International

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”.

International

Maradona’s daughter accuses medical team of “horrible manipulation” in court

One of the daughters of Diego Maradona testified in court this Tuesday, breaking down in tears as she denounced what she described as “absolute and horrible manipulation” by her father’s medical team, during an emotional hearing in Argentina.

Gianinna Maradona stated that she and her siblings agreed to home hospitalization after doctors presented it as the best option following the neurosurgery Maradona underwent on November 3, 2020.

The football icon died on November 25 of that year, and the ongoing trial seeks to determine whether the conditions of his home care were appropriate.

According to Gianinna, what the family found at the residence where Maradona was recovering did not match what had been promised. She testified that there was no adequate medical equipment, constant monitoring, or even an ambulance available, despite assurances of continuous care.

“The manipulation was absolute and horrible,” she said during the hearing in San Isidro, near Buenos Aires.

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She accused members of the medical team, including neurosurgeon Leopoldo Luque, psychiatrist Agustina Cosachov, and psychologist Carlos Díaz, of misleading the family.

“I trusted these people, and all they did was manipulate us and leave my son without a grandfather,” she added.

Later in her testimony, recalling that six years have passed since her father’s death, she became emotional and said she struggled deeply with grief in the aftermath.

International

Trump extends Iran ceasefire after Pakistan mediation request

The president of the United States, Donald Trump, announced on Tuesday that he will extend the ceasefire with Iran, which was set to expire on Wednesday, following a request from Pakistan.

In a statement shared on Truth Social, Trump said the truce will remain in place until Iran presents a proposal and negotiations are concluded, regardless of the outcome.

“I will extend the ceasefire until their proposal is presented and negotiations are completed, whatever the result,” the U.S. leader stated.

Trump justified the decision by claiming that Iran’s government is “deeply divided” and noting that Pakistani authorities, acting as mediators, requested a pause in military action until Iranian leaders and representatives submit a unified proposal.

International

Venezuelan opposition demands election date and minimum wage increase

A group of opposition members from the Zulia Humana and former political prisoners on Tuesday demanded that authorities set a date for elections in Venezuela and increase the minimum wage, which has been frozen since 2022 and is currently worth just a few cents per month according to the Banco Central de Venezuela.

During a press conference in Maracaibo, Professor Eduardo Labrador stressed the urgency of establishing an electoral timeline. “We demand that a date be set for elections so Venezuelans can have free and transparent voting. It is essential to have that date now,” he said.

Economist Rodrigo Cabezas, who served under the late President Hugo Chávez, also called for an increase in the minimum wage, arguing that it is feasible through economic policy measures, although he did not specify an amount due to limited public data.

Cabezas warned that Venezuela experienced “galloping inflation” between March of last year and March 2026, a stage that precedes hyperinflation—a phenomenon the country has already faced. However, he clarified that Venezuela is not currently in hyperinflation, expressing hope that it will not return.