17 Things to Know About René Descartes

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The French polymath René Descartes (1596-1650) lived after the Renaissance, but he personified that age's interest in mathematics, philosophy, art, and the nature of humanity. He made numerous discoveries and argued for ideas that people continue to grapple with. (His dualist distinction between mind and the brain, for example, continues to be debated by psychologists.) Get to know him better!

1. NOBODY CALLED HIM RENÉ.

Descartes went by a nickname and often introduced himself as “Poitevin” and signed letters as “du Perron.” Sometimes, he went so far to call himself the “Lord of Perron.” That’s because he had inherited a farm from his mother’s family in Poitou, in western France.

2. SCHOOL MADE HIM FEEL DUMBER.

From the age of 11 to 18, Descartes attended one of the best schools in Europe, the Jesuit College of Henry IV in La Flèche, France. In his later work Discourse on the Method, Descartes wrote that, upon leaving school, “I found myself involved in so many doubts and errors, that I was convinced I had advanced no farther in all my attempts at learning, than the discovery at every turn of my own ignorance."

3. HIS DAD WANTED HIM TO BE A LAWYER.

Descartes’s family was chock-full of lawyers, and the budding intellectual was expected to join them. He studied law at the University of Poitiers and even came home with a law degree in 1616. But he never entered the practice. In 1618, a 22-year-old Descartes enlisted as a mercenary in the Dutch States Army instead. There, he would study military engineering and become fascinated with math and physics.

4. HE CHANGED CAREER PATHS THANKS TO A SERIES OF DREAMS.

In 1618, the Emperor of the Holy Roman Empire, Ferdinand II, attempted to impose Catholicism on anybody living within his domain. The result of this policy would be the Thirty Years' War. It would also prompt Descartes, a Catholic, to switch allegiances to a Bavarian army fighting for the Catholic side. But on his travels, he stopped in the town of Ulm. There, on the night of November 10, he had three dreams that convinced him to change his life’s path. “Descartes took from them the message that he should set out to reform all knowledge,” philosopher Gary Hatfield writes in the Stanford Encyclopedia of Philosophy.

5. HE COULD BE EASILY DISTRACTED BY BRIGHT AND SHINY OBJECTS.

In 1628, Descartes moved to the Netherlands and spent nine months doggedly working on a theory of metaphysics. Then he got distracted. In 1629, a number of false suns—called parhelia, or “sun dogs”—were seen near Rome. Descartes put his beloved metaphysics treatise on the back burner and devoted his time to explaining the phenomenon. It was a lucky distraction: It led to his work The World, or Treatise on Light.

6. HE LAID THE GROUNDWORK FOR ANALYTIC GEOMETRY ...

In 1637, Descartes published his groundbreaking Discourse on the Method, where he took the revolutionary step of describing lines through mathematical equations. According to Hatfield, “[Descartes] considered his algebraic techniques to provide a powerful alternative to actual compass-and-ruler constructions when the latter became too intricate.” You might have encountered his system in high school algebra: They’re called Cartesian coordinates.

7. ... AND THE REST OF WESTERN PHILOSOPHY.

Everybody knows Descartes for his phrase Cogito, ergo sum (which originally appeared in French as "Je pense, donc je suis"), or "I think, therefore I am." The concept appeared in many of his texts. To understand what it means, some context is helpful: At the time, many philosophers claimed that truth was acquired through sense impressions. Descartes disagreed. He argued that our senses are unreliable. An ill person can hallucinate. An amputee can feel phantom limb pain. People are regularly deceived by their own eyes, dreams, and imaginations. Descartes, however, realized that his argument opened a door for "radical doubt": That is, what was stopping people from doubting the existence of, well, everything? The cogito argument is his remedy: Even if you doubt the existence of everything, you cannot doubt the existence of your own mind—because doubting indicates thinking, and thinking indicates existing. Descartes argued that self-evident truths like this—and not the senses—must be the foundation of philosophical investigations.

8. HE'S THE REASON YOUR MATH TEACHER MAKES YOU CHECK YOUR WORK.

Descartes was obsessed with certainty. In his book Rules for the Direction of the Mind, “he sought to generalize the methods of mathematics so as to provide a route to clear knowledge of everything that human beings can know,” Hatfield writes. His advice included this classic chestnut: To solve a big problem, break it up into small, easy-to-understand parts—and check each step often.

9. HE LIKED TO HIDE.

Descartes had a motto, which he took from Ovid: “Who lives well hidden, lives well.” When he moved to the Netherlands, he regularly changed apartments and deliberately kept his address a secret. Some say it's because he simply desired privacy for his philosophical work, or that he was avoiding his disapproving family. In his book titled Descartes, philosopher A. C. Grayling makes another suggestion: "Descartes was a spy."

10. HE WASN'T AFRAID OF CRITICS. IN FACT, HE RE-PUBLISHED THEM.

When Descartes was revising his Meditations on First Philosophy [PDF], he planned to send the manuscript to “the 20 or 30 most learned theologians” for criticism—a sort of proto-peer review. He collected seven objections and published them in the work. (Descartes, of course, had the last word: He responded to each criticism.)

11. HE COULD THROW SHADE WITH THE BEST OF THEM.

In the 1640s, Descartes’s pupil and friend Henricus Regius published a broadsheet that distorted Descartes’s theory of the mind. (Which, put briefly, posits that the material body and immaterial mind are separate and distinct.) The two men had a falling out, and Descartes wrote a rebuttal with a barbed title that refused to even acknowledge Regius’s manifesto by name: It was simply called “Comments on a Certain Broadsheet.”

12. HE NEVER BELIEVED MONKEYS COULD TALK.

There’s a “fun fact” parading around that suggests Descartes believed monkeys and apes could talk. He believed no such thing. According to the Stanford Encyclopedia of Philosophy, Descartes denied that animals were even conscious, let alone capable of speech. The factoid comes from a misreading of a letter Descartes had written in 1646, in which he attributed the belief to “savages.”

13. HE TOTALLY HAD THE HOTS FOR CROSS-EYED WOMEN.

In a letter to Queen Christina of Sweden, Descartes explained that he had a cross-eyed playmate as a child. “I loved a girl of my own age ... who was slightly cross-eyed; by which means, the impression made in my brain when I looked at her wandering eyes was joined so much to that which also occurred when the passion of love moved me, that for a long time afterward, in seeing cross-eyed women, I felt more inclined to love them than others.”

14. WHEN HE MET BLAISE PASCAL, THEY GOT INTO AN ARGUMENT ... ABOUT VACUUMS.

In 1647, a 51-year-old Descartes visited the 24-year-old prodigy and physicist Blaise Pascal. Their meeting quickly devolved into a heated argument over the concept of a vacuum—that is, the idea that air pressure could ever be reduced to zero. (Descartes said it was impossible; Pascal disagreed.) Later, Descartes wrote a letter that, depending on your translation, said that Pascal had “too much vacuum in his head.”

15. HIS WORK WAS BANNED BY THE CATHOLIC CHURCH.

Back in the late 1630s, the theologian Gisbert Voetius had convinced the academic senate of the University of Utrecht to condemn the philosopher’s work. (Descartes was Catholic, but his suggestion that the universe began as a “chaotic soup of particles in motion,” in Hatfield's words, was contrary to orthodox theology.) In the 1660s, his works were placed on the church’s Index of Prohibited Books.

16. HE REGULARLY SLEPT UNTIL NOON (AND TRYING TO BREAK THE HABIT MIGHT HAVE KILLED HIM).

Descartes was not a morning person. He often snoozed 12 hours a night, from midnight until lunchtime. In fact, he worked in bed. (Sleep, he wisely wrote, was a time of “nourishment for the brain.”) But according to the Journal of Historical Neuroscience, he may have had a sleep disorder that helped end his life. A year before his death, Descartes had moved to Stockholm to take a job tutoring Queen Christina, a devoted early-riser who forced Descartes to change his sleep schedule. Some believe the resulting sleep deprivation weakened his immune system and eventually killed him.

17. HIS SKELETON HAS TRAVELED FAR AND WIDE.

Descartes died in Stockholm in 1650 and was buried outside the city. Sixteen years later, his corpse was exhumed and taken to Paris. During the French Revolution, his bones were moved to an Egyptian sarcophagus at the Museum of French Monuments. Decades later, when plans were made to rebury Descartes in an abbey, officials discovered that most of his bones—including his skull—were missing. Shortly after, a Swedish scientist discovered a newspaper advertisement attempting to sell the polymath’s noggin [PDF]. Today, his head is in a collection at the Musée de l’Homme in Paris.

