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Oldest human relative walked upright 7 mn years ago: study

AFP

The earliest known human ancestor walked on two feet as well as climbing through trees around seven million years ago, scientists said Wednesday after studying three limb bones.

When the skull of Sahelanthropus tchadensis was discovered in Chad in 2001, it pushed back the age of the oldest known representative species of humanity by a million years. 

Nicknamed “Toumai”, the nearly complete cranium was thought to indicate that the species walked on two feet because of the position of its vertebral column and other factors.

However the subject triggered fierce debate among scientists, partly due to the scarcity and quality of the available bones, with some even claiming that Toumai was not a human relative but just an ancient ape.

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In a study published in the Nature journal on Wednesday, a team of researchers exhaustively analysed a thigh bone and two forearm bones found at the same site as the Toumai skull.

“The skull tells us that Sahelanthropus is part of the human lineage,” said paleoanthropologist Franck Guy, one of the authors of the study.

The new research on the limb bones demonstrates that walking on two feet was its “preferred mode of getting around, depending on the situation,” he told a press conference. 

But they also sometimes moved through the trees, he added. 

– ‘Not a magical trait’ –

The leg and arm bones were found alongside thousands of other fossils in 2001, and the researchers were not able to confirm that they belonged to the same individual as the Toumai skull.

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After years of testing and measuring the bones, they identified 23 characteristics which were then compared to fossils from great apes as well as hominins — which are species more closely related to humans than chimpanzees.

They concluded that “these characteristics are much closer to what would be seen in a hominin than any other primate,” the study’s lead author Guillaume Daver told the press conference.

For example, the forearm bones did not show evidence that the Sahelanthropus leaned on the back of its hands, as is done by gorillas and chimpanzees.

The Sahelanthropus lived in an area with a combination of forests, palm groves and tropical savannahs, meaning that being able to both walk and climb through trees would have been an advantage.

There have been previous suggestions that it was the ability to walk on two feet that drove humans to evolve separately from chimpanzees, putting us on the path to where we are today.

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However the researchers emphasised that what made Sahelanthropus human was its ability to adapt to its environment.

“Bipedalism (walking on two legs) is not a magical trait that strictly defines humanity,” paleontologist Jean-Renaud Boisserie told the press conference.

“It is a characteristic that we find at the present time in all the representatives of humanity.”

– Our ‘bushy’ family tree –

Paleoanthropologist Antoine Balzeau of France’s National Museum of Natural History said the “extremely substantial” study gives “a more complete image of Toumai and therefore of the first humans”.

It also bolstered the theory that the human family tree is “bushy”, and was not like the “simplistic image of humans who follow one another, with abilities that improve over time,” Balzeau, who was not involved in the research, told AFP.

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Daniel Lieberman, a professor of human evolutionary biology at Harvard University, said in a linked paper in Nature that the study’s “authors have squeezed as much information as possible from the fossil data”.

But he added that the research will not offer “full resolution” of the debate.

Milford Wolpoff, a paleoanthropologist at the US University of Michigan cast doubt on whether Toumai is a hominin, telling AFP that “extraordinary claims require extraordinary evidence”.

Wednesday’s study was carried out by researchers from the PALEVOPRIM paleontology institute, a collaboration between France’s CNRS research centre and Poitiers University, as well as scientists in Chad.

Guy said the team hopes to continue its research in Chad next year — “security permitting”.

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Chadian paleontologist Clarisse Nekoulnang said the team was “trying to find sites older than that of Toumai”.

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International

20th Festival Salvadoreñísimo brings together thousands of salvadorans in Houston

Parades, baton twirlers, and a mix of Salvadoran and international music set the tone for the 20th edition of the Festival Salvadoreñísimo, held in Houston, Texas, with Tony Villatoro once again leading the organization.

This year, the highly anticipated event moved to a new venue: The Crown Festival Park in Sugar Land, Fort Bend County, within the “space city.” Despite the scorching sun of the open-air setting, spirits remained high, and a brief drizzle later brought relief and renewed energy to the celebration.

More than 5,000 Salvadorans gathered at the park, joining with Guatemalans, Hondurans, and even Mexicans to commemorate 204 years of independence for El Salvador and Central America. The festival was marked by a family-friendly atmosphere, where traditional foods such as pupusas, panes con gallina, pastelitos, and horchata could not be missed.

“Twenty years with this festival, and I am very grateful to the Salvadoran community that always shows up. Thanks to them, the sponsors, and to Diario El Salvador for supporting us since the beginning,” said Tony Villatoro, as more compatriots continued arriving to the celebration.

“I am satisfied. I didn’t expect this level of attendance, especially since we were trying a new outdoor venue with some challenges, but we made it through successfully,” Villatoro added.

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The Festival Salvadoreñísimo, now a two-decade-long tradition, once again took place as part of Hispanic Heritage Month, a time when independence festivities run from mid-September through October.

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International

El Salvador unveils 2025-2029 National Reintegration Plan for returned migrants

The Ministry of Foreign Affairs has launched the National Reintegration Plan for Returned Salvadorans 2025-2029, a strategy designed to create greater opportunities, ensure access to quality services, and provide a favorable environment for Salvadorans returning to their home country to rebuild their lives.

The initiative is supported by the United Nations Network on Migration, coordinated by the International Organization for Migration (IOM), financed by the Peacebuilding Fund (PBF), and backed by the Inter-American Development Bank’s (IDB) Migration Unit.

During the presentation, Vice Minister of Diaspora and Human Mobility Cindy Mariella Portal emphasized that migrants often face multiple challenges upon returning to their communities.

“That is why we are implementing actions that generate real and sustainable opportunities for these individuals,” she stated.

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International

Authorities capture CJNG financial chief in international airport operation

A man identified as the main financial operator of the powerful Jalisco New Generation Cartel (CJNG) was arrested Thursday at Mexico City’s international airport, authorities reported.

The individual, named by Mexican media as Óscar Antonio Álvarez, was apprehended during an operation involving the army, navy, National Guard, police, and the attorney general’s office, according to a joint statement.

Álvarez is considered the primary financial operator of a criminal group originating in Jalisco, and the capture took place at Benito Juárez Airport as he arrived on a flight from Barcelona, Spain.

Authorities stated that Álvarez faces charges of organized crime and money laundering, specifically for receiving and transferring illicit funds. His work with the CJNG reportedly included purchasing properties and managing businesses in the tequila and livestock sectors.

According to El Universal, Álvarez was directly under the command of Rubén Oseguera Cervantes, “El Mencho”, the cartel’s top leader, for whom the U.S. offers a $15 million reward.

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The CJNG, which operates throughout Mexico and in various parts of the world, was designated earlier this year as a “foreign terrorist organization” by the U.S. government.

Álvarez was handed over to the federal public prosecutor to determine his legal situation, the report added.

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