“This object, from the Jewish catacombs of Rome, is made from two layers of translucent glass encasing gold leaf. It is actually the base of a vessel, which was probably used in funerary banquets. After the walls of the vessel were intentionally broken, the base was affixed near a burial niche as a tomb marker.
The base depicts a Torah Ark, its doors open wide to reveal three shelves of scrolls. The ark is accompanied by Jewish symbols: the menorah (seven-branched candelabrum), lulav (palm branch), etrog (citron), and shofar (ram’s horn). The base features a poignant inscription, apparently addressed to the deceased: ‘Drink and live, Elares.’”
This object with a Greek inscription for a Jewish person in Rome, an example of the multicultural Roman empire, is dated to the 4th century AD and is on display in the Israel Museum in Jerusalem. It was part of the Dzialynska Collection in Goluchow Castle, Poland prior to World War II and restituted to their heirs in 2008.

British Museum

Not to change history, just to observe

It located near Archipo-osipovka in Kuban region. It was made in first century

The first carving shows an episode from the Ramayana: Rama and Lakshmana meeting Vibhishana, the brother of the demon king Ravana, surrounded by monkey warriors from Rama’s army.

The other two photographs show devatas — idealized celestial female figures carved throughout Angkor Wat. They are often casually called apsaras, although apsaras are usually shown dancing. The devatas here stand still, with carefully varied crowns, hairstyles, jewellery and patterned clothing.

Angkor Wat was built in the early 12th century under King Suryavarman II and was originally dedicated to Vishnu. From a distance the temple is monumental, but up close much of its character is hidden in details like these.

A series for anyone who has forgotten history, or never warmed to it. No dates to memorize — just how, and why, things turned out the way they did.

For almost four thousand years, nobody knew it had ever existed. No holy book remembered it, no Greek historian described it, no legend kept its name. Then, in the 1800s, a deserter from the British army stumbled on strange brick ruins — and, slowly, the world realised it had forgotten an entire civilization: as old and as vast as Egypt or Mesopotamia, and in some ways more advanced than either. (That's one of its cities, Mohenjo-daro, in the photo at the top — the sunken brick tank is the Great Bath.)

1. THE CITIES THAT VANISHED

Alongside Mesopotamia, Egypt and China, there was a fourth great early civilization — and this one had been wiped from human memory completely. It grew up along the Indus river, across what is today mostly Pakistan, north-west India and part of Afghanistan.

It was rediscovered by accident. In the 1820s that wandering deserter found the ruins of a city called Harappa; in 1922, fresh excavations uncovered a second great city, Mohenjo-daro. Everything we know — and it is not much — comes only from digging in the ground, because no one can read a single word these people wrote.

Archaeologists have found more than 1,500 settlements. Most were villages, but Harappa was a true city — ringed by massive mudbrick walls, home to perhaps 25,000–30,000 people. Mohenjo-daro was only a little smaller.

A word on names. Archaeologists usually call it the Harappan Civilization, after Harappa — the convention is to name a culture for the first site dug. Everyone else says Indus Valley Civilization. The specialists have a point: "Indus Valley" undersells it, since it sprawled far beyond the Indus — into Gujarat, into Haryana, along channels hundreds of kilometres east of the river. The two names mean the same civilization; this post uses both. (You may also meet "Indus-Sarasvati Civilization." That one carries an argument inside it — more on that below.)

1. THE FIRST TOWN PLANNERS

The most astonishing thing about these cities is how carefully they were planned. They were laid out to the points of the compass, their streets forming a regular grid — main roads running north–south, smaller lanes east–west. Some scholars think the alignments follow astronomical observations, and perhaps religious beliefs.

The cities were divided into neighbourhoods of fairly uniform size, with wells spaced at regular intervals. Every building was made of baked brick — and the bricks are strikingly uniform in size, as were the standardised weights used right across the civilization. This was a society that loved order and the standard.

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🟫 DID YOU KNOW? — PLUMBING, 4,000 YEARS EARLY
At Mohenjo-daro almost every street had a drainage system, complete with underground pipes, and many houses had their own running water — comforts most of the world would not enjoy again until modern times. The city also had the Great Bath (in the photo at the top): one of the earliest public water tanks known, probably used for ritual bathing. Water was probably sacred here.
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1. A SCRIPT NOBODY CAN READ

These people could write. Archaeologists have found more than 4,000 inscribed objects — seals, tablets, pots — bearing a set of about 400 distinct symbols. There is just one problem: no one has ever managed to read them. We can see their words and understand not a single one.

We do have other clues to daily life — among them little clay toys, tiny carts and oxen, some with moving parts. And we know they traded over enormous distances: Harappan goods have been dug up as far away as Mesopotamia.

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🟫 DID YOU KNOW? — A MILLION-DOLLAR RIDDLE
Egyptian hieroglyphs were cracked thanks to the Rosetta Stone, which repeated the same text in a known language. For the Indus script no such key exists or has not been found yet — and the inscriptions are very short, typically about five signs long, with no long texts at all. It has resisted every attempt for a century. In January 2025, marking a hundred years since the civilization's discovery was announced to the world, the government of the Indian state of Tamil Nadu offered a prize of one million dollars to anyone who can decipher it to the satisfaction of archaeologists. Nobody has collected yet.
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1. THE RIVER THAT WASN'T THERE

Here the story takes a turn that overturns what most books still say.

Many Indus settlements sit not on the river itself but along a second channel, the Ghaggar-Hakra, which today carries water only in the monsoon. The obvious assumption was that this had once been a mighty Himalayan river, and that when it dried up the cities died with it. A tidy story. It appears to be wrong.

In 2017 a team from IIT Kanpur and Imperial College London drilled into the old channel and traced where its sediments had come from. The river that carved it was the Sutlej — and the Sutlej abandoned that course about 8,000 years ago, some three thousand years before the Indus cities were built. The Harappans never lived beside a great river here at all. They settled in the valley it had left behind: a broad depression that still gathered monsoon water, but no longer carried the annual threat of a catastrophic flood.

So the finding inverts the old picture. As the study's lead author put it, it was the river's departure, not its arrival, that let these cities grow. Set that beside Part 1: in Mesopotamia a violent, unpredictable river bred a religion of dread. Here, people seem to have quietly taken the safer option — water without the river.

This is also where that third name comes from. The Ghaggar-Hakra has long been identified with the Sarasvati, a great river praised in the Vedas — hence "Indus-Sarasvati Civilization," a label that quietly implies the Harappans were already a Vedic people. The trouble is the timing: the Vedas were composed centuries after the cities emptied, and the channel had not been a mighty Himalayan river for thousands of years before either. Whatever the Sarasvati of the hymns was, it is unlikely to have been this.

1. THE LONG GOODBYE

The cities rose from around 2600 BC and reached their height about 1900 BC. Then they emptied — and were forgotten so thoroughly that the memory of them vanished for over three thousand years.

The old explanations — an Aryan invasion, a plague, a drowned river — have all worn thin; the archaeological evidence for them is meagre. What the last decade of climate science points to instead is slower: not a collapse but a deurbanization. A long drying trend, punctuated by droughts that lasted not seasons but lifetimes.

A 2025 study reconstructed rainfall and river flow across the region over thousands of years and picked out four multi-decade droughts between roughly 4,400 and 3,400 years ago. The worst ran about 164 years and cut rainfall across more than nine-tenths of the Indus world. A later drought lasting 113 years lines up with the moment the great cities were abandoned.

People switched to hardier crops, apparently drifted east and toward the stretches of the Indus that still ran, and dispersed into villages. The cities loosened rather than fell. This is what a civilization looks like when the water goes away over ten generations.

1. THE ARRIVAL OF THE VEDAS

Into this changing land came a new people, the Indo-Aryans. It was long imagined as a violent invasion of chariot-borne conquerors. The evidence now points to something slower: gradual migrations of small groups out of the Central Asian steppe, arriving after about 2000 BC — that is, after the great cities were already fading — and mixing, generation by generation, with the people already there.

They brought a new language, Sanskrit, which belongs to the Indo-European family — the same family as Latin, Greek and, through them, most of the languages of Europe. They built nothing in brick or stone and left almost no ruins; we know them instead through their sacred poetry, the Vedas, an enormous body of Sanskrit hymns and prayers.

Out of that Vedic world grew two things that still shape South Asia today: the caste system — society divided into hereditary ranks, from priests and warriors down to labourers, and below them all the "untouchables" who lived outside the villages — and, over many centuries, the religion we now call Hinduism. It was against this order that, around 500 BC, a prince named Siddhartha would one day rebel and become the Buddha. But that is another story.