13 Surprising Facts About George Orwell

Cassowary Colorizations, Flickr // CC BY 2.0
Cassowary Colorizations, Flickr // CC BY 2.0

Before he assumed the pen name George Orwell, Eric Arthur Blair had a relatively normal upbringing for an upper-middle-class English boy of his time. Looking back now, his life proved to be anything but ordinary. He's best known for penning the dystopian novel Nineteen Eighty-Four—regarded as one of the greatest classics of all time—but writing novels was only one small facet of his life and career. In remembrance of Orwell, who was born on June 25, 1903, here are 13 facts about his life that may surprise you.

1. George Orwell attended prep school as a child—and hated it.

Eric Blair spent five years at the St. Cyprian School for boys in Eastbourne, England, which later inspired his melodramatic essay Such, Such Were the Joys. In this account, he called the school’s proprietors “terrible, all-powerful monsters” and labeled the institution itself "an expensive and snobbish school which was in process of becoming more snobbish, and, I imagine, more expensive." While Blair's misery is now considered to be somewhat exaggerated, the essay was deemed too libelous to print at the time. It was finally published in 1968 after his death.

2. He was a prankster.

Blair was expelled from his "crammer" school (an institution designed to help students "cram" for specific exams) for sending a birthday message attached to a dead rat to the town surveyor, according to Sir Bernard Crick's George Orwell: A Life, the first complete biography of Orwell. And while studying at Eton College, Orwell made up a song about John Crace, his school’s housemaster, in which he made fun of Crace’s appearance and penchant for Italian art:

Then up waddled Wog and he squeaked in Greek:
‘I’ve grown another hair on my cheek.’
Crace replied in Latin with his toadlike smile:
‘And I hope you’ve grown a lovely new pile.
With a loud deep fart from the bottom of my heart!
How d’you like Venetian art?'

Later, in a newspaper column, he recalled his boyhood hobby of replying to advertisements and stringing the salesmen along as a joke. “You can have a lot of fun by answering the advertisements and then, when you have drawn them out and made them waste a lot of stamps in sending successive wads of testimonials, suddenly leaving them cold,” he wrote.

3. He worked a number of odd jobs for most of his career.

A photo of Orwell with a BBC microphone
Wikimedia Commons // Public Domain

Everyone’s got to pay the bills, and Blair was no exception. He spent most of his career juggling part-time jobs while authoring books on the side. Over the years, he worked as a police officer for the Indian Imperial Police in Burma (present-day Myanmar), a high school teacher, a bookstore clerk, a propagandist for the BBC during World War II, a literary editor, and a war correspondent. He also had stints as a dishwasher in Paris and as a hop-picker (for breweries) in Kent, England, but those jobs were for research purposes while “living as a tramp” and writing his first book about his experiences, Down and Out in Paris and London. (He chose to publish the book under a pseudonym, George Orwell, and the name stuck.)

4. He once got himself arrested. On purpose.


The National Archives UK // Public Domain

In 1931, while investigating poverty for his aforementioned memoir, Orwell intentionally got himself arrested for being “drunk and incapable.” This was done “in order to get a taste of prison and to bring himself closer to the tramps and small-time villains with whom he mingled,” biographer Gordon Bowker told The Guardian. At the time, he had been using the pseudonym Edward Burton and posing as a poor fish porter. After drinking several pints and almost a whole bottle of whisky and ostensibly making a scene (it’s uncertain what exactly was said or done), Orwell was arrested. His crime didn’t warrant prison time like he had hoped, and he was released after spending 48 hours in custody. He wrote about the experience in an unpublished essay titled Clink.

5. He had knuckle tattoos.

While working as a police officer in Burma, Orwell got his knuckles tattooed. Adrian Fierz, who knew Orwell, told biographer Gordon Bowker that the tattoos were small blue spots, “the shape of small grapefruits,” and Orwell had one on each knuckle. Orwell noted that some Burmese tribes believed tattoos would protect them from bullets. He may have gotten inked for similarly superstitious reasons, Bowker suggested, but it's more likely that he wanted to set himself apart from the British establishment in Burma. "He was never a properly 'correct' member of the Imperial class—hobnobbing with Buddhist priests, Rangoon prostitutes, and British drop-outs," Bowker wrote.

6. He knew seven foreign languages, to varying degrees.

Orwell wrote in a 1944 newspaper column, “In my life I have learned seven foreign languages, including two dead ones, and out of those seven I retain only one, and that not brilliantly.” In his youth, he learned French from Aldous Huxley, who briefly taught at Orwell’s boarding school and later went on to write Brave New World. Orwell ultimately became fluent in French, and at different points in his life he studied Latin, Greek, Spanish, and Burmese, to name a few.

7. He voluntarily fought in the Spanish Civil War.

Like fellow writer Ernest Hemingway and others with leftist leanings, Orwell got tangled up in the Spanish Civil War. At the age of 33, Orwell arrived in Spain, shortly after fighting had broken out in 1936, hoping to write some newspaper articles. Instead, he ended up joining the Republican militia to “fight fascism” because “it seemed the only conceivable thing to do.” The following year, he was shot in the neck by a sniper, but survived. He described the moment of being shot as “a tremendous shock—no pain, only a violent shock, such as you get from an electric terminal; with it a sense of utter weakness, a feeling of being stricken and shriveled up to nothing.” He wrote about his war experiences in the book Homage to Catalonia.

8. His manuscript for Animal Farm was nearly destroyed by a bomb.


Thomas D, Flickr // CC BY-ND 2.0

In 1944, Orwell’s home at 10 Mortimer Crescent in London was struck by a “doodlebug” (a German V-1 flying bomb). Orwell, his wife Eileen, and their son Richard Horatio were away at the time, but their home was demolished. During his lunch break at the British newspaper Tribune, Orwell would return to the foundation where his home once stood and sift through the rubble in search of his books and papers—most importantly, the manuscript for Animal Farm. “He spent hours and hours rifling through rubbish. Fortunately, he found it,” Richard recalled in a 2012 interview with Ham & High. Orwell then piled everything into a wheelbarrow and carted it back to his office.

9. He had a goat named Muriel.

He and his wife Eileen tended to several farm animals at their home in Wallington, England, including Muriel the goat. A goat by the same name in Orwell’s book Animal Farm is described as being one of the few intelligent and morally sound animals on the farm, making her one of the more likable characters in this dark work of dystopian fiction.

10. He coined the term "Cold War."

The first recorded usage of the phrase “cold war” in reference to relations between the U.S. and Soviet Union can be traced back to Orwell’s 1945 essay You and the Atom Bomb, which was written two months after atomic bombs were dropped on Hiroshima and Nagasaki. In the essay, he described “a state which was at once unconquerable and in a permanent state of ‘cold war’ with its neighbors.” He continued:

“Had the atomic bomb turned out to be something as cheap and easily manufactured as a bicycle or an alarm clock, it might well have plunged us back into barbarism, but it might, on the other hand, have meant the end of national sovereignty and of the highly centralized police state. If, as seems to be the case, it is a rare and costly object as difficult to produce as a battleship, it is likelier to put an end to large-scale wars at the cost of prolonging indefinitely a ‘peace that is no peace.’”

11. He ratted out Charlie Chaplin and other artists for allegedly being communists.

Orwell self-identified as a democratic socialist, but his sympathy didn’t extend to communists. In 1949, he compiled a list of artists he suspected of having communist leanings and passed it along to his friend, Celia Paget, who worked for the UK’s Information Research Department. After the war ended, the branch was tasked with distributing anti-communist propaganda throughout Europe. Orwell's list included Charlie Chaplin and a few dozen other actors, writers, academics, and politicians. Other notable names that were written down in his notebook but weren’t turned over to the IRD included Katharine Hepburn, John Steinbeck, George Bernard Shaw, Orson Welles, and Cecil Day-Lewis (the father of Daniel Day-Lewis).

Orwell’s intention was to blacklist those individuals, whom he considered untrustworthy, from IRD employment. While journalist Alexander Cockburn labeled Orwell a “snitch,” biographer Bernard Crick wrote, “He wasn’t denouncing these people as subversives. He was denouncing them as unsuitable for counter-intelligence operation.”

12. He really hated American fashion magazines.

A woman reads a fashion magazine in the '40s
Keystone View/FPG/Getty Images

For a period of about a year and a half, Orwell penned a regular column called As I Please for the newspaper Tribune, in which he shared his thoughts on everything from war to objective truth to literary criticism. One such column from 1946 featured a brutal takedown of American fashion magazines. Of the models appearing on their pages, he wrote, “A thin-boned, ancient-Egyptian type of face seems to predominate: narrow hips are general, and slender, non-prehensile hands like those of a lizard are quite universal.”

