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

Florida judge sets 2027 trial in Trump’s $10 billion lawsuit against BBC

A federal judge in Florida has scheduled February 2027 for the trial in the lawsuit filed by U.S. President Donald Trump against the BBC, in which he is seeking $10 billion in damages for defamation.

Trump accuses the British broadcaster of airing a misleading edit of a speech he delivered on January 6, 2021, which, he says, made it appear that he explicitly urged his supporters to attack the U.S. Capitol in Washington.

The president filed the suit in December in federal court in Florida, alleging defamation and violations of a law governing business practices when the program was broadcast ahead of the 2024 election.

Trump is seeking $5 billion in damages for each of the two claims.

Lawyers for the BBC unsuccessfully asked the court to dismiss the case, arguing that Trump had not suffered a “legally recognizable harm,” since the investigative program Panorama, which included the edited footage, aired outside the United States.

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International

Head-of-state diplomacy key to guiding China–U.S. ties, Beijing says

Head-of-state diplomacy plays an irreplaceable strategic guiding role in China–United States relations, Chinese Foreign Ministry spokesperson Lin Jian said on Thursday during a regular press briefing, when asked about high-level exchanges between the two sides.

Lin added that in a recent phone call, U.S. President Donald Trump once again expressed his intention to visit China in April, while Chinese President Xi Jinping reiterated his invitation.

Both sides remain in communication regarding the matter, the spokesperson said.

Lin noted that the essence of China–U.S. economic and trade ties lies in mutual benefit and win-win outcomes.

“Both parties should work together to implement the important consensus reached by the two heads of state, injecting greater certainty and stability into China–U.S. economic and trade cooperation, as well as into the global economy,” he said.

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International

Trump administration to end special immigration operation in Minnesota

The administration of Donald Trump is bringing to a close its special operation targeting illegal immigration in the northern state of Minnesota, border czar Tom Homan announced Thursday, following weeks of unrest and the fatal shootings of two activists by federal agents.

Thousands of federal officers had been deployed to Minnesota in December to carry out large-scale raids against undocumented immigrants.

The operations triggered strong reactions from residents and advocacy groups, leading to daily confrontations and the deaths of two people who were shot by federal agents.

“I proposed, and President Trump agreed, that this special operation should end in Minnesota,” Homan said during a press conference in the state capital, Minneapolis.

“A significant drawdown began this week and will continue into next week,” he added.

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Homan indicated that similar enforcement efforts could be launched in other cities.

“Next week we will redeploy the agents currently here back to their home stations or to other parts of the country where they are needed. But we will continue to enforce immigration laws,” he said.