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

Macron meets Machado, stresses need for democratic transition in Venezuela

Emmanuel Macron met on Monday at the Élysée Palace with Venezuelan opposition leader María Corina Machado, where they discussed the importance of advancing a democratic transition in Venezuela.

In a message shared on social media, Macron highlighted Machado’s commitment to freedom and stressed the need to achieve a transition that is peaceful and respects the will of the Venezuelan people.

“I received María Corina Machado, Nobel Peace Prize laureate. Together, we discussed her commitment to freedom and the importance of achieving a democratic, peaceful transition in Venezuela that respects the will of its people,” he wrote.

For her part, Machado expressed her “deep gratitude” to Macron and to France for their support of democracy and freedom in Venezuela.

“We have gone through a long and painful journey, and we are now very close to freedom. Venezuela will become a nation of free and equal men and women—prosperous, safe, and united,” she said.

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International

Trump says Iran seeks new talks after failed negotiations in Pakistan

Donald Trump said on Monday that Iran has reached out to United States to resume negotiations, following the collapse of recent talks held in Islamabad.

“We’ve been contacted by the other side,” Trump told reporters, adding that Iran is eager to reach a deal “at all costs.” Speaking from the Oval Office, he reiterated that his main objective is to prevent the Islamic Republic from acquiring nuclear weapons and warned that he will not allow Iran to “blackmail” the international community.

After negotiations between Washington and Tehran ended without agreement on Sunday, Trump announced that the U.S. would move to block the Strait of Hormuz, a critical route for global oil trade.

The waterway had already been disrupted by Iran in response to a U.S. and Israeli offensive launched on February 28, causing significant shocks to the global economy.

In a post on Truth Social, Trump further warned that any Iranian vessel attempting to bypass the U.S. naval blockade in the strait would be “eliminated immediately.”

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The renewed tensions have pushed oil prices higher, while global stock markets have reacted negatively to the lack of an agreement in Islamabad.

International

Trump orders U.S. control of Strait of Hormuz after failed Iran talks

U.S. President Donald Trump announced on Sunday that the United States will take control of the Strait of Hormuz“effective immediately,” following the collapse of negotiations with Iran held in Islamabad.

In a post on Truth Social, Trump said he had ordered the U.S. Navy to block vessels attempting to enter or exit the strategic waterway, a key route for global energy trade.

“The meeting went well, agreement was reached on most points, but the only really important one — nuclear weapons — was not approved,” Trump said, referring to the talks with Iranian representatives.

The president also stated that he had instructed authorities to intercept ships in international waters that had paid tolls to Iran to transit the strait, calling such payments “illegal.” He further accused Tehran of hindering an agreement by deploying mines in the area, describing the move as “international extortion.”

Trump added that the United States will undertake efforts to clear mines from the strait and expressed confidence that a future agreement ensuring free navigation could eventually be reached.

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The announcement came after Vice President JD Vance and special envoys Steve Witkoff and Jared Kushner briefed the president on the outcome of the negotiations, considered the highest-level contacts between the two countries since the 1979 Islamic Revolution.

While Trump acknowledged that enough progress had been made to maintain a temporary truce, he criticized Iran for remaining unwilling to abandon its nuclear ambitions, calling its position “very inflexible” on the central issue.