As for the inane copy that accompanied advertisements, he complained:

"Words like suave-mannered, custom-finished, contour-conforming, mitt-back, inner-sole, backdip, midriff, swoosh, swash, curvaceous, slenderize, and pet-smooth are flung about with evident full expectation that the reader will understand them at a glance. Here are a few sample sentences taken at random: 'A new Shimmer Sheen color that sets your hands and his head in a whirl.' 'Bared and beautifully bosomy.' 'Feathery-light Milliken Fleece to keep her kitten-snug!' 'Others see you through a veil of sheer beauty, and they wonder why!'"

In the rest of the column, he went on to discuss traffic fatalities.

13. He nearly drowned while writing Nineteen Eighty-Four.

One day in 1947 while taking a break from writing Nineteen Eighty-Four, Orwell took his son, niece, and nephew on a boating trip across the Gulf of Corryvreckan in western Scotland, which happens to be the site of the world's third-largest whirlpool. Unsurprisingly, their dinghy capsized when it was sucked into the whirlpool, hurling them all overboard. Fortunately, all four survived, and the book that later came to be called Nineteen Eighty-Four (originally named The Last Man in Europe) was finally published in 1949, just seven months before Orwell's death from tuberculosis.

This story has been updated for 2019.

20 Freaky Facts About the Giant Squid

Canadian Illustrated News, Wikimedia Commons // Public Domain
Canadian Illustrated News, Wikimedia Commons // Public Domain

Last week, scientists aboard a NOAA Ocean Exploration and Research ship in the Gulf of Mexico captured video of an elusive giant squid—the first recorded sighting in U.S. waters. In the 28-second clip, the cephalopod emerges from the blackness of the deep sea and attacks an electronic jellyfish. After wrapping its tentacles around the luminescent bait, the squid loses interest and disappears in the murk. Since ancient times, philosophers and naturalists have puzzled over this rarely seen enigma. There’s plenty we still don’t know about giant squid, but we’ve learned a lot over the past 20 years.

1. Giant squid eyes are the size of Frisbees.

Woman next to a preserved giant squid eye
Smithsonian Institution, Wikimedia Commons // Public Domain

A staggering 10.5 inches across, a squid’s eyeballs lack the jelly-like substance that gives ours their shape. Instead, they’re filled with water, which leaks out once the invertebrate dies. "The eyes collapse. It's like a collapsed plastic bag,” biologist Dan-Eric Nilsson told NPR in 2012.

2. Female giant squid are bigger than males.

On average, female giant squid are around twice the size of males from the tip of their beaks to the ends of their two longest tentacles.

3. Giant squid suckers can leave ugly battle scars.

The giant squid's main enemy is the sperm whale. While under attack, the squid often retaliate by inflicting large, circular wounds, courtesy of the serrated rings around each sucker.

4.The giant squid’s maximum length is about 43 feet.

At least, that’s what the available evidence tells us. Reports of 60- and 70-footers have never been verified scientifically.

5. Instead of a proper tongue, they use a radula.

This organ rests inside their beaks and is covered with seven rows of denticles—sharp, toothy, backwards-pointing protrusions.

6. There may be just one known species.

A genetic analysis in 2013 suggested that Architeuthis duxis the only species of giant squid, as revealed by a comparison of 43 specimens from around the world. The giant squid gene pool seemed abnormally shallow—all 43 subjects were pretty much indistinguishable in this regard. “It’s completely bizarre,” geneticist Thomas Gilbert said. “How can something be global but have so little variation?” Other researchers, however, argue that there may be as many as eight Architeuthis species out there.

7. Giant squid tentacles can regenerate.

One giant squid corpse found in Canada in 1968 had a partially regenerated tentacle. According to a study of the specimen in the Canadian Journal of Zoology, "the regenerated club differed in length and width, and in the size and pattern of suckers, when compared with the normal tentacular arm." Many cephalopods besides squid are capable of this feat, including octopuses.

8. An estimated 4.3 to 131 million get eaten by sperm whales each year.

The squid regularly show up inside sperm whale stomachs. Approximately 360,000 of these mammals swim the oceans. So, if every sperm whale on Earth devoured an average of one giant squid per month, that means 4.3 million would be offed annually.

But some experts think this figure is way too low. Every single day, male whales put away 300 to 400 squid of various species, while females consume an outrageous 700 to 800 squid. Should Architeuthis represent even 1 percent of their diet, then the whales eat 3.6 million daily. That’s 131 million giant squid killed annually.

