Conspiracy theories of 1900 to 1939
The early 20th century: world wars, new technologies, and the assassinations and cover-ups of the modern age's first decades.
A living dinosaur, Mokele-mbembe, survives in the Congo swamps and expeditions keep just missing it
Deep in the swamp forests of the northern Republic of the Congo, local accounts describe Mokele-mbembe, a large, long-necked animal that lives in the rivers and lakes of the Likouala region and around remote Lake Tele. Western enthusiasts read those descriptions as a surviving sauropod dinosaur and have mounted expedition after expedition to prove it. The lore is real and the search is well documented, from a 1913 German report to the University of Chicago biologist Roy Mackal's trips in the early 1980s. The results are just as well documented: local testimony, disputed footprint casts, ruined film, and not one specimen, bone, or clear photograph. This case file separates the folklore and the genuine mystery of an under-surveyed jungle from the specific, and unsupported, claim that a dinosaur is hiding in it.
Read the case file →Nikola Tesla invented free energy, and it was suppressed
The claim that Nikola Tesla perfected a machine giving the world limitless free electricity, and that it was shut down by J.P. Morgan and corporate interests to protect the profits of the power industry. The real story is stranger and sadder: a real genius, a real tower, a real funding collapse, and no evidence any such device ever worked.
Read the case file →Robert the Doll, the antique doll displayed in Key West, is a cursed and self-aware object that moves on its own and brings misfortune to anyone who disrespects it
Robert the Doll is an early-1900s straw-stuffed doll, roughly three feet tall and dressed in a child's sailor suit, that has sat on display at the Fort East Martello Museum in Key West, Florida, since 1994. He once belonged to the Key West painter and author Robert Eugene Otto, who reportedly received the doll as a small child around 1904 and named it after himself. Over more than a century, a dense body of legend has attached to the object: that Robert moves on his own, changes his facial expression, giggles, was cursed by a servant said to practice folk magic, and brings car crashes, illness, divorce, and other misfortune on visitors who photograph or mock him without asking permission. This case file separates the documented record (a genuine antique doll with an unusual local history and a thriving museum tradition around it) from the rated claim (that the doll is a conscious, cursed, or haunted object). On the evidence, the paranormal claim is unproven: it is built from anecdote and hindsight, not from anything that can be tested or verified.
Read the case file →Three lighthouse keepers vanished from the Flannan Isles under inexplicable or sinister circumstances
In December 1900, three keepers vanished without trace from a new lighthouse on a remote Atlantic rock in the Outer Hebrides, leaving a stopped clock, an unfinished chore, and a light that had gone dark: a real and permanent mystery later buried under a century of invented meals, phantom log entries, and sea monsters.
Read the case file →The Antikythera mechanism is an out-of-place artifact whose technology was too advanced for ancient Greece and points to a lost or non-human source
In 1901, sponge divers working a Roman-era shipwreck off the Greek island of Antikythera brought up a corroded lump of bronze that turned out to contain precision gearwheels. Over the following century, radiographs and then microfocus CT scanning revealed the Antikythera mechanism to be a geared analog computer, built in the 2nd century BC, that modeled the motions of the Sun, Moon, and planets, tracked luni-solar calendars, and predicted eclipses using cycles inherited from Babylonian and Greek astronomy. Nothing of comparable mechanical complexity is known again for more than a thousand years. That gap, together with the device's uncanny resemblance to a modern instrument, has made it a favorite exhibit for writers who argue it is an out-of-place artifact, too advanced for its time, and therefore evidence of a lost super-civilization or extraterrestrial visitors. This case file separates the documented record (a genuine, thoroughly studied triumph of ancient Greek engineering) from the rated claim (that it is an anomaly demanding a non-human or lost-technology explanation), which the evidence debunks.
