File 023

Ten 'Out-of-Place' Artifacts That Supposedly Rewrite History

Out-of-place artifacts, or OOPArts, are objects said to be too advanced for their age: proof, supposedly, of lost super-civilizations or visitors from elsewhere. This file tests ten famous out-of-place artifacts, from a Greek gear machine to a spark plug in a rock, an Assyrian lens and a box of Roman puzzles. Each entry gets a verdict on the anomaly claim, not on the object itself. A recurring theme: when the real story comes out, ancient makers usually turn out to be cleverer than the legend gave them credit for.

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  • 4 solved
  • 1 unsolved
  • 5 debunked

Each square is one case, stamped with its verdict. How we decide verdicts

Opened October 12, 202622 sources
Case 1 of 10Antikythera, Greece2nd or early 1st century BC

The Antikythera Mechanism

In 1901, Greek sponge divers working a Roman-era shipwreck off the small island of Antikythera, between Crete and the Greek mainland, brought up a lump of corroded bronze. Inside it were gears. Nothing else with comparable gearwork survives from the ancient world, and for decades the object was the poster child for anyone arguing that the ancients had help.

Modern scanning has turned it into something better: a fully documented Greek machine. In 2005 the Antikythera Mechanism Research Project imaged all 82 known fragments with X-ray computed tomography. The 30 surviving bronze gears drove dials that tracked the sun and moon, predicted eclipses through the 223-month Saros cycle, followed a 19-year lunar calendar, and even tracked the four-year cycle of athletic festivals such as the Olympic Games. A pin-and-slot device mimicked the moon's speeding up and slowing down. In 2021 a University College London team published a reconstruction of its lost planetary display.

The machine speaks for itself, literally: its dials and covers carry Greek inscriptions, and its month names come from a Greek regional calendar. Scholars date its making to the second or early first century BC, and the ship probably sank not long after 70 BC. The real lesson is not that someone else built it. It is that Hellenistic astronomers and craftsmen were far more sophisticated than the surviving texts let on.

SOLVEDsigned in Greek

Verdict: SolvedReal and astonishing, but its Greek inscriptions, Greek calendar and Greek astronomy show exactly who built it; nothing about it is impossible for its time.

Your call?
Sources (3)
Case 2 of 10Khujut Rabu, near Baghdad, IraqFound 1936

The Baghdad Battery

The object is modest: a small clay jar holding a copper tube sealed with bitumen, with an iron rod inside. It turned up in 1936 at Khujut Rabu, near the ancient city of Ctesiphon. Two years later Wilhelm König, working at the Iraq Museum's laboratory, suggested it was a galvanic cell, perhaps used to electroplate jewelry. The idea spread fast, and the jar became known as the Baghdad Battery.

Fill a replica with vinegar or lemon juice and it does produce a small voltage, around a volt per jar. That is the whole case for ancient electricity, and it is thin. No wires, conductors or electrical devices have been found with it. The copper tube did not stick out past the seal, so there was nothing obvious to connect a wire to. The gilded objects König had in mind were apparently gilded with mercury and heat, a well-known ancient technique, not electroplating. The excavation records are poor, and the pottery style points to the Sasanian period rather than the earlier Parthian date König proposed.

Most archaeologists read it as a storage vessel for sacred scrolls or as a ritual object, since similar jars from nearby Seleucia and Ctesiphon are thought to have stored scrolls. University of Pennsylvania archaeologist William Hafford has argued it was a magical device for a prayer or curse. The jar itself has been missing since the 2003 invasion of Iraq.

DEBUNKEDno wires, no circuit

Verdict: DebunkedA jar that can make a trickle of current is not evidence of ancient electricity; no wires, devices or electroplated objects have ever been linked to it.

Your call?
Sources (2)
Case 3 of 10Ottoman Empire1513

The Piri Reis Map

In 1929, during work at Istanbul's Topkapi Palace, scholars came across a fragment of a world map drawn on gazelle skin. It was signed by Piri Reis, an Ottoman naval captain and cartographer, and dated 1513. Only about a third survives, showing the Atlantic with the coasts of Europe, Africa and South America. Its bottom edge, where the coast of South America bends sharply east, later became the most argued-over coastline in fringe literature.

