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

ICE to remain at airports amid DHS shutdown, Homan says

The U.S. “border czar,” Tom Homan, said Sunday that agents from U.S. Immigration and Customs Enforcement (ICE) will remain deployed at airports until operations return to “100% normal,” as the shutdown of the Department of Homeland Security (DHS) continues.

“We will maintain ICE presence until airports feel they are fully back to normal operations,” Homan said during an interview on Face the Nation on CBS.

Homan justified the deployment on security grounds, noting that the measure was ordered by President Donald Trumpamid widespread absenteeism among agents of the Transportation Security Administration, who have gone without pay for over six weeks due to the DHS shutdown.

According to acting TSA administrator Ha Nguyen McNeill, at least 460 TSA agents have resigned during the shutdown, while daily absenteeism has averaged 11%, exceeding 50% at some airports.

Homan warned that if TSA staffing levels do not recover after the shutdown, ICE agents will continue filling the gap. “ICE is there to support our TSA brothers and sisters. We will remain as long as needed to ensure airport security,” he said.

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The DHS shutdown reached 44 days on Sunday, making it the longest government shutdown in U.S. history. The impