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

U.S. allows Venezuela to fund Maduro and Cilia Flores’ legal defense

Until now, the U.S. administration had blocked the Venezuelan government from covering the legal fees of Nicolás Maduro and his wife, Cilia Flores, who is also jailed and facing drug trafficking charges, due to international sanctions imposed on Venezuela.

The couple’s legal team had relied on that argument in an attempt to have the indictment dismissed, claiming that preventing a defendant from accessing counsel of their choice violates rights guaranteed under the Sixth Amendment of the U.S. Constitution.

However, the U.S. Treasury Department will now allow “defense attorneys to receive payments from the Government of Venezuela under certain conditions,” New York prosecutor Jay Clayton wrote in a letter dated Friday to Judge Alvin Hellerstein, who is overseeing the case.

According to the letter, the funds must have become available after March 5, 2026, and cannot come from Venezuelan oil sales regulated in the United States.

Since Maduro’s removal from power in early January, former Vice President Delcy Rodríguez has served as Venezuela’s interim leader.

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The United States effectively controls Venezuelan crude exports, with revenues deposited into special accounts supervised by Washington.

Court documents filed on Friday show that the defense acknowledged the sanctions exemption and, for now, withdrew its motion seeking dismissal of the charges.

International

U.S. Sanctions Network Linked to Fentanyl Trafficking Across India, Guatemala and Mexico

The United States Department of State announced sanctions on Thursday against 23 individuals and companies allegedly linked to an international fentanyl production and smuggling network operating in India, Guatemala and Mexico.

According to the State Department, the network supplied precursor chemicals to the Sinaloa Cartel, which the United States has designated as a Foreign Terrorist Organization.

Washington declared fentanyl, a powerful synthetic opioid, a weapon of mass destruction last year due to its role in the ongoing overdose crisis in the United States.

“By targeting the entire supply chain — from chemical suppliers in Asia to logistical intermediaries in Central America and cartel-linked networks in Mexico — the Trump Administration is dismantling networks that destabilize governance across our hemisphere and threaten U.S. security,” the State Department said.

In a separate statement, the Office of Foreign Assets Control detailed sanctions against three Indian chemical and pharmaceutical companies: Sutaria, Agrat and SR Chemicals, along with a sales executive accused of supplying precursor chemicals to contacts in Guatemala and Mexico.

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In Guatemala, authorities sanctioned J and C Import and Central Logística de Servicios, as well as intermediary Jaime Augusto Barrientos.

The OFAC also designated several intermediaries and import companies operating in the Mexican state of Sinaloa.

As part of the investigation, U.S. authorities identified Ramiro Baltazar Félix as a member of Los Mayos, a faction of the Sinaloa Cartel, and Alejandro Reynoso, accused of operating clandestine drug laboratories in Guadalajara.

International

Pope Leo XIV Says Countries Have Border Rights but Migrants Deserve Respect

Pope Leo XIV said Thursday that migrants must be treated with dignity as he addressed the global migration crisis during a press conference aboard the plane returning from his tour of Africa.

The pontiff answered questions from journalists regarding his upcoming trip to Spain, which will include a visit to the Canary Islands, a region heavily affected by migration flows and growing political polarization surrounding the issue.

“Obviously, migration is a very complex issue and affects many countries — not only Spain, not only Europe, but also the United States. It is a global phenomenon,” the pope said.

Pope Leo XIV also questioned the role of developed nations in addressing the crisis.

“My response begins with a question: What is the Global North doing to help the Global South and those countries where young people no longer see a future and dream of going north, even when the North sometimes has no answers to offer?” he asked.

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While acknowledging that “a state has the right to establish rules for its borders,” the pope insisted that the debate must go beyond border control and address the structural causes that force people to leave their home countries.