The historian Charles Hapgood claimed that this southern coast was Queen Maud Land in Antarctica, mapped accurately without its ice. Since Antarctica's coast has been buried under ice for millions of years, that would mean someone surveyed it in deep prehistory. The theory became a staple of lost-civilization books.

Piri Reis, though, told readers exactly how he worked. Notes on the map say he compiled it from about 20 sources, including maps from the age of Alexander the Great, an Arab map of India, four Portuguese charts and a map by Columbus, which the notes say supplied the western coasts and islands. A simpler reading of the southern bend is that the coast was turned to fit the edge of the parchment, a common mapmaking compromise. What the map really shows is an Ottoman scholar with access to the newest European discoveries, synthesizing them within about 20 years of Columbus's first voyage.

DEBUNKEDhe listed his sources

Verdict: DebunkedThe map is genuine and impressive, but its maker named his sources, and nothing on it requires an ice-free Antarctica or a lost civilization.

Your call?
Sources (2)
Case 4 of 10Near Olancha, CaliforniaFound 1961

The Coso Artifact

On February 13, 1961, three rockhounds hunting geodes in the hills near Olancha, California in Inyo County, cut open a crusty stone and found something inside that was not a crystal. There was a ring of what looked like porcelain, a metal shaft at its center, and a hexagonal sleeve. The finders believed the stone was a geode at least 500,000 years old. If so, it held a machine part from long before humans were making anything of the kind.

The object passed through creationist and ancient-mystery books for decades. In 1999, Pierre Stromberg and Paul Heinrich took the surviving X-rays and photographs to spark plug collectors. Chad Windham, president of the Spark Plug Collectors of America, identified it as a 1920s Champion spark plug, and other collectors agreed. Its porcelain insulator, brass cap and layered copper gaskets matched Champion plugs of the period, plausibly from an engine such as a Ford Model T.

The rock was never a geode at all. Its crust was a soft nodule of rust and debris that formed as the plug corroded, helped along by corrosive dust blowing off the dry Owens Lake bed. Fossil shells in the crust proved nothing, since it also contained a nail and a washer. The original object went missing in the late 1960s.

SOLVEDa Champion plug, 1920s

Verdict: SolvedSpark plug collectors identified it as a 1920s Champion plug wrapped in a rust nodule, not a half-million-year-old geode.

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Sources (2)
Case 5 of 10Saqqara, EgyptAbout 200 BC

The Saqqara Bird

In 1898, excavators at Saqqara found a small wooden bird in the tomb of a man named Pa-di-Imen. Carved from sycamore and dating to about 200 BC, it weighs roughly 39 grams (under 1.5 ounces) and has a wingspan of about 7 inches (18 centimeters). It has no feet and no carved feathers, and its tail is vertical, like a rudder. To modern eyes, it looks a little like a model airplane.

That resemblance is the whole OOPArt case. Starting in the late 1960s, Khalil Messiha argued that the bird was a scale model of an Egyptian glider and that a horizontal tail had broken off. Models he built with a tail added flew briefly when thrown, and the popular press ran with the idea of pharaonic aircraft.

The trouble is that the original, as found, would not fly well. Without a horizontal stabilizer it is unstable, and a 2023 computer simulation by researchers in Bremen, Germany, found poor gliding performance and pitch instability. No full-size craft, no technical drawings and no texts describing flight have ever turned up in Egypt. Egyptologists see a more familiar object: a stylized bird, possibly a falcon, the form of gods such as Horus. Suggestions include a toy for an elite child, a weather vane, or an ornament from a sacred boat. Its exact purpose is uncertain, but nothing about it requires aviation.

DEBUNKEDno tail, no flight

Verdict: DebunkedA carved bird that flies poorly even in simulation is not evidence of Egyptian aircraft; its purpose is uncertain, but its maker's skill is not mysterious.

Your call?
Sources (2)
Case 6 of 10Ica, Peru1960s to 1970s

The Ica Stones

In 1966, Javier Cabrera, a physician in the desert city of Ica in southern Peru, received an engraved stone as a birthday present. He believed it showed an extinct fish, and he began collecting more. Soon he had thousands: smooth dark stones etched with people performing surgery and living alongside dinosaurs. Cabrera credited them to a lost race he called Gliptolithic Man and claimed it had come from elsewhere. By his death in 2001, an estimated 50,000 such stones were in circulation.

The source was not a lost race. After a BBC documentary and a Peruvian inquiry in the 1970s, a local farmer named Basilio Uschuya admitted he had been carving stones and aging them to sell to visitors. He later gave conflicting accounts about how many he had made. Journalists filmed local artisans turning out convincing copies in minutes with a dentist's drill, then rubbing them with animal dung and baking them in coals. When examined under magnification, the stones lacked the weathering an ancient carving would show.

The dinosaurs, meanwhile, look a lot like 1960s pop culture. The real loss is that the hoax crowded out Ica's genuine past. The Paracas and Nazca cultures of the region left superb textiles and pottery, but, as art historian Nancy Kelker has noted, no archaeological record of etched stones like these.

DEBUNKEDdentist drill and dung

Verdict: DebunkedA local carver admitted making stones for tourists, artisans reproduced them on camera, and the engravings show no ancient weathering.

Your call?
Sources (2)
Case 7 of 10Nimrud, IraqAbout 750 to 710 BC

The Nimrud Lens

In 1850, the British archaeologist Austen Henry Layard was digging in the North West Palace at Nimrud, a capital of the Assyrian Empire in what is now northern Iraq. Among the finds was a small oval of rock crystal, about 1.6 inches (4.2 centimeters) long, ground flat on one side and gently curved on the other. Held up to the eye, it magnifies, roughly threefold, with a focal length of about 4.7 inches (12 centimeters). It now belongs to the British Museum.

That property has made it a favorite exhibit for claims of lost optical technology. In 1999 Giovanni Pettinato of the University of Rome went furthest, proposing it was part of an Assyrian telescope and linking it to Assyrian descriptions of the planet Saturn. Most specialists on Assyria were unconvinced: the crystal is roughly ground, its focus is poor, it is pocked with natural flaws, and no surviving Assyrian text mentions a telescope.

The British Museum's own catalog calls it an inlay and judges its optical properties probably accidental. Layard reported finding it beneath fragments of blue glass from a decayed decorated object, which fits a piece of furniture or a box. Either way, the object shows real Assyrian skill: lapidaries who could grind and polish hard quartz into a smooth, even shape without modern machinery.

DEBUNKEDmuseum says inlay

Verdict: DebunkedIt can magnify, but crudely, and the British Museum considers it a decorative inlay; there is no evidence Assyrians built telescopes.

Your call?
Sources (2)
Case 8 of 10Temple of Hathor, Dendera, EgyptLate Ptolemaic period

The Dendera 'Light Bulbs'

Under the Temple of Hathor at Dendera, in Upper Egypt, lies a set of narrow crypts once reached through hidden trapdoors. On their walls are reliefs that look, to a modern viewer, startlingly like giant light bulbs: a long oval shape, a wavy line running through it, and what resembles a socket at one end, sometimes propped up by a pillar. Ancient-electricity enthusiasts call them the Dendera Lights and ask how the Egyptians lit their tombs without soot.

The joke actually started early. In 1894 the astronomer Norman Lockyer mentioned a colleague's offhand quip that electric lamps would explain the lack of soot in tombs. Later writers took it seriously. Archaeologist Kenneth Feder has pointed out the obvious gap: no bulbs, wiring or generators have ever been found in Egypt. Soot-blackened ceilings are, in fact, common in Egyptian temples.

