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Fossilized dinosaur eggshells can preserve amino acids, the building blocks of proteins, over millions of years

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theconversation.com – Evan Thomas Saitta, Postdoctoral Scholar in Paleontology, University of Chicago – 2024-04-09 07:16:55

A dinosaur eggshell cross section, as imaged under fluorescence microscopy.
Evan Saitta

Evan Thomas Saitta, University of Chicago

As a scientist, lab work can sometimes get monotonous. But in 2017, while a Ph.D. student of paleobiology at the University of Bristol in the U.K., I heard a gleeful exclamation from across the room. Kirsty Penkman, head of the North East Amino Acid Racemization lab at the University of York, had just read the data printed off the chromatograms and was practically jumping up and down.

The instrument had detected telltale signatures of ancient amino acids in eggshell. Amino acids are the building blocks that make up protein sequences in living organisms. But this wasn’t just any eggshell; it was a fossil from a titanosaur, a giant herbivorous dinosaur that lived about 70 million years ago.

A line graph with about 20 sharp peaks
The chromatograph printout that Kirsty Penkman saw. Each peak represents an amino acid detected by the instrument during the analysis.
Evan Saitta

Not much organic material survives over millions of years, which limits scientists’ ability to study the biology of extinct organisms compared to modern ones, whose proteins and DNA can be sequenced. As Penkman’s enthusiasm suggested, these amino acids were extraordinary.

In fact, this result came unexpectedly amid our team’s efforts to test claims of near-pristine protein preservation in dinosaur bone. I had brought various fossil bones to Penkman, but the results suggested no original amino acids had been preserved, and that they were even contaminated by microbes from the environment they’d been buried in.

Testing eggshell fossils was not even in our original research plan.

Orphan fossil fragments

However, I had just seen that my colleague Beatrice Demarchi, Penkman and their team had detected short protein sequences in 3.8-million-year-old bird eggshell. I predicted that if dinosaur eggshells didn’t preserve any original proteins, then their bones likely wouldn’t preserve any either, and wanted to see whether that was the case. Luckily, we had a source of dinosaur eggshell.

Around 2000, many eggshell fragments were illegally exported from Argentina into the commercial market. As a fossil-obsessed child, I was even gifted a coin-sized fragment from a U.S. mineral store. Penkman and I tested that fragment, as well as another fragment from a European museum’s gift shop.

These fossil fragments in some ways gained scientific value because they didn’t belong to any museum collections. We didn’t have to worry about damaging them during the analysis. To our surprise, we had stumbled upon a rare opportunity to study ancient organic remains from a dinosaur.

Amino acids in eggshell

Prompted by this initial discovery, our large, international team analyzed more dinosaur eggshells from Argentina, Spain and China, using a wide variety of techniques. Although some eggshells preserved amino acids far better than others, the evidence overall suggested that these molecules were ancient and original, possibly ranging from 66 million to 86 million years old.

During life, proteins that helped to calcify the eggshell became trapped within the mineral crystals. The remaining amino acids we detected, however, consisted of free molecules that had broken off from their protein chains by reactions with water. We only detected a few of the most stable amino acids. Less stable ones were absent, as they had degraded away.

A figure showing the silhouette of a titanosaur, a dinosaur with a long neck and stocky legs, as well as ball and stick models of four amino acids and a chemical reaction where a protein and water turn into free amino acids.
A titanosaur, models of the four preserved amino acids, and the breakdown reaction from a protein sequence into free amino acids.
Arthur S. Brum (silhouette), Ben Mills (ball-and-stick models), V8rik (hydrolysis reaction)

The amino acids still preserved were what chemists call racemic. Amino acids can occur in left- or right-handed configurations. Living organisms regulate their amino acids such that they appear almost exclusively in the left-handed configuration. After the organism dies, amino acids can convert between handedness until they reach 50-50 mixtures of both configurations.

A 50-50 mix is known as racemic and suggests that the amino acids had separated from their protein chains very long ago.

A drawing of two hands holding two configurations of a chemical model. The two configurations mirror each other.
Left- and right-handed versions of amino acids. While so-called stereoisomers have the same chemical formula, they’re organized as mirror images of each other.
NASA

Calcite, an amino acid archive

Our dinosaur eggshell results showed more extreme degradation than seen in younger fossils of bird eggshell and mollusk shell. Our results also matched those from experiments that expose eggshell to heat in the lab, simulating degradation over thousands or millions of years.

Organisms reinforce these shells with a type of calcium carbonate mineral called calcite. Unlike the calcium phosphate that makes up bone, calcite can act as a closed system by trapping the products of proteins involved in calcification as they break down, including free amino acids separated from protein sequences. This closed system allowed us to observe the amino acids in our analyses.

Bird eggshell is even among the best materials to find preserved protein sequences in fossils, let alone free amino acids. Demarchi’s team has detected short, intact sequences of amino acids still bound in a chain from bird eggshell at least 6.5 million years old.

Other researchers have claimed to have found more ancient amino acids, as well as more extreme and less likely claims of preserved protein sequences. But, our study uses a wider range of methods and reports the best signal for stable molecules in a tissue we now know preserves molecules well.

Our dinosaur amino acids might hold the record for the oldest protein-related material yet found for which the evidence is very strong, and the first clear evidence from a Mesozoic dinosaur.

Using calcite to look back in time

The genetic sequence in DNA that is ultimately expressed in proteins provides a source code for organisms that scientists can study. But if only a subset of amino acids are preserved in the fossil, it’s like removing all but five letters from a book – little literary analysis is possible. So, what messages from ancient life might persist in these calcite time capsules?

One biologically informative signal might involve stable isotopes, which are atoms of the same element with different masses. Scientists can look at the stable isotope ratios of carbon, oxygen or nitrogen to learn about their source, such as the animal’s diet. Since eggshell calcite is a closed system, stable isotope ratios in their amino acids are more likely to come directly from the dinosaur, rather than outside contamination.

In future research, our team will use fossils to search even further back in time. Organisms other than egg-laying dinosaurs reinforced their tissues with calcite. For example, marine arthropods called trilobites that lived more than half a billion years ago had calcite in their eyes.

Studying older remains could help scientists understand the molecular changes that happen in fossils over long periods of time. Fossil calcite, Earth’s molecular time capsule, may send faint tales from long-gone life for researchers to better understand their biology.

The orphan eggshells used in our initial analysis found a happy ending. They eventually gained a new home at Argentina’s Museo Provincial Patagonico de Ciencias Naturales, a natural sciences museum in Patagonia, repatriated to the only province known to produce that type of eggshell microscopic structure.The Conversation

Evan Thomas Saitta, Postdoctoral Scholar in Paleontology, University of Chicago

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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Francis − a pope who has cared deeply for the poor and opened up the Catholic Church

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theconversation.com – Mathew Schmalz, Professor of Religious Studies, College of the Holy Cross – 2025-02-24 15:05:00

Francis − a pope who has cared deeply for the poor and opened up the Catholic Church

Pope Francis during the Palm Sunday Mass at St. Peter’s Square on April 2, 2023, in Vatican City.
Antonio Masiello/Getty Images

Mathew Schmalz, College of the Holy Cross

Pope Francis, who remains in critical condition and hospitalized as he battles pneumonia in both lungs, was elected pope on March 13, 2013, after the surprise resignation of Benedict XVI.

Prior to becoming pope, he was Jorge Mario Bergoglio, archbishop of Buenos Aires, and was the first person from the Americas to be elected to the papacy. He was also the first pope to choose Francis as his name, thus honoring St. Francis of Assisi, a 13th-century mystic whose love for nature and the poor have inspired Catholics and non-Catholics alike.

Pope Francis chose not to wear the elaborate clothing, like red shoes or silk vestments, associated with other popes. As a scholar of global Catholicism, however, I would argue that the changes Francis brought to the papacy were more than skin deep. He opened the church to the outside world in ways none of his predecessors had done before.

Care for the marginalized

Pope Francis reached out personally to the poor. For example, he turned a Vatican plaza into a refuge for the homeless, whom he called “nobles of the street.”

A smiling young man, dressed in black, poses for a photo.
The Argentinian Jorge Mario Bergoglio, ordained for the Jesuits in 1969 at the Theological Faculty of San Miguel.
Jesuit General Curia via Getty Images

He washed the feet of migrants and prisoners during the traditional foot-washing ceremony on the Thursday before Easter. In an unprecedented act for a pope, he also washed the feet of non-Christians.

He encouraged a more welcoming attitude toward gay and lesbian Catholics and invited transgender people to meet with him at the Vatican.

On other contentious issues, Francis reaffirmed official Catholic positions. He labeled homosexual behavior a “sin,” although he also stated that it should not be considered a crime. Francis criticized gender theory for “blurring” differences between men and women.

While he maintained the church’s position that all priests should be male, he made far-reaching changes that opened various leadership roles to women. Francis was the first pope to appoint a woman to head an administrative office at the Vatican. Also for the first time, women were included in the 70-member body that selects bishops and the 15-member council that oversees Vatican finances. Shortly before his death, he appointed an Italian nun, Sister Raffaella Petrini, as President of the Vatican City.

Pope Francis holding on to a railing as he greets people.
Pope Francis in St. Peter’s Square on April 18, 2022.
Stefano Spaziani/Mondadori Portfolio via Getty Images

Not shy of controversy

Some of Francis’ positions led to opposition in some Catholic circles.

One such issue was related to Francis’ embrace of religious diversity. Delivering an address at the Seventh Congress of Leaders of World and Traditional Religions in Kazakhstan in 2022, he said that members of the world’s different religions were “children of the same heaven.”

While in Morocco, he spoke out against conversion as a mission, saying to the Catholic community that they should live “in brotherhood with other faiths.” To some of his critics, however, such statements undermined the unique truth of Christianity.

During his tenure, the pope called for “synodality,” a more democratic approach to decision making. For example, synod meetings in November 2023 included laypeople and women as voting members. But the synod was resisted by some bishops who feared it would lessen the importance of priests as teachers and leaders.

In a significant move that will influence the choosing of his successor, Pope Francis appointed more cardinals from the Global South. But not all Catholic leaders in the Global South followed his lead on doctrine. For example, African bishops publicly criticized Pope Francis’ December 2023 ruling that allowed blessings of individuals in same sex couples.

His most controversial move was limiting the celebration of the Mass in the older form that uses Latin. This reversed a decision made by Benedict XVI that allowed the Latin Mass to be more widely practiced.

Traditionalists argued that the Latin Mass was an important – and beautiful – part of the Catholic tradition. But Francis believed that it had divided Catholics into separate groups who worshiped differently.

This concern for Catholic unity also led him to discipline two American critics of his reforms, Bishop Joseph Strickland of Tyler, Texas, and Cardinal Raymond Burke. Most significantly, Carlo Maria Viganò, the former Vatican ambassador, or nuncio, to the United States was excommunicated during Francis’ tenure for promoting “schism.”

Recently, Pope Francis also criticized the Trump administration’s efforts to deport migrants. In a letter to US Bishops, he recalled that Jesus, Mary and Joseph had been emigrants and refugees in Egypt. Pope Francis also argued that migrants who enter a country illegally should not be treated as criminals because they are in need and have dignity as human beings.

Writings on ‘the common good’

In his official papal letters, called encyclicals, Francis echoed his public actions by emphasizing the “common good,” or the rights and responsibilities necessary for human flourishing.

Several people seated in a row watch as the pope washes the feet of one of them.
Pope Francis washes the foot of a man during the foot-washing ritual at a refugee center outside of Rome on March 24, 2016.
L’Osservatore Romano/Pool Photo via AP

His first encyclical in 2013, Lumen Fidei, or “The Light of Faith,” sets out to show how faith can unite people everywhere.

In his next encyclical, Laudato Si’, or “Praise Be to You,” Francis addressed the environmental crisis, including pollution and climate change. He also called attention to unequal distribution of wealth and called for an “integral ecology” that respects both human beings and the environment.

His third encyclical in 2020, Fratelli Tutti, or “Brothers All,” criticized a “throwaway culture” that discards human beings, especially the poor, the unborn and the elderly. In a significant act for the head of the Catholic Church, Francis concluded by speaking of non-Catholics who have inspired him: Martin Luther King Jr., Desmond Tutu and Mahatma Gandhi.

In his last encyclical, Dilexit Nos, or “He Loved Us,” he reflected on God’s Love through meditating on the symbol of the Sacred Heart that depicts flames of love coming from Jesus’ wounded heart that was pierced during the crucifixion.

Francis also proclaimed a special “year of mercy” in 2015-16. The pope consistently argued for a culture of mercy that reflects the love of Jesus Christ, calling him “the face of God’s mercy.”

A historic papacy

Francis’ papacy has been historic. He embraced the marginalized in ways that no pope had done before. He not only deepened the Catholic Church’s commitment to the poor in its religious life but also expanded who is included in its decision making.

The pope did have his critics who thought he went too far, too fast. And whether his reforms take root depends on his successor. Among many things, Francis will be remembered for how his pontificate represented a shift in power in the Catholic Church away from Western Europe to the Global South, where the majority of Catholics now live.The Conversation

Mathew Schmalz, Professor of Religious Studies, College of the Holy Cross

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The murder rate in Venezuela has fallen − but both Trump and Maduro are wrong about why

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theconversation.com – Rebecca Hanson, Assistant Professor of Latin American Studies, Sociology and Criminology, University of Florida – 2025-02-24 07:41:00

The murder rate in Venezuela has fallen − but both Trump and Maduro are wrong about why

Members of government-backed militias take part in a march in Caracas, Venezuela, on Jan. 7, 2025.
AP Photo/Matias Delacroix

Rebecca Hanson, University of Florida

The body of former Venezuelan army officer Ronald Ojeda was found on Feb. 19, 2024, in a suitcase buried under 5 feet of concrete. Ojeda, accused by Venezuela of plotting against the government, had gone missing nine days earlier, when men dressed as police broke into his apartment in the Chilean capital of Santiago and dragged him away.

Following a yearlong investigation, authorities in Chile have now pointed the finger at the Venezuelan gang Tren de Aragua, claiming members carried out the assassination at the behest of that country’s president, Nicolás Maduro.

It comes as the relationship between Maduro’s government and criminal gangs is under increased scrutiny, both among regional governments in Latin America and in the United States.

Conservative media outlets in the U.S. and right-leaning groups such as the Heritage Foundation have accused Maduro of sending gang members into the U.S. to destabilize the country.

President Donald Trump has even suggested that Maduro successfully reduced crime by exporting gang members to the U.S. “Crime is down in Venezuela by 67% because they’re taking their gangs and their criminals and depositing them very nicely into the United States,” he told supporters in April 2024.

According to data from the Venezuelan Ministry of Health, shared with me by scholar of Venezuelan politics Dorothy Kronick, homicide rates have indeed come down in recent years. And this trend is confirmed by the Venezuelan Observatory of Violence.

The fall in homicide rates has coincided with Maduro successfully consolidating his authoritarian rule in Venezuela. And explanations of the drop in crime tend to imply that it is the result of the government co-opting and controlling gangs. Some observers have even referred to Venezuela as a “narcostate,” suggesting that drug trafficking in the country is an organized venture between top officials and criminal groups.

I have studied crime, violence and policing in Venezuela since 2011 and know that this narrative is at best oversimplistic, at worst outright mistruth. As I explore in my new book, “Policing the Revolution: The Transformation of Coercive Power and Venezuela’s Security Landscape During Chavismo,” the case of Venezuela is not one of government control over criminal groups. Rather, it is characterized by an unstable and volatile relationship between the government and multiple competing armed actors, including gangs and the police.

Violent, but becoming less so

Falling homicide rates should not mask the fact that Venezuela is still plagued by violence. Since the mid-2000s it has been ranked as one of the most violent countries in the world.

Former President Hugo Chávez was never able to get a handle on crime, particularly violent crime, which increased exponentially under his government. The trend continued during Maduro’s first years in office after Chávez’s death in 2013.

However, all available evidence suggests that Venezuela’s homicide rate has declined since reaching a peak in 2016 – by around 42%.

But there’s no evidence this is because the government is “offshoring” criminals.

Maduro’s own explanation for this decline portrays the government as handily controlling criminals by means of incredibly lethal police raids carried out between 2015 and 2019. In short, Maduro claims that the police have effectively “wiped out” criminal groups.

Competing police forces …

But rather than “wiping out” criminal organizations, the Maduro government has instead maintained volatile relationships with many armed groups, including gangs, nonstate paramilitary groups and even the country’s own police forces.

These relationships have produced significant conflict and dysfunction within state institutions. This is clear when looking at institutions presumed to be synonymous with state control, such as the police.

Chávez’s and Maduro’s governments put more police and soldiers in the streets. They created security institutions, such as the Policía Nacional Bolivariana, or Bolivarian National Police.

However, rapid growth of the security apparatus, amid competing approaches, has generated more conflict than coordination.

Police officers and police reformers I interviewed referred to state security policies and the changes they produced as akin to Frankenstein’s monster – an aberration rapidly outpacing the creator’s ability to control it.

What they mean is the government had created new security institutions so quickly that it is unable to supervise and control them. As one former police officer and Chavista politician told me: “Our challenge now is how to manage the monster we created.”

People in army fatigues and holding guns stand in front of a building.
Members of the National Guard take part in an anti-gang security operation in Caracas on July 13, 2015.
Federico Parra/AFP via Getty Images

State policies have also generated significant distrust between the police and the government, and among different police forces.

This distrust has even resulted in police forces coming to blows with each other in the streets on multiple occasions. On Feb. 19, 2020, a section of the Prados del Este highway in Caracas was shut down as officers from Venezuela’s National Police and the country’s investigative police brandished weapons, shoving, punching and wrestling each other to the ground.

… cooperating gangs

It is, as such, highly unlikely that falling homicide rates are the result of policing. Indeed, I interviewed over 200 police officers while conducting research for my book, and most believed that the government’s policing initiatives contributed to crime and violence rather than reducing it.

A more plausible explanation for falling homicide figures is that Maduro’s policies have resulted in more consolidated relationships between criminal groups themselves.

Maduro’s government has built relationships with gangs, but this doesn’t necessarily imply control over them. Since 2013 the government has negotiated pacts with some of the country’s largest gangs, including a gang confederation led by the infamous El Koki in Caracas and the Belén gang in the state of Miranda.

The government agreed to tolerate illicit activities within certain areas and prohibit police from entering gang territory. In exchange, gangs agreed to reduce killings and other highly visible crimes such as kidnapping. As my book and previous research with Verónica Zubillaga, Francisco Sánchez and Leonard Gómez shows, these pacts allowed gangs to consolidate control over territory and illicit markets.

Gangs also negotiated agreements among themselves in case the government pacts fell through. For example, they agreed to divide territory and markets to avoid future conflict and share resources such as weapons and ammunition. This produced less conflict between gangs and less disruption in illicit markets, resulting in fewer homicides.

When pacts have ruptured in the past, the spectacularly violent confrontations that ensued between gangs and the police have shown gangs’ capacity to resist government intervention. Still, the overall effect of pacts and gang consolidation has been a reduction in homicides.

As one neighbor living in gang territory put it: “Before, gangs confronted each other; they killed each other. Now they don’t. Now they are growing.”

‘Mother of all infuriations’

Relationships between the government and various nonstate armed groups, including gangs, have generated enormous discontent within police forces.

As one police officer explained in an interview, these pacts represented the “mother of all infuriations.” For many officers, the goverment’s pacts with other armed groups is tantamount to its sponsorship of criminal activities.

And this discontent has produced sporadic violent confrontations. Even when government-gang pacts are in place, the government has been unable to keep police forces from entering gang territory and engaging in deadly shootouts.

Certainly from the outside, it may look like Maduro’s government has co-opted gangs for political purposes. And with the U.S. government adding Tren de Aragua to its list of global terrorist groups, that could put Venezuela in danger of being labeled a “state sponsor of terrorism.”

However, the Ojeda case in Chile should not be taken as evidence that stable and strong ties exist between Maduro’s government and criminal groups – at least not yet.

Instead, authoritarian survival in Venezuela for now seems to depend on volatile relationships between multiple and competing armed groups that collaborate temporarily with the government when their diverse interests overlap.The Conversation

Rebecca Hanson, Assistant Professor of Latin American Studies, Sociology and Criminology, University of Florida

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How Roman society integrated people who altered their bodies and defied gender norms

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theconversation.com – Tom Sapsford, Assistant professor of Classical Studies, Boston College – 2025-02-24 07:36:00

How Roman society integrated people who altered their bodies and defied gender norms

A relief showing a gallus making sacrifices to the goddess Cybele and Attis.
Sailko via Wikimedia Commons, CC BY

Tom Sapsford, Boston College

A few weeks into his second term, President Donald Trump signed two executive orders restricting the rights of trans workers in the federal government. The first was a renewal of the ban on transgender people joining the U.S. military – initially signed in 2017 and later repealed by President Joe Biden in 2021. The second was a more sweeping memo that recognizes only two sexes in federal records and policies.

In the ancient Roman world, which I study, biological sex and gender expression did not always line up as neatly as the president is demanding to see in today’s government.

In antiquity, there were masculine women, feminine men and people who altered their bodies to match their gender expression more closely. In particular, two figures – the cinaedus and the gallus – provide examples of men whose effeminate behavior and modified anatomies were striking yet still integrated into Roman society.

The cinaedus and the commander in chief

In ancient Rome, some men who did not fit neatly within gender categories were called “cinaedi.” They were usually adult males singled out for their extreme effeminacy and nonnormative sexual desires.

The cinaedus was already a recognizable figure in ancient Greece and was first mentioned in the fourth century B.C. by Plato. He says little more than that a cinaedus’ life was terrible, base and miserable. Later Roman authors provide more detail.

