iStock

Every state has an official bird or tree, but only one state’s governor has declared a state monster. Washington state is home to some impressive forests, and it’s within these misty woods that a legend has grown about an apelike man known as Bigfoot or Sasquatch (sasq'ets means “hairy man” in the Halq'emeylem language of British Columbia). The myth of the Sasquatch began centuries ago with West Coast Indigenous peoples, and gained steam in the 19th century when British explorers (allegedly) discovered “Sasquatch prints” during explorations of the Columbia River. However, the modern legend really kicked into high gear in 1958, when a journalist for the Humboldt Times in northern California pondered if a set of mysterious footprints, mentioned by a reader, could be a relative “of the Abominable Snowman of the Himalayas.” Almost a decade later, the famously grainy video shot in Bluff Creek, California — known as the Patterson-Gimlin film (named for its creators) — cemented the iconic status of this hirsute creature.

Washington state is home to the highest peak in the contiguous U.S.

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Mount Whitney in California is the highest peak above sea level, at 14,494 feet. Washington’s Mount Rainier is third on the list, following Colorado’s Mount Elbert in second place.

Today, Bigfoot’s image can be found throughout the Pacific Northwest, emblazoned on festival signs and gift shop tchotchkes. In 1970, Washington’s governor issued a proclamation declaring Sasquatch the state monster of Washington; he even affixed a lock of the legendary monster's supposed hair to the document. (The proclamation also deemed “all Sasquachii” a protected state resource.) More recent endeavors, in 2017, attempted to solidify that official status when state Senator Ann Rivers introduced bill SB 5816, calling for Sasquatch to become the state’s official monster. The bill was referred to committee but has yet to be signed into law, which means that for now, the Sasquatch’s official status — much like the creature itself — remains elusive. 

Numbers Don't Lie

Numbers Don't Lie

Percentage of U.S. citizens who believe Sasquatch is real, according to a 2022 poll
13%
Times Sasquatch has been spotted in Washington state, per the Bigfoot Field Researchers Organization
700+
Height (in feet) of Gigantopithecus blacki, an ancient giant ape that once lived in Southeast Asia
10
Length (in feet) of Washington’s Evergreen Point Bridge, the world’s longest floating bridge
7,708.49

Mythic animals such as the Sasquatch and yeti are known as ______.

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Mythic animals such as the Sasquatch and yeti are known as cryptids.

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Washington state is also the birthplace of the modern UFO craze.

The Pacific Northwest is well known for its cryptids, but this region of the U.S. also birthed another realm of paranormal fascination. On June 24, 1947, a fire extinguisher salesman named Kenneth Arnold flew past Mount Rainier in his single-engine CallAir plane, en route to an air show, when he spotted something out of the ordinary — nine metallic discs whose trajectory appeared to defy known physics. Days later, Arnold told the story to two reporters at the East Oregonian newspaper, using phrases like “pie pan,” “disk,” and the now-familiar “saucer.” One of the reporters wrote a story for the Associated Press wire service, and by the afternoon, the nation was abuzz with the possibility of unknown “flying saucers” hovering above the U.S. A month later, allegedly extraterrestrial events at Roswell, New Mexico, fanned this smoldering craze into a full-blown blaze. Although Arnold at one point lamented his role in this “flying saucer” obsession — he often found himself the subject of ridicule — later in life he saw his otherworldly report as a necessary patriotic duty, saying: “If I had not reported it, it would have constituted a disloyalty to my country. Wouldn’t you think so?”

Darren Orf
Writer

Darren Orf lives in Portland, has a cat, and writes about all things science and climate. You can find his previous work at Popular Mechanics, Inverse, Gizmodo, and Paste, among others.

Original photo by Anusorn Nakdee/ Shutterstock

In Greek mythology, a chimera is a part-lion, part-goat, part-snake, all-weird monstrosity, but in scientific circles, the name takes on a different meaning. In biology, a chimera is anyone whose body contains genetically distinct cells. This doesn’t mean that another small organism is living within you, but rather that cells wholly different from your cells coexist within you. In fact, a kind of chimerism is fairly common. New mothers carry some of the cells of their offspring, which can remain within their body for up to 40 years. This exchange of cells is also a two-way street, as children often contain some of their mother’s cells, which cross the placenta and into the child’s bloodstream during pregnancy. However, not many cells reside in a mother and her offspring, so scientists refer to this phenomenon as “microchimerism.” 

A person with two different-colored eyes is a chimera.

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While a person with two distinct eye colors may be a chimera, there are many ways for this phenomenon to occur. Sometimes, family DNA, trauma, disease, injury, and other forms of genetic mutation can affect the pigment, or melanin, that determines eye color.

A more dramatic form of human chimerism is when two embryos that would usually form nonidentical twins instead fuse in the womb, and the resulting single embryo contains cells of both. While this can have some outward effects (like different-colored patches of skin on one person), most of the time this condition is only discovered through genetic testing. In one bizarre case in 2003, a 52-year-old mother needed a kidney transplant, and when her children were tested for compatibility, the results showed that two of her three children were not hers genetically. This is because she was a chimera, having fused with her twin embryo before birth, and the doctors didn’t think to search for a second genetic marker in other parts of her body. That makes this confused mother only 1 out of 100 or so confirmed chimera cases worldwide, but many, many more are likely out there.

Numbers Don't Lie

Numbers Don't Lie

Year scientists created the first human-pig chimera for transplantable organs
2017
Number of lines in Greek poet Hesiod’s “Theogony,” which contains a detailed description of chimera
1,022
Year the first case of a natural human chimera was reported
1953
Average number of cells in an adult human female (men contain 36 trillion cells on average)
28 trillion

In the “Iliad,” Homer mentions the slaying of the mythical chimera by the Greek hero ______.

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In the “Iliad,” Homer mentions the slaying of the mythical chimera by the Greek hero Bellerophon.

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Many of the foods we eat come from chimera plants.

Chimeras aren’t confined to the animal kingdom; many of the fruits and vegetables we consume are chimeras or bud sports. Chimeras are when an organism contains two distinctly different tissues, whereas a bud sport is a singular genetic deviation from the rest of the plant, often caused by a spontaneous mutation. The effects of chimerism can be seen clearly in apples, which originated from Eurasia, but in which different overlying tissues produce alteration in the color of the fruit’s skin. This widespread chimerism likely originated from ancient farmers, who “often grafted fruit-producing branches onto another variety or species,” in the words of New Scientist. In fact, humans have been modifying plants in this way — and enjoying the fruits of their efforts — for thousands of years.

Darren Orf
Writer

Darren Orf lives in Portland, has a cat, and writes about all things science and climate. You can find his previous work at Popular Mechanics, Inverse, Gizmodo, and Paste, among others.

Original photo by Raisa Nastukova/ iStock

We tend not to think of America as a very “old” country, at least in comparison to many others. The United States as a society is still fairly new, but of course, its natural surroundings are comparable in age to those of any other place on the planet — and in some cases, they’re even older.

Case in point: The oldest known forest in the world is in Cairo, New York, roughly 125 miles north of New York City. At 385 million years old, the Cairo fossil forest was discovered near an abandoned quarry in 2009. The actual trees are no more (hence its name), and it’s believed that a massive flood led to their demise — the site even contains fish fossils. “You are walking through the roots of ancient trees,” paleobotanist Chris Berry told Science when discussing the discovery. “Standing on the quarry surface we can reconstruct the living forest around us in our imagination.”

The world’s largest forest is in just one country.

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At some 2.3 million square miles, the Amazon rainforest is the largest forest in the world. More than half of it is in Brazil, but it also extends across Bolivia, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, and Venezuela.

The fossilized roots there are thought to belong to Archaeopteris, an extinct genus of tree characterized by woody roots and branches with fernlike, fan-shaped leaves. Prior to the site’s discovery, the oldest Archaeopteris fossils were a mere 365 million years old. Forests such as this one were hugely consequential, as they pulled CO₂ from the atmosphere, raised oxygen levels, and led to the evolution of huge insects that resided within them.

Numbers Don't Lie

Numbers Don't Lie

Trees in the world
3.04 trillion
Amount of land covered by forests globally
1/3
Percentage of forests that are publicly owned
73%
Trees that are cut down every year
15 billion+

The world’s most forested country is ______.

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The world’s most forested country is Russia.

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More than half of the world’s forests are in five countries.