Read the case file →In 1903 a winged, light-projecting creature terrorized the town of Van Meter, Iowa, and prominent citizens tracked it to an abandoned coal mine
In the fall of 1903, the small coal-mining town of Van Meter, Iowa, reported five nights of encounters with a strange winged creature. Witnesses, many of them the town's leading citizens, described a tall, half-human, half-animal figure with enormous bat-like wings and a horn or beak on its head that threw a blinding beam of light. Gunfire seemed to have no effect. A group of townsmen finally tracked the thing to an old abandoned mine on the edge of town, where they said they confronted not one creature but two, fired on them, and watched them vanish underground, never to return. The story ran in Iowa newspapers at the time and has been revived repeatedly since. This case file separates the documented record (that respected people reported these things and the press recorded it) from the rated claim (that a real unknown winged creature actually visited Van Meter). No physical evidence has ever surfaced. On that claim the verdict is unproven.
Read the case file →Life on Earth did not begin here but arrived from space, seeded by microorganisms or the chemical building blocks of life carried on comets, meteorites, and interstellar dust
Panspermia is the hypothesis that life on Earth did not arise here from scratch but came from space, either as the raw chemistry of life delivered by comets and meteorites or, in its bolder form, as living microorganisms carried across the void and deposited on a young planet. The word means “seeds everywhere.” It has a long pedigree: named by the Greek philosopher Anaxagoras, revived as physics by Svante Arrhenius in 1903, and pushed to its limits by the astronomers Fred Hoyle and Chandra Wickramasinghe. What makes it worth a careful file is that one half of it is now solidly established while the other remains open. Meteorites like the one that fell at Murchison, Australia, and asteroid samples returned from Bennu are genuinely loaded with amino acids and the components of DNA, proving that life's ingredients form in space and reach Earth. This file separates that documented record from the rated claim (that living things, not just chemicals, originated elsewhere and colonized Earth), which the evidence does not establish. On that stronger claim the verdict is unproven.
Read the case file →The Phaistos Disc encodes a lost message, a hymn, a prayer, or a secret, that has been deciphered, or that betrays an origin stranger than Bronze Age Crete
The Phaistos Disc is one of archaeology's most famous unsolved objects: a hand-sized disc of fired clay, roughly 15 centimeters across, stamped on both faces with a spiral of 241 sign-impressions drawn from 45 distinct symbols. The Italian archaeologist Luigi Pernier found it in 1908 in a room of the Minoan palace of Phaistos in southern Crete, and it has sat, undeciphered, in the Heraklion Archaeological Museum ever since. Because the signs match no known script, because the disc is unique with no second example to compare against, and because the symbols were pressed in with reusable stamps (a kind of movable type millennia before Gutenberg), the object has drawn a century of competing claims: that its message has finally been read, that it is a hymn or prayer or calendar, that it is a clever modern hoax, and, at the fringe, that its technique is too advanced for the Bronze Age and hints at a stranger origin. This case file keeps the documented artifact separate from the rated claim. The disc is real and its script is genuinely unread; the exotic claims (a confirmed decipherment, a non-human or out-of-place origin) are unproven.
Read the case file →The Tunguska explosion was caused by something other than a cosmic airburst
On 30 June 1908, an explosion over the Siberian taiga flattened roughly 2,000 square kilometers of forest and was felt across three continents, with no crater, no witnesses at the epicenter, and no serious scientific expedition for nineteen years. Into that gap poured theories ranging from Nikola Tesla's death ray to antimatter, black holes, and a crashed alien craft. A century of forensic work (tree-fall geometry, recovered meteoritic spherules, and modern airburst modeling) points to a single, ordinary cause: a stony asteroid or comet fragment that detonated in the atmosphere before it ever reached the ground.
Read the case file →Linear A, the writing system of Minoan Crete, has been secretly or definitively deciphered, and the Minoan language is now known
Linear A is the undeciphered writing system of Bronze Age Minoan Crete, in use from roughly 1800 to 1450 BCE and first classified by the British archaeologist Arthur Evans in 1909. It survives on clay tablets, stone libation vessels, and other objects, in a corpus of about 1,400 inscriptions. Its close relative, Linear B, was famously deciphered as an early form of Greek by Michael Ventris in 1952, and because the two scripts share most of their signs, scholars can assign provisional sound values to much of Linear A. The catch is that reading the sounds aloud does not reveal the language: the resulting words fit no securely identified tongue, and no bilingual inscription (no Rosetta Stone) exists to anchor a translation. Over the decades many people have announced that they have solved it, from a Semitic reading in the 1950s and 1960s to Greek, Anatolian, and other proposals, and most recently to artificial-intelligence and computational claims. This case file keeps two things apart: the documented reality of the script, which is not in doubt, and the rated claim that any one of these decipherments has actually recovered the Minoan language, which remains unproven.
Read the case file →A large unidentified creature nicknamed Whitey lives in the White River of Arkansas, real enough that the state set aside a legal refuge to protect it
The White River Monster, affectionately called Whitey, is a creature said to inhabit the White River in northeastern Arkansas near Newport. The reports are real and well documented: in the summer of 1937 a plantation manager named Bramlett Bateman swore an affidavit describing a gray creature the width of a car and the length of three, and thousands of curious visitors descended on the river while a hired deep-sea diver searched the muddy water and found nothing. A second wave of sightings arrived in the summer of 1971, complete with a blurry Polaroid, descriptions of a boxcar-sized animal with peeling skin, and a trail of three-toed tracks. In 1973 the Arkansas legislature passed a resolution creating an official White River Monster Refuge where it is illegal to harm the creature. This case file separates the documented record (sighting flaps, affidavits, a real statute) from the rated claim (that an actual unidentified large animal exists). No physical specimen has ever confirmed it, and naturalists have offered competing mundane explanations, so the existence of a genuine monster remains unproven.
Read the case file →A small upright ape unknown to science, the orang pendek, lives undiscovered in the forests of Sumatra
In the mountainous rainforests of central Sumatra, and especially within Kerinci Seblat National Park, generations of villagers, farmers, and forest rangers have described a small, powerfully built ape that walks upright on two legs. It is called the orang pendek, Indonesian for “short person.” Witnesses put it at roughly a meter tall, covered in dark or tan hair, barrel-chested and immensely strong, with an ape-like face and no tail. Since the late 1980s the reports have drawn serious field investigators, who have recorded consistent testimony, cast strange footprints, and gathered hair samples in the hope of proving a new species. This case file separates the documented record (real folklore, sincere eyewitness accounts, and genuine trace evidence that experts could not immediately place) from the rated claim (that an undiscovered upright ape actually exists). On the evidence available, that claim is unproven: no specimen has ever been produced, no clear photograph exists, and the only peer-reviewed DNA test of an orang pendek hair identified it as a Malayan tapir. The Sumatran wilderness is large enough that the question cannot be closed, but nothing yet establishes the animal as real.
Read the case file →The Federal Reserve is a privately owned bank run by a secret cabal that engineers inflation, booms, and busts to enrich insiders
In November 1910, a United States senator and a handful of the most powerful bankers in the country boarded a private railcar under assumed names, traveled to a secluded island off Georgia, and drafted the blueprint for what became the Federal Reserve. That meeting really was secret, and the participants denied it for decades. That real secrecy is the seed from which a much larger theory grows: that the Fed is a privately owned bank, controlled by an elite cabal, deliberately manufacturing inflation, booms, busts, and debt to enrich insiders and quietly rule the country. The secret meeting is documented. The cabal is not.
Read the case file →Machu Picchu was built with lost technology or extraterrestrial help, not by the Inca alone
Machu Picchu, the Inca estate perched on a ridge about 2,430 meters above Peru's Urubamba valley, is one of the most studied and photographed archaeological sites on Earth. Its mortarless walls of tightly fitted stone, its terraces and drainage, and its dramatic setting have long fed a popular claim: that the Inca could not have built it with the tools they had, so the real builders must have wielded lost technology or come from the stars. This case file separates the documented record (a 15th-century royal estate raised by a sophisticated Andean state) from the rated claim (that its construction is inexplicable without aliens or vanished super-technology). On the evidence, the fringe claim is debunked. Archaeologists have a detailed, testable account of who built the site, roughly when, and how. Genuine open questions about its exact function, precise chronology, and the logistics of moving stone are noted as the live research they are, not as gaps that require visitors from space.
Read the case file →An entire family and two young houseguests were murdered with an axe in a small Iowa town
On a Sunday night in June 1912, in the farm town of Villisca in southwestern Iowa, eight people were beaten to death in their beds with an axe. Six of them were the Moore family: Josiah, his wife Sarah, and their four children. The other two were Lena and Ina Stillinger, sisters aged 12 and 8, who had been invited to stay the night after a church program. The killer used the family's own axe, covered the victims' faces and the household's mirrors, and appears to have lingered in the house before slipping away unseen. By the time anyone understood what had happened, curious neighbors had already walked through the rooms, and the crime scene was effectively destroyed. No one was ever convicted. Over the decades the suspicion settled, at different times, on a peculiar traveling preacher, on a powerful local rival of Josiah Moore, and on an unknown drifter tied to a chain of similar axe murders across the country. This case file separates the documented record (the killings, the ruined scene, the men actually investigated) from the rated claim (which of the competing theories, if any, names the killer), and explains why, more than a century on, the answer is genuinely still unknown.
Read the case file →The Nandi bear is a real, undiscovered ferocious predator prowling the highlands of East Africa
The Nandi bear, known in Kalenjin as the chemosit and in various accounts as the kerit, koddoelo, or ngoloko, is a cryptid reported from the highlands of western Kenya. Folklore describes a ferocious, nocturnal, powerfully built beast with high front shoulders, a sloping back, and a taste for the brains of its victims. From about 1912 a run of sighting reports by British settlers and colonial officials, later compiled by the naturalist Charles William Hobley, brought the creature to European attention, and a wave of livestock killings around 1919 fed a genuine scare. Naturalists proposed everything from a surviving prehistoric chalicothere to a giant relict hyena, while skeptics pointed to spotted hyenas and honey badgers. This case file separates the documented record, a real tradition and a real archive of reports, from the rated claim that a distinct undiscovered predator exists. On the evidence that claim is unproven, and the leading explanation is that the Nandi bear is a composite of known animals dressed in folklore.
Read the case file →The Voynich manuscript is an undeciphered book hiding secret knowledge
A 15th-century illustrated codex written in a script no one has ever read, full of botanical, astronomical and biological drawings that match nothing known: studied and defeated by professional cryptographers, WWII codebreakers and linguists for over a century, with every claimed 'solution' collapsing under scrutiny.
Read the case file →The boy recovered in 1913 was the missing Bobby Dunbar, and the mystery of the Louisiana child was solved
On 23 August 1912, Percy and Lessie Dunbar took their two young sons on a camping and fishing trip to Swayze Lake, near Opelousas in St. Landry Parish, Louisiana. Their four-year-old, Bobby, wandered from the camp and disappeared. A search dragged the lake, considered drowning and an alligator, then a kidnapping, and a large reward was posted. Eight months later, in April 1913, authorities in Mississippi found a boy traveling with an itinerant handyman named William Cantwell Walters. The Dunbars identified the child as Bobby by physical marks and took him home after a contentious trial, while a North Carolina woman, Julia Anderson, insisted the boy was her own son, Bruce. The courts sided with the Dunbars, and the boy was raised as Bobby Dunbar. He lived a full life and died in 1966. In 2004, DNA testing showed conclusively that he was not a biological Dunbar, confirming Julia Anderson's account and meaning the real Bobby had never been found. This file separates the documented record (a mistaken identification, now settled by DNA) from the rated claim (the unknown fate of the original child).
Read the case file →Two girls photographed real fairies at Cottingley
Five photographs taken by two young cousins in a Yorkshire garden convinced the creator of Sherlock Holmes that fairies were real. Sixty-six years later, both women admitted the figures were paper cutouts, though one never fully recanted.