Martial, a Roman poet writing in the first century A.D., for instance, describes a cinaedus’ dysfunctional penis as like a “soggy leather strap” in one epigram. In the same century, the Roman novelist Petronius has a cinaedus suggest that both he and his fellows have had their genitals removed.

In a fable by Phaedrus, also written in the first century A.D., a barbarian is threatening the troops of the military leader, Pompey the Great. All are afraid to challenge this fierce opponent until a “cinaedus” volunteers to fight.

The cinaedus is described as a soldier of great size but with a cracked voice and mincing walk. After pleading permission in a stereotypically lisping manner from Pompey the Great, his commander in chief, the cinaedus steps into battle. He quickly severs the barbarian’s head and, with army agog, is summarily rewarded by Pompey.

In Phaedrus’ fable, the cinaedus is untrustworthy. He is described as having stolen valuables from Pompey early on in the tale and then later swears on oath that he hasn’t.

Yet the moral of Phaedrus’ fable of the soldier-cinaedus is that such deceptive appearances and actions might actually be strategically successful in military matters. The cinaedus has an edge over Pompey’s other soldiers precisely due to his disarming effeminacy. In the tale, this doesn’t at all diminish his skills as a lethal fighter. Rather, the cinaedus’ effeminacy combined with his martial valor ultimately lead to the barbarian’s defeat.

Trans priests and the safety of the Roman state

The galli, another group that lived in the heart of the city of Rome, also blurred gender roles. They were males who had castrated their genitalia in dedication to the Great Mother goddess Cybele, who was their protector.

As reported by several ancient sources, including Cicero and Livy, in 204 B.C. the Roman state consulted a set of prophetic scrolls called the Sibylline Oracles on how best to respond to the pressures it faced as a result of the Second Punic War – Rome’s prolonged conflict with Carthage and its fierce military general, Hannibal.

The oracles’ answer – and Rome’s subsequent action – was to import a strange and foreign religious order from Asia Minor into the heart of Rome, where it would remain for the next several hundred years.

The temple of Cybele was located on the Palatine Hill, next to several important shrines, monuments and later even the residence of the Emperor Augustus. As the poet Ovid tells us, each year during Cybele’s festival the galli would proceed through the streets of Rome carrying a statue of the goddess, while ululating wildly in time with the sound of wailing pipes, banging drums and crashing cymbals.

More so than the figure of the cinaedus, ancient literary sources present the galli’s gender difference similarly to modern-day trans women, often using feminine pronouns when describing them.

For instance, the poet Catullus details the origin story of the galli’s founder figure, Attis, who was Cybele’s mythical consort and chief priest. Notably, Catullus switches from using masculine adjectives to feminine ones at the very moment of Attis’ self-castration.

YouTube video
Attis.

Similarly, in his novel, “The Golden Ass,” the second century A.D. writer Apuleius has one gallus address his fellow devotees as “girls.”

While several ancient sources mock these figures for their gender-nonconforming appearance and behaviors, it is nevertheless evident that the galli held a sacred place within the Roman state. They were viewed as being important to Rome’s continued safety and prominence.

For example, Plutarch in his “Life of Marius” relates that a priest of the Great Mother came to Rome in 103 B.C. to convey an oracle that the Romans would be triumphant in war. Though believed by the Senate, this priest, Bataces, was mocked mercilessly in the plebian assembly. However, when the individual who had insulted Bataces swiftly died of a terrible fever, the plebians too gave this oracle and the goddess’s prophetic powers their backing.

Today’s trans issues

Behind Trump’s executive orders are two assertions: first, that transgender identity is a form of ideology: a modern invention created to justify deviance from one’s sex as assigned at birth; second, that transgender identity is both a form of disease and of dishonesty.

The reissued military ban doubles down on the perceived dishonesty of trans folk, contrasting it with the ideals and principles needed for combat. The order states that the “adoption of a gender identity inconsistent with an individual’s sex conflicts with a soldier’s commitment to an honorable, truthful, and disciplined lifestyle.”

Taking a long view of gender diversity across millennia has shown me that many individuals in antiquity certainly lived lives outside of the clear-cut formula that the Trump administration has stated, namely that “women are biologically female and men are biologically male.”

Gender diversity is not simply a late 20th- or early 21st-century phenomenon. However, the fear that gender-diverse people are diseased and devious likewise arises in several ancient sources. In the classical world, these fears seem limited to the realms of satire and fantasy; in our current time, we are seeing these fears being harnessed for government policy.

This article incorporates material from a story originally published on Aug. 1, 2017.The Conversation

Tom Sapsford, Assistant professor of Classical Studies, Boston College

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