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”.

Central America

U.S. extradites Iranian man over alleged sanctions evasion scheme

The United States has extradited from Panama an Iranian national accused of evading economic sanctions against Iran by illegally exporting U.S. technology. He is scheduled to appear this Monday before a court in Seattle.

Reza Dindar, 44, was extradited on April 17 after being detained in Panama since July 2025 on charges related to export control violations between 2011 and 2012, allegedly carried out through companies based in China.

The defendant appeared before a U.S. district court in Seattle, where he faces charges of violating sanctions imposed by the United States on Iran in 1995 during the administration of Bill Clinton. These sanctions prohibit the unauthorized export, re-export, or supply—directly or indirectly—of U.S. goods, technology, or services to Iran or its government.

According to the indictment, between 2010 and 2014, Dindar led the company New Port Sourcing Solutions in Xi’an, China, which allegedly concealed the procurement of U.S. products for shipment to clients in Iran.

International

Elon Musk skips French court appearance over X investigation

Billionaire Elon Musk did not appear this Monday before French authorities, who had summoned him for a voluntary statement as part of an investigation into his social media platform X, prosecutors told AFP.

The platform has been under investigation since early 2025 following complaints from lawmakers alleging bias in its algorithms, which may have altered its functioning and interfered in politics in France.

The probe has since expanded to include other alleged offenses, such as complicity in the distribution of child sexual abuse material, as well as the role of Grok in spreading denialist content and sexually explicit fake images.

In early February, investigators raided X’s offices in Paris. The company has denied any wrongdoing, describing the searches as “political” and “abusive.”

At that time, the Paris prosecutor’s office summoned Musk and former CEO Linda Yaccarino to provide voluntary testimony as those responsible for the platform during the period under investigation.

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Paris prosecutor Laure Beccuau also stated that X employees were called to testify as witnesses between April 20 and April 24.

International

Four injured in shooting at Teotihuacán archaeological site in Mexico

Four more people were injured by gunfire during the ആക്രമ attack at Teotihuacán, one of the most emblematic archaeological complexes in Mexico, authorities confirmed.

The Secretary of Security of the State of Mexico, Cristóbal Castañeda, reported that the victims include two Colombian nationals, one Russian, and one Canadian. Additionally, two other individuals were injured due to falls, according to a statement from local authorities.

President Claudia Sheinbaum expressed concern over the incident, stating on social media that “what happened today in Teotihuacán deeply pains us.”

Federal authorities recovered a firearm, a knife, and ammunition at the scene, which remains under the protection of state police and the Guardia Nacional, according to the federal Security Cabinet.

Located about 50 kilometers from Mexico City, Teotihuacán is a major tourist destination frequently visited by both domestic and international travelers.