With 815 million hectares of forested land, Russia accounts for a full 20% of all the forests in the world. Four other countries account for another 34%, meaning the five of them contain 54% of all forests across the globe. Those other countries are Brazil (497 million hectares), Canada (347 million), the United States (310 million), and China (220 million). It’s probably not a coincidence that those are also the world’s five biggest countries by area (though not in the same order). On the other end of the spectrum are countries such as Monaco, Oman, Egypt, and Mauritania, which have no forest coverage at all.

Interesting Facts
Editorial

Interesting Facts writers have been seen in Popular Mechanics, Mental Floss, A+E Networks, and more. They’re fascinated by history, science, food, culture, and the world around them.

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You can send a lot of things in the mail, but you can’t send a person — at least not anymore. There was nothing preventing people from mailing their own children in the early days of the U.S. Postal Service’s parcel post service, though, and at least seven families took advantage of it. That includes the Beagues, an Ohio couple who in 1913 paid 15 cents in postage to mail their newborn son to his grandmother’s house a mile down the road. Beyond the novelty of it — when the parcel post service began on January 1, 1913, some were eager to see which packages they could get away with sending — it was a surprisingly practical way of getting one’s kiddo from point A to point B.

A pizza has been delivered in space.

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It happened in 2001, when Pizza Hut struck a $1 million deal to deliver a pizza to the International Space Station. Russian cosmonaut Yuri Usachov accepted the delivery, which substituted salami for pepperoni because it withstood conditions better.

To start with, many people in rural areas knew their postal carriers fairly well, which meant the children were simply walked or carried on often-short trips. In other instances, children traveled on trains as Railway Mail, but with stamps instead of (usually more expensive) train tickets. The longest known trip of a child through the mail occurred in 1915, when a 6-year-old was sent 720 miles from Florida to Virginia — a lengthy trip that cost just 15 cents. Fortunately, there are no reports of children being injured by being sent through the mail. (Pictures of children in literal mailbags were staged.) The practice ended, as so many do, when certain higher-ups became aware of the loophole and decided to close it, also around 1915.

Numbers Don't Lie

Numbers Don't Lie

Addresses served by the U.S. Postal Service
163 million+
Pieces of mail sent through the USPS per day
425.3 million
Cost of a Forever Stamp as of February 2025
73¢
Retail post offices in the U.S.
31,123

The first postmaster general was ______.

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The first postmaster general was Benjamin Franklin.

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The world’s oldest working post office is in Scotland.

First opened more than three centuries ago, the Sanquhar Post Office is the oldest working post office in the world. It’s been serving the people of Sanquhar, Scotland, since 1712 — just five years after Scotland and England unified. It remains popular among tourists, who enjoy having their letters marked with a “World’s Oldest Post Office” stamp. The future of the site was briefly in doubt when the previous owners decided to retire, but new owners took over in 2023. The Sanquhar post office predates the entire United States Postal Service by 63 years; the USPS was established by the Second Continental Congress on July 26, 1775.

Michael Nordine
Staff Writer

Michael Nordine is a writer and editor living in Denver. A native Angeleno, he has two cats and wishes he had more.

Original photo by Vicki L. Mille/ Shutterstock

When is a goat not a goat? When it can be spotted on a rail-thin rock crevasse at an altitude of 13,000 feet in the northwestern United States and Canada. That animal, while seemingly possessing the stubbornness attributed to the goats found at petting zoos, is actually the biologically distinct mountain goat, the lone extant species of the genus Oreamnos.

You can tell a mountain goat's age by counting the rings on its horns.

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As with trees, mountain goats reveal their ages by the rings that appear on their keratinized horns. No rings materialize during their first winter, but they emerge in each successive year after that.

While related to domestic and wild goats within the Bovidae family, mountain goats belong to the Rupicaprini tribe, a subdivision of "goat antelopes" that includes fellow rock-climbing creatures such as the goral and chamois. Anatomically, rupicaprids differ from other bovids by featuring short, dagger-like horns atop thinner, lighter skulls. Mountain goats have also developed specific features that would feel strange to their cousins in the petting zoo, namely the thick, double layer of fur and suction cup-like hooves that allow them to survive in cold, treacherous environments.

Behavior-wise, male mountain goats are more deferential to females than their domestic cousins. They're also far less likely to engage in the sort of head-butting waged between playful kids and competing rivals among true goat herds, due to the potential for injury from those sharp horns. But lest you think these animals suffer from a courage deficiency, just think about how brave you'd be leaping between cliffs more than 2 miles above sea level.