Read the case file →The Axeman of New Orleans was a single serial killer who terrorized the city in 1918 and 1919 and was never caught
For roughly eighteen months in 1918 and 1919, residents of New Orleans lived under the shadow of a series of nighttime attacks in which intruders broke into homes, frequently those of Italian immigrant grocers, and struck sleeping occupants with an axe or hatchet, often a tool already on the premises. Several people were killed and others gravely injured. The attacker or attackers were never caught. In mid-March 1919 a letter published in a local newspaper, signed by someone claiming to be the killer, announced that he would spare any home where a jazz band was playing on the night of March 19; the city responded with music, and no attack was reported that night. This case file separates the documented record (a real, unsolved series of violent crimes) from the rated claim (that all the incidents were one identifiable serial killer whose name is known). The crimes are historical fact. The tidy single-culprit story, and the named suspect attached to it, remain unproven.
Read the case file →The Thule Society was the secret occult brotherhood that masterminded the rise of Nazism from behind the scenes
The Thule Society (Thule-Gesellschaft) was a real organization. Founded in Munich in 1918 by the occultist Rudolf von Sebottendorff as the public cover name for the Munich lodge of the Germanenorden Walvater, it was a völkisch, antisemitic, occult-flavored secret order that preached the myth of a pure ancient Aryan race and agitated against the Bavarian revolutionary left. Its documented connections to the birth of Nazism are genuine: a Thule member, Karl Harrer, helped found the German Workers' Party in January 1919, the party Hitler joined that autumn and remade into the Nazi Party; and the society owned the Münchener Beobachter newspaper that became the Völkischer Beobachter. From those real threads grew a far larger story: that the Thule Society was the secret occult brain behind Hitler, an inner brotherhood that conjured the Third Reich through mysticism and hidden power. This case file separates the documented record (a real, noxious, and consequential group) from the rated claim (a hidden mastermind), which remains unproven and, in its most colorful forms, fabricated.
Read the case file →Eight Chicago White Sox players conspired with gamblers to throw the 1919 World Series to the Cincinnati Reds
The 1919 World Series between the Chicago White Sox and the Cincinnati Reds is the most famous fixed championship in American sports. The documented record is not in doubt: eight White Sox players agreed with a gambling ring to lose the best-of-nine Series, took payments, and several later confessed; Cincinnati won five games to three. This case file keeps that documented record apart from the still-argued edges, which are the precise distribution of the bribe money and the exact extent of Joe Jackson's involvement, since his .375 average led both teams. It also reports the full legal and administrative record: the players' 1921 criminal acquittal on one hand, and their permanent bans from baseball on the other. As a claim that the Series was thrown, the verdict is substantiated.
Read the case file →The Unfinished Obelisk of Aswan is too large and too precisely worked to be the product of hand tools, and proves a lost or non-human technology
In the granite quarries on the east bank of the Nile at Aswan lies one of the most instructive objects in Egyptology: a single obelisk, still attached to the bedrock along its underside, that its makers never freed. Had it been finished it would have stood roughly 42 metres tall and weighed close to 1,090 tonnes, nearly a third larger than any obelisk the Egyptians ever raised. Work stopped when fissures opened in the granite, and the shaft was left where it lay, most likely a project of the pharaoh Hatshepsut around 1479 to 1458 BC. Because the object is so vast, a popular claim holds that no hand-tool culture could have shaped it and that it therefore points to a lost or non-human technology, machines, sonic drills, or otherworldly help. This case file separates the documented record (a partially quarried monument that preserves, uniquely, the exact tools and techniques used on it) from the rated claim (that its scale proves advanced or alien technology). On the evidence, the fringe claim is debunked.
Read the case file →Stonehenge was built by giants, raised by Merlin's magic, aligned to ley lines, or engineered by aliens, rather than by Neolithic Britons
Stonehenge, the ring of standing stones on Salisbury Plain in Wiltshire, is one of the most studied prehistoric monuments on Earth, and also one of the most mythologized. For centuries its sheer scale, some sarsens weigh more than 30 tons, and the puzzle of how bluestones reached it from 150 miles away invited explanations larger than life: that giants assembled it, that the wizard Merlin flew the stones from Ireland, that it sits on a grid of earth-energy ley lines, or that extraterrestrials supplied the know-how. This case file separates the documented record (a monument built in stages by Neolithic and early Bronze Age communities, with stone sources, construction methods, and functions now partly reconstructed by archaeology) from the rated claim (that its origin was supernatural, mystical, or alien). On the evidence, the fringe claims are debunked, while the real and still-unsettled questions about transport and intent are noted for what they are.