The reliefs come with their own captions. The temple as it stands was built largely under Ptolemy XII and Cleopatra VII, and its crypt inscriptions identify the figures. The wavy line is a snake, the god Harsomtus, rising from a lotus flower inside an oval that may represent the womb of the sky goddess Nut. The texts give the statues' materials and heights, in palms and cubits. The crypts stored cult statues, and the scenes illustrate an Egyptian creation story, told in an elegant visual language of its own.

SOLVEDread the captions

Verdict: SolvedThe temple's own inscriptions identify the shapes as a snake god rising from a lotus, part of a creation scene, not electrical equipment.

Your call?
Sources (3)
Case 9 of 10Mexico, Europe and museum collections19th and 20th centuries

The Crystal Skulls

Skulls carved from clear quartz, some of them life-size, have been sold for more than a century as Aztec or Maya treasures and later credited with mystical powers and lost-civilization origins. The most famous, the Mitchell-Hedges skull, came with a story about being found beneath an altar in a ruined Maya city in what is now Belize. Two museum skulls, one at the British Museum and one at the Smithsonian, looked like the best candidates for genuine antiquity.

In 2008, Jane MacLaren Walsh of the Smithsonian and Margaret Sax of the British Museum published a study of both. They cast the tool marks in silicone and compared them under a scanning electron microscope with genuine Aztec and Mixtec rock crystal pieces. The ancient objects showed the shallow, irregular marks of hand abrasion with stone or wood tools. Both skulls showed the deep, regular cuts of rotary wheels, and the Smithsonian skull carried traces of a modern synthetic abrasive. The British Museum skull's quartz likely came from Brazil, Madagascar or the Alps, far outside Aztec trade networks.

Paper trails point to a French dealer, Eugène Boban, who sold several skulls in the late 1800s; Mexico's national museum judged one a fake in 1885. Walsh found that the Mitchell-Hedges skull bears marks of modern diamond-coated lapidary tools and called it decidedly 20th century. The genuine Aztec work, hand-ground the hard way, is arguably the more impressive.

SOLVEDrotary wheels gave it away

Verdict: SolvedMicroscope studies by the Smithsonian and British Museum found modern rotary-wheel tool marks; the famous skulls are 19th- and 20th-century workshop products.

Your call?
Sources (2)
Case 10 of 10Northwestern Roman Empire2nd to 4th century AD

The Roman Dodecahedra

Here is an object that really has stumped the experts. Roman dodecahedra are hollow bronze castings with twelve pentagonal faces, each pierced by a round hole, and a small knob at every corner. They range from about 1.5 to 4.5 inches (4 to 11 centimeters) across. About 130 are known, dating from roughly the second to fourth centuries AD, and most come from Gaul and the empire's other northwestern provinces. Oddly, none has turned up in Roman Italy.

The first recorded example was shown to the Society of Antiquaries of London in 1739. In 2023 a community dig at Norton Disney, in Lincolnshire, England, found one in excellent condition, about 3 inches (8 centimeters) tall, the 33rd known from Roman Britain. It had been thrown out with ordinary trash in an old quarry pit.

What were they for? No Roman text or image mentions them, and none carries letters or numbers. More than fifty explanations have been offered: surveying instruments, candleholders, gauges for checking coins, devices for knitting gloves, toys, a metalworker's showpiece, or tools for divination. Each runs into trouble. The knitting idea, popular online, sits awkwardly with the fact that the earliest known reference to that kind of knitting comes from the 1500s. The skilled casting is not in doubt. What the Gallo-Roman people who made them knew, and we do not, is what these objects were for.

UNSOLVEDfifty guesses and counting

Verdict: UnsolvedTheir age and Roman origin are secure, but no text, inscription or find context has revealed what the dodecahedra were used for.

Your call?
Sources (2)

Strip away the alien theories and most of these objects tell a better story: Greek astronomers building computers out of bronze, an Ottoman captain stitching together the newest maps on Earth, Egyptian priests writing captions for their own carvings. The one genuine puzzle in this file is a Roman object that someone, somewhere, knew exactly how to use.

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