9. Giant squid may have helped give rise to sea serpent legends.

In one of Moby-Dick’s more memorable chapters, an Architeuthis slithers towards Captain Ahab’s whaleboat. Apparently, Herman Melville wasn’t a fan—Ishmael describes the squid as a “vast, pulpy mass” complete with “innumerable long arms radiating from its center, curling and twisting like a nest of anacondas.” But Melville wasn't alone. Many believe that this predator’s writhing, snake-like limbs have long inspired sea serpent yarns.

10. 20,000 Leagues Under the Sea grossly overestimates the giant squid’s usual weight.

Jules Verne’s 1869 masterpiece remains impressive today: his novel predicted the invention of both scuba tanks and taser guns. But there are still a few gaffes to be found, particularly during the book’s most iconic scene. When hordes of giant squid attack, the narrator, a French professor named Pierre Arronax, estimates that each one must weigh “between four and five thousand pounds.” But as far as modern scientists can tell, the heaviest animals weigh around a ton—although most are less than 1000 pounds.

11. Like all squids, giant squids have three hearts.

A median heart pumps oxygenated blood throughout the body, which it receives from two smaller ones that pump blood through the gills.

12. Architeuthis penises are about a yard long.

Nobody has ever documented a pair of giant squid getting busy. But biologists suspect that males use their sex organs like syringes, injecting sperm into a female’s skin, where she stores the cells until her eggs need fertilizing. When that happens, the mom-to-be pulls them out of storage (though we’re not sure how).

13. The first giant squid photo ever shot was taken inside of a bathroom.

First photo of a giant squid
Wikimedia Commons // Public Domain

In 1873, Newfoundland minister Moses Harvey acquired a dead Architeuthis which he laid out over his shower curtain rod and preserved for posterity. He’d purchased this specimen for just $10 from a few local fishermen who’d ensnared it with their nets while out in Logy Bay.

14. Giant squid might be cannibals.

Bits and pieces of one Architeuthis showed up in a live giant squid's stomach. But this doesn’t necessarily prove that giant squid dine on one another—some scientists speculate that the squid may have accidentally swallowed a few parts of itself somehow.

15. The Smithsonian has two giant squid on display.

You can see them in the National Museum of Natural History’s Sant Ocean Hall. The pair represents both sexes—here’s a quick look at their 25-foot female (it was probably 36 feet while alive):

16. Their brains are donut-shaped.

But that’s not the weird part. What’s truly bizarre (at least from our mammal-centric perspective) is the fact that its esophagus passes through the hole in the middle of its brain. Giant squids have to be really careful while swallowing, because if a given meal isn’t broken down into small pieces first, it can rub against the brain and cause damage.

17. Before 2004, nobody had ever snapped any pictures of a live one …

History was made by residents of the Ogasawara Islands (located 600 miles south of Japan) on September 30, 2004. Using a line baited with shrimp, zoologist Tsunemi Kubodera and whale-watcher Kyochi Mori attracted an Architeuthis about 2950 feet beneath their vessel. Five hundred still images were then snapped by a submerged camera before the squid took off—leaving behind an 18-foot severed tentacle.

18. … And the world’s first giant squid video didn’t arrive until 2006.

Kubodera would top himself that year when his crew videotaped a young female as they dragged her up to the surface. “We believe this is the first time anyone has successfully filmed a giant squid that was alive,” he said. “Now that we know where to find them, we think we can be more successful at studying them in the future.” Sadly, Kubodera’s prize died during the ordeal.

19. Jellyfish help Architeuthis hunt.

They say the enemy of your enemy is your friend. Certain jellyfish are bioluminescent, which means that they can light themselves up and illuminate the ocean’s inky depths. Predators like giant squid eat many of the fish that hunt jellyfish. So, if a bioluminescent jelly finds itself under attack, it can issue a cry for help by flashing a distress signal, in the hopes that it might attract an even larger carnivore and scare off its assailant. That was the theory behind luring the giant squid with an electronic jellyfish, as seen in the recent NOAA video.

20. It’s not the only monster-sized squid out there.

Meet Mesonychoteuthis hamiltoni, better known as the colossal squid. Though Architeuthis probably exceeds it length-wise, M. hamiltoni is heavier on average, has even bigger eyeballs, and wields swiveling hooks on its tentacles. This isn't a creature you’d want to mess with.

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