Read the case file →The crew of the Carroll A. Deering vanished through piracy, mutiny, or foul play off Cape Hatteras
A five-masted American schooner found run aground with all sails set on Diamond Shoals off Cape Hatteras in 1921, abandoned by its entire crew, its lifeboats, log, and navigation gear gone but a meal still under preparation in the galley: a real case that drew a five-agency federal investigation and later fed a century of piracy, mutiny, and Bermuda Triangle lore.
Read the case file →A large unknown animal, often described as a plesiosaur, lives in Nahuel Huapi Lake in Argentine Patagonia
Nahuel Huapi is a long, deep, wind-swept glacial lake on the eastern flank of the Andes, wrapped by Argentina's oldest national park and overlooked by the resort town of San Carlos de Bariloche. For at least a century it has carried a Loch Ness style legend: a large aquatic creature, nicknamed Nahuelito, glimpsed as a hump, a serpent, or a long neck breaking the surface. The story draws on genuinely old indigenous traditions of a water being, gained its modern shape in 1922 when the director of the Buenos Aires zoo organized a widely reported expedition, and has been refreshed by sporadic sightings and anonymous photographs ever since. This case file separates the documented record (real sightings reports, a real expedition, a real tourism legend) from the rated claim (that an actual unknown animal lives in the lake). No specimen has ever been produced, the plesiosaur image is biologically implausible, and the surviving photographs lack provenance. The verdict on the animal is unproven.
Read the case file →An entire family was murdered on an isolated Bavarian farmstead
On an isolated farmstead north of Munich, six people (three generations of one family plus a maid who had arrived hours earlier) were beaten to death with a farm mattock in the spring of 1922. For days afterward someone fed the animals, ate the food, and kept the chimney smoking while the bodies lay where they fell. The killer was never identified. Around the crime clings a set of strange preceding events (footprints in the snow leading to the house but not away, unexplained noises in the attic, a maid who fled claiming the place was haunted) that has kept Hinterkaifeck one of Europe's most examined cold cases.
Read the case file →A white, furry, trunked sea monster fought two killer whales off Margate, South Africa, in 1924 and washed ashore as an unknown creature
On 25 October 1924, holidaymakers and residents at Margate, a resort town on the Natal south coast of South Africa, reported watching a huge pale animal fight two killer whales in the surf for hours. One witness, farmer Hugh Ballance, likened it to a giant polar bear. Days later a large carcass came ashore and remained on the beach for roughly ten days, where beachgoers measured it and marveled at its apparent white fur and a trunk-like projection. No scientist examined it before it was washed back out to sea. Decades of retellings turned the episode into Trunko, a named cryptid drawn as a white, furred beast with an elephantine trunk and a lobster-like tail. This case file separates the documented record (a real 1924 sighting and beached carcass that entered local folklore) from the rated claim (that the carcass was a genuine unknown species). When photographs taken in 1924 resurfaced in 2010, they showed no trunk and no fur, only a formless mass consistent with a rotted whale, a globster. On the literal-creature claim the verdict is debunked.
Read the case file →A giant venomous worm, the olgoi-khorkhoi, lives beneath the Gobi Desert and kills at a distance with acid and electricity
The Mongolian death worm, known in Mongolian as olgoi-khorkhoi (roughly “large intestine worm,” because it is said to resemble a length of cattle gut), is a creature of Gobi Desert folklore: a thick, dark red, headless, limbless worm two to five feet long that supposedly surfaces after rain in the hottest summer months and kills anything nearby by spitting a corrosive yellow venom or delivering an electric shock. Nomads have described it for generations, and the explorer Roy Chapman Andrews recorded the tale in the 1920s while leading fossil-hunting expeditions across Mongolia. This case file keeps two things apart. The documented record is the folklore itself, which unquestionably exists and is worth taking seriously as culture. The rated claim is that the animal is literally real with the powers attributed to it. On that question, despite expeditions equipped with everything from Dune-inspired ground thumpers to small explosives, no physical evidence of any kind has ever surfaced, and the verdict is unproven.