Numbers Don't Lie

Numbers Don't Lie

Lifespan (in years) of the typical wild mountain goat
9-12
Weight (in pounds) reached by the largest male mountain goats
300
Distance (in feet) a mountain goat can jump in a single bound
12
Number of studio albums released by the Mountain Goats
21

A group of mountain goats is called a ______.

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A group of mountain goats is called a band.

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Mountain goats enjoy refreshing themselves with human urine.

Most guides will advise keeping a safe distance from mountain goats, but sometimes the animals get a little more close and personal than we’d like. That’s what started happening in Washington’s Olympic National Park, where the ever-growing mountain goat population developed a taste for the salt in human urine and sweat. Although it can make for a fun campfire story or blog post, a brush with these normally elusive wild animals can be dangerous. Furthermore, the increasingly emboldened creatures have been found to be disrupting the ecosystem by trampling and gobbling up vegetation. In response, the National Park Service in 2018 began airlifting mountain goats to the nearby North Cascades National Park, a locale with plenty of the naturally occurring mineral deposits needed to supplement their diets, and fewer of the freely urinating hikers just waiting to blog about their close encounters with intruding wildlife.

Tim Ott
Writer

Tim Ott has written for sites including Biography.com, History.com, and MLB.com, and is known to delude himself into thinking he can craft a marketable screenplay.

Original photo by guenterguni/ iStock

Icy glaciers probably don’t spring to mind when you think about the tropics. But whether it’s Indonesia, Colombia, Kenya, or elsewhere, glaciers do exist in these warm climates. Of course, these huge chunks of ice aren’t sipping mai tais beachside, but are instead perched high up in mountain ranges. These frigid formations are the result of snow that’s been compressed into massive, slow-moving bodies of ice over the course of centuries. 

An iceberg is a kind of glacier.

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Although icebergs may have once been part of a glacier, they are not glaciers themselves. Many floating icebergs form by separating, or calving, from large ice formations, but glaciers are much more massive than their long-lost offspring.

But although these glaciers have taken ages to form, their disappearing act will be much more swift. In all, 50% of mountain glaciers (both tropical and nontropical) will disappear by the end of this century due to climate change. Glaciers can serve as vital water reserves during drought, so their disappearance can have dire consequences in hot regions. In Indonesia, the Eternity Glaciers currently rest in the Jayawijaya mountains, but continuous dry seasons mean they’ll likely disappear forever in 2026. The ​​Conejeras glacier in the Colombian Andes will perform the same vanishing act on a similar timeline. Mount Kenya and Mount Kilimanjaro in Africa also sport glaciers on their peaks, though both mountains are steadily losing ice mass due to changes in ocean patterns caused by our warming world. Sadly, this is just the latest glacial batch facing evaporation. In 2009, ​​the Chacaltaya glacier in Bolivia disappeared completely, and the country has lost around half of its glaciers in the past 50 years. Glaciers will continue to exist in the colder reaches of the world for centuries, but the age of tropical glaciers is quickly coming to an end. 

Numbers Don't Lie

Numbers Don't Lie

Percentage of land on Earth covered by glaciers today
10
Degrees north and south from the equator of the tropics of Cancer and Capricorn, respectively
23.5
One estimate for the number of glaciers in Alaska alone
100,000
Amount of ice (in tons) the world loses every year, as of 2021
1.2 trillion

The largest tropical glacier is found in the South American country of ______.

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The largest tropical glacier is found in the South American country of Peru.

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Two glacial ice sheets contain 68% of the fresh water on Earth.

Sometimes, when land-based glaciers get massive (specifically 19,300 square miles), they become what’s known as an ice sheet. During the last ice age, the Laurentide Ice Sheet stretched 5 million square miles, was 2 miles thick, and covered most of Canada and the northern U.S., stretching as far south as the 37th parallel  — in fact, a small part of it still exists in Hudson Bay. Today, however, the big ice sheets are in the Antarctic and Greenland. Although climate change has caused these sheets to lose ice mass, they still contain 99% of the world’s freshwater ice and 68% of its total fresh water. Currently, the Antarctic Ice Sheet is about as big as the Laurentide was at its height, at roughly 5.4 million square miles.

Darren Orf
Writer

Darren Orf lives in Portland, has a cat, and writes about all things science and climate. You can find his previous work at Popular Mechanics, Inverse, Gizmodo, and Paste, among others.