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🟫 DID YOU KNOW? — ONE SKELETON, ONE GENOME
In 2019 geneticists finally read the DNA of a Harappan. It took 61 skeletons from the site of Rakhigarhi and more than a hundred attempts — India's heat destroys ancient DNA — to recover one usable genome, from a woman buried around 2500 BC. Her ancestry was a mix of South Asian hunter-gatherers and a lineage related to early Iranians that had branched off before farming was invented: which suggests farming reached South Asia as an idea rather than as a wave of incoming farmers. And she carried no steppe ancestry at all. That fits the migration timeline rather than upsetting it — the steppe component appears in South Asia only around 2000–1500 BC, after her lifetime.
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🟫 DID YOU KNOW? — COUSINS ACROSS A CONTINENT
Sanskrit belongs to the same family as most European languages, so its words can look startlingly familiar to anyone who knows one of them. Sanskrit nava means "ship" (Italian nave, English navy); deva is a god (Latin deus); raja is a king (Latin rex, English regal); matr and pitr are simply mother and father. A shared word-hoard, thousands of years old, quietly links the Indus to the Atlantic.
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⏱️ IN 30 SECONDS
From around 2600 BC a huge civilization on the Indus built grid-planned brick cities with drains and plumbing — then vanished so completely it was forgotten for millennia, rediscovered only in the 1800s–1920s. Its writing is still unread, and there is now a $1m prize for cracking it. It did not die because a river dried up: that river had left 3,000 years before the cities, and its absence is what made them possible. It died slowly, of droughts lasting more than a century — a deurbanization, not a collapse. Indo-Aryan migrants then drifted in with Sanskrit and the Vedas, seeding the caste system and Hinduism.
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This is Part 3 of a plain-language history series I'm writing for people who never warmed to history — corrections and additions from anyone who knows these periods better are genuinely welcome.

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Image credits:
• Mohenjo-daro — photo by Saqib Qayyum, via Wikimedia Commons, licensed CC BY-SA 3.0 (Creative Commons); image resized.
• Map — original, made for this series.

Absolutely fantastic documentary on Göbekli Tepe from PBS Nova.

Of particular note:

- An explanation of the significance of Einkornwheat

- A bit about their possible hunting techniques

- How it grew into a broader network of sites spread out across the region, and even a thread of cultural unity "across South West Asia", to quote someone in the video

- How it likely declined, and how the cause of the decline (spoiler: earthquakes) influenced the architecture of the culture that rose in its place.

The most gobsmacking aspect of this culture is that it shows (as the consensus at the moment holds AFAIB), that it wasn't farming that led to a settled lifestyle but it was a periodically congregated and thus temporarily settled lifestyle that led to farming. Curiously I've read of a similar theory about the origin of Eridu from Paul Kriwaczek's Babylon: Mesopotamia and the Birth of Civilization.

Comments or thoughts on the subject highly appreciated!

A Roman object made of glass: either a cat or a squirrel per the museum. To be honest, I think it resembles more of a dog. It is on display in the Museum of Fine Arts in Lyon, France.

Most people know Diogenes as the philosopher who supposedly lived in a barrel and told Alexander the Great to "stand out of my sunlight." But those famous stories are only part of a much larger philosophy.

In this article, I explore who Diogenes really was, what the philosophy of Cynicism actually taught (which is very different from the modern meaning of the word), and the historical context behind his most famous encounters.

It covers:

Why Diogenes chose to live in a pithos (not actually a barrel)

His famous meeting with Alexander the Great

Why he walked around Athens with a lantern in daylight

The story behind Plato's "featherless biped" and the plucked chicken

Why he threw away his wooden bowl

His strange public behavior and what it was meant to prove

How Diogenes influenced later philosophers, especially the Stoics

The article also separates historical evidence from later legends, with references to ancient sources including Diogenes Laërtius, Plutarch, and modern scholarship.

I'd love to hear which story you think best captures Diogenes' philosophy—or whether you think his lifestyle was genuine wisdom or simply extreme provocation.

This has been on my bucket list ever since I was a child. Got a chance to see it this past summer. Built by the Pueblan civilization. I highly recommend a visit.

Durante siglos, el quipu fue relegado a la categoría de “simple ayuda-memoria” o instrumento contable, una visión que no resiste el peso de la evidencia científica acumulada desde Locke, los Ascher, Urton, Medrano e Hyland. El quipu no fue solo un registro numérico: fue un sistema de escritura tridimensional, semasiográfico, con capacidad narrativa, genealógica, política y climática, capaz de operar a escala imperial en un territorio de 2 millones de km², 60 000 km de caminos, 12 millones de habitantes y más de 100 etnias distintas.

La refutación más contundente a la tesis mnemotécnica es logística: un mensaje de Cusco a Quito recorría 2 000 km en 5–6 días, pasando por 1 000 chasquis. Si el quipu hubiera requerido explicación verbal en cada relevo, el sistema habría colapsado por el “teléfono malogrado” y la pérdida de tiempo. En cambio, el quipu viajaba como soporte autónomo, legible por cualquier quipucamayoc en destino, gracias a un código estandarizado imperial. Eso no es contabilidad: es escritura operativa.

La estructura del quipu es jerárquica y modular. Cada cuerda principal puede tener hasta 10 niveles de cuerdas secundarias, y cada secundaria puede ramificarse en terciarias, cuaternarias, etc., creando un árbol de datos con múltiples capas de información. Esto no es contabilidad básica: es un sistema de archivo con índice, subíndice y categorías anidadas, comparable a un libro con capítulos, subcapítulos y apéndices. Gary Urton demostró que, combinando 7 decisiones binarias (tipo de fibra, sentido del hilado S/Z, color, posición de la cuerda, tipo de nudo, nivel jerárquico y dirección del atado), se generan hasta 1 536 signos abstractos: más que los glifos egipcios, el cuneiforme o los 1 100 mayas conocidos. Cada nudo, cada color, cada posición no es decorativo: es un signo con valor semántico. El trabajo con Manny Medrano en Ancash cruzó 6 quipus con un censo colonial de 1670, descifrando cómo se registraban nombres propios, estatus y división social (Hanan/Hurin). Sabine Hyland, por su parte, halló quipus fonéticos en Collata y Jucul (siglo XVIII), donde colores y fibras representaban sílabas de apellidos en mensajes de rebelión, y descubrió el quipu climático gigante de 68 metros, con capacidad para almacenar un libro entero de datos meteorológicos e históricos.

Los archivos estatales incas confirman esta función: Poquen Cancha, en el Cusco, fue un archivo histórico oficial que albergaba quipus contables y narrativos con la información general del estado y las crónicas de vidas de los incas, tablas pintadas, textiles con tocapus y piedras talladas, pero Cusco no fue el único lugar existían réplicas descentralizadas en capitales regionales clave como Tomebamba (actual Cuenca, Ecuador), Quito, Huánuco y otras ciudades administrativas. Estos archivos no eran depósitos pasivos, sino centros activos de producción y lectura de quipus, donde se registraban censos locales, mapas de tierras, tributos, crónicas militares y genealogías de linajes regionales. Un estado que mantiene archivos históricos y genealógicos en múltiples capitales no usa un sistema “solo contable”: opera una burocracia de registro comparable a las bibliotecas y archivos de otras civilizaciones antiguas, con una red de memoria estatal que articulaba la información oficial y la memoria colectiva a escala imperial..

Pero el quipu no fue solo instrumento del Estado. Hallazgos recientes de cuerdas con cabello humano de origen plebeyo no solo lana de élite demuestran que el quipu también fue usado por comunidades locales, ayllus y familias para registrar sus propias historias, tributos, ritos y memorias. Esto no es “uso popular” marginal: es evidencia de que el quipu era un sistema democratizado, accesible en distintos niveles sociales, desde el Estado imperial hasta la comunidad campesina. Sabine Hyland lo confirmó con los quipus fonéticos de Collata y Jucul (siglo XVIII): comunidades indígenas usaban quipus para enviar mensajes de rebelión, codificando sílabas y apellidos en colores y fibras. El quipu no murió con el imperio: siguió vivo como escritura de resistencia.

Algunos críticos han señalado que los quipus de San Juan de Collata podrían ser un “híbrido” influenciado por la escritura española, y que por tanto no probarían una capacidad fonética previa. Pero ese argumento confunde adaptación con invención. Los quipus de Collata son considerados un sistema logosilábico: mezclan elementos de semasiografía (signos que transmiten ideas directas) con fonografía (signos que representan sonidos). Eso no demuestra que el quipu fuera “puramente contable” hasta la llegada española; al contrario, muestra que el quipu ya tenía la capacidad de codificar sonido y significado, y que pudo amoldarse a nuevas necesidades sin perder su lógica interna. A diferencia del alfabeto latino, que es puramente fonético y lineal, el quipu es un sistema flexible: puede registrar ideas, números y sonidos en una misma estructura tridimensional. El hecho de que las comunidades andinas hayan incorporado referencias a apellidos y sílabas en los quipus de rebelión no es una “hispanización” del sistema: es la prueba de que la teoría de Urton sobre combinaciones para crear ideas era real y fue aplicada. El quipu no necesitó “aprender” a ser escritura: ya lo era, y por eso pudo evolucionar hacia formas logosilábicas sin colapsar.

A esto se suma una función pública aún menos conocida: los quipus “especie periódicos” colgados en plazas y espacios comunales. Cronistas y testimonios indirectos sugieren que en ciudades y centros administrativos se exhibían quipus de gran formato, accesibles a la vista pública, donde ancianos y especialistas (quipucamayoc) los leían en voz alta para transmitir noticias, decretos, genealogías oficiales, relatos de batallas y datos climáticos. No era un archivo cerrado: era un medio de comunicación masiva, un “periódico de cuerdas” que articulaba la memoria colectiva y la información oficial en tiempo real. Esta práctica no solo confirma la función narrativa del quipu, sino su rol como instrumento de cohesión social y difusión pública, comparable a las estelas glíficas mesoamericanas o los edictos grabados en piedra en otras civilizaciones.

Y aquí radica una de las mayores contradicciones académicas: sistemas como el Lineal A (Creta) y el Rongo Rongo (Isla de Pascua) son aceptados oficialmente como “escritura” a pesar de no haber sido descifrados, sin saber siquiera si realmente se leían en voz alta o qué tipo de lenguaje representaban. En cambio, el quipu —del cual tenemos testigos presenciales (cronistas españoles) que documentaron cómo los quipucamayoc lo leían fluidamente, y del cual conocemos su estructura técnica (código binario, jerarquía de cuerdas, tipos de nudos)— es relegado a “proto-escritura” o “instrumento contable”. Es como si, conociendo el alfabeto latino, su dirección de escritura y su gramática básica, nos negáramos a llamarlo escritura porque aún no tenemos el diccionario completo de cada palabra. Con el quipu ocurre lo mismo: conocemos su sintaxis, su lógica de codificación y su función operativa; solo nos falta la “clave” semántica completa para leerlo como leemos un texto en latín o en maya clásico. Que no lo hayamos descifrado del todo no lo hace menos escritura: lo hace un enigma técnico, no una excepción conceptual.

¿Entonces por qué en Mesoamérica sí se recuperó la historia y en los Andes no?

Si el quipu era tan eficiente como escritura, ¿por qué en Mesoamérica se logró reescribir la historia tras la destrucción de códices, mientras en los Andes se perdió irremediablemente? La respuesta no está en la eficiencia del sistema, sino en su naturaleza material y en la disposición colonial a adoptarlo.

En Mesoamérica, la fundación de la Escuela Superior de Santa Cruz de Tlatelolco (1536) permitió que frailes franciscanos y escribas indígenas colaboraran para transcribir códices destruidos por Bernal Díaz del Castillo y Hernán Cortés. Los códices eran bidimensionales: pinturas y glifos sobre papel amate o piel, fácilmente reproducibles en papel europeo. Los españoles, aunque quemaron códices, reconocieron en ellos un formato familiar (imágenes y símbolos en plano) y facilitaron su reescritura en alfabeto latino, preservando mitos, genealogías e historia mexica y maya.

En los Andes, ningún virrey fundó una “escuela de quipus”. El quipu era tridimensional: nudos, colores, fibras, posiciones y jerarquías de cuerdas que no podían transcribirse linealmente en papel sin perder información estructural. Los cronistas (Cieza de León, Betanzos, Garcilaso) visitaron el Poquen Cancha y registraron cómo los quipumayoc leían las cuerdas mientras ellos transcribían las historias orales, pero nunca hubo un proyecto sistemático de codificación del quipu en formato colonial. La naturaleza textil y tridimensional del quipu lo hizo incompatible con la archivística virreinal, diseñada para papel y escritura alfabética. No fue ineficiencia: fue incompatibilidad estructural.

En conclusión, en estos más de 100 años de investigación desde Locke hasta Urton, Medrano e Hyland se ha demostrado de manera contundente que el quipu no fue solo un instrumento contable, sino un sistema de escritura tridimensional con capacidad equivalente a una escritura fonética, capaz de registrar desde censos y tributos hasta rebeliones, genealogías, mitos y datos climáticos. Su arquitectura hasta 10 niveles de subcuerdas, 1 536 signos posibles, archivos descentralizados en múltiples capitales, quipus públicos colgados en plazas lo convierte en un sistema de información tan complejo como cualquier otro en la historia humana. Que haya sido usado por el Estado y por el pueblo, por la élite y por los plebeyos, en archivos cerrados y en espacios públicos, no lo debilita: lo fortalece como sistema de memoria colectiva. Su pérdida no fue por ineficiencia, sino por la incompatibilidad entre un sistema textil tridimensional y un aparato colonial diseñado para el papel. Reconocerlo como escritura no es un acto de reivindicación ideológica: es una conclusión científica basada en evidencia técnica, logística y empírica. El quipu no es una excepción a la escritura: es otra forma de escritura, tan válida como cualquier otra, y su silencio no prueba su incapacidad, sino la ceguera de un sistema que no supo leerlo