Read the case file →Edward Leedskalnin built Florida's Coral Castle using a lost anti-gravity or magnetic technology to levitate its megalithic stones
Coral Castle, near Homestead, Florida, is a garden of megalithic sculpture built single-handedly by Edward Leedskalnin, a slight Latvian immigrant who stood barely five feet tall and weighed around a hundred pounds. Over nearly three decades he quarried, carved, and raised more than 1,100 tons of oolite limestone into walls, towers, a working sundial, a Polaris telescope, and a nine-ton revolving gate balanced so finely a child could once push it open. He did the heavy work after dark, told no one his method, and left behind a phrase he liked to repeat: that he understood the laws of weight and leverage and knew the secrets of the people who built the pyramids. Because he kept his method secret and because the scale seems impossible for one man, a legend took hold that he had rediscovered anti-gravity or a lost magnetism and floated the stones into place. This case file separates the documented record (an extraordinary feat of solitary, patient engineering) from the rated claim (that it required a physics unknown to science), which the evidence debunks.
Read the case file →The Plain of Jars: thousands of giant stone jars scattered across Laos whose true purpose has never been explained
On the rolling uplands of the Xieng Khouang plateau in north-central Laos lie more than 2,100 tubular stone jars, some taller than a person and weighing several tonnes, clustered across roughly ninety sites. Carved from sandstone, granite, and conglomerate and hauled from quarries kilometres away, they have stood for two to three thousand years with no inscriptions and no written record of who made them or why. Local legend says a race of giants brewed rice wine in them; the French archaeologist Madeleine Colani argued in the 1930s that they were funerary, and modern Australian-Lao excavations have found human remains, secondary burials, and grave goods that support her. This case file separates the documented record (a genuine, datable Iron Age megalithic site) from the rated claim (that the exact purpose of the jars has been established). The funerary reading is strong but not conclusive, and the giants tradition is folklore, so on the question of purpose the verdict is unproven.
Read the case file →The jackalope, a horned rabbit of the American West, is a real living animal rather than a taxidermy invention
The jackalope is the horned rabbit of American folklore: a jackrabbit crowned with the antlers of a deer or pronghorn, immortalized on postcards, barroom walls, and a 13-foot statue in Douglas, Wyoming. Its modern form is a documented taxidermy creation, first mounted around 1932 by the Herrick brothers of Douglas and manufactured by taxidermists ever since. Almost no one insists the animal is literally real, yet the legend sits atop something genuinely strange. Real rabbits do occasionally sprout horn-like keratin growths, the work of the Shope papillomavirus, described by virologist Richard Shope in the 1930s; and horned hares appear as supposedly real creatures in European natural-history texts going back to the 1500s. This case file separates the documented record (a novelty mount, a real virus, and an old folklore tradition) from the rated claim (that a living horned-rabbit species roams the plains). On the evidence, that claim is debunked, while the virus and the folklore are treated as the real and interesting phenomena they are.
Read the case file →A large, unknown sea serpent named Cadborosaurus lives off the Pacific coast of British Columbia
Cadborosaurus, affectionately called Caddy, is a sea serpent said to swim the waters off British Columbia and the wider North Pacific. Witnesses over the past century have described a long, snakelike body with a horse- or camel-like head, a slender neck held above the surface, a series of humps or coils, and small flippers, at lengths reported anywhere from a few metres to fifteen or more. The name dates to 1933, when a Victoria newspaper editor attached it to a creature that coastal First Nations had described in oral tradition and art for far longer. This case file separates the documented record (real folklore, real eyewitness reports, and one real 1937 carcass photograph) from the rated claim (that a single large marine animal unknown to science lies behind them). On the evidence, that claim is unproven: the sightings are anecdotal, the physical evidence is disputed and now lost, and no verified specimen has ever surfaced.
Read the case file →The Loch Ness Monster is a real creature in a Scottish lake
A vast, deep, peat-darkened loch in the Scottish Highlands is said to hide a large unknown animal, possibly a surviving plesiosaur. Its most iconic photograph turned out to be a toy submarine, and a 2019 DNA survey of the entire loch found no evidence of any reptile in the water.
Read the case file →The Cleveland Torso Murders were solved, and the killer's identity was known but never brought to justice
Between roughly 1934 and 1938, at least a dozen people were murdered in Cleveland, Ohio, most of them dismembered and left in and around the ravine known as Kingsbury Run. The press called the unknown killer the Mad Butcher of Kingsbury Run. Many of the dead were never identified. The city's celebrated Safety Director, Eliot Ness, took a hand in the investigation, yet no one was ever convicted, and the case remains officially open. Over the years a strong claim has grown up around it: that the murders were effectively solved, that Ness personally identified the killer as a local physician, Dr. Francis Sweeney, and that a prosecution was quietly abandoned. This case file separates the documented record (a real, grim, unsolved series of killings) from the rated claim (that the killer's identity was established and suppressed). On the evidence, that claim is unproven. The main suspects are long dead, neither was ever proven guilty, and the victims deserve to be remembered with more care than the folklore usually affords them.
Read the case file →Wealthy financiers plotted a fascist coup against Roosevelt in 1933
In 1934, retired Marine Corps Major General Smedley Butler told Congress, under oath, that a group of wealthy men had approached him to lead half a million veterans on Washington and force Franklin Roosevelt into a figurehead role. A House committee said it had verified much of his story. No one went to prison, and historians have argued for ninety years about how real the danger actually was.
Read the case file →Amelia Earhart survived her 1937 disappearance
The world's most famous aviator vanished over the Pacific in 1937 chasing an island the size of a golf course, and whether she died on impact or lived days, weeks, or years longer remains, honestly, unknown.
Read the case file →A giant spider called the J'ba Fofi, with a leg span of several feet, lives undiscovered in the rainforests of the Congo
The J'ba Fofi (a Baka phrase usually glossed as "giant spider") is a cryptid reported from the rainforests of Cameroon and the Democratic Republic of the Congo. In folklore it is a brown, tarantula-like spider with a leg span of three to four feet, sometimes said to reach five or six, that builds leaf-covered lairs and strings near-invisible trip-lines across game trails to catch prey as large as small forest antelope. The best-known Western account dates to 1938, when the explorers Reginald and Margurite Lloyd are said to have watched a large spider cross a jungle trail in the Belgian Congo. This case file separates the documented record (a genuine Indigenous tradition and a handful of anecdotal reports) from the rated claim (a literal, undiscovered spider several feet across). On the evidence, the existence claim is unproven: it rests entirely on stories, produces no specimen, and describes an animal that the biology of spiders makes extremely unlikely at the stated size.
Read the case file →The "Baghdad Battery" proves that ancient Mesopotamians generated and used electricity two thousand years ago
In the 1930s, near Khujut Rabu on the outskirts of Baghdad, excavators recovered small ceramic jars each fitted with a rolled copper cylinder and an iron rod, held in place with a bitumen (asphalt) plug. In 1938 Wilhelm Konig, the Austrian-born director of the Iraqi antiquities museum, suggested the assembly resembled a galvanic cell and might have been used to electroplate precious metal. From that single suggestion grew a durable popular claim: that the people of Parthian or Sasanian Mesopotamia possessed working batteries and used electricity roughly two millennia before Alessandro Volta. This case file separates the documented record (the objects are genuine and, with an acidic liquid inside, can generate a small voltage) from the rated claim (that they were designed and used as electrical devices, proving lost ancient electricity). On the archaeological evidence, the electricity claim is debunked, while the objects themselves remain a real and interesting puzzle about ancient craft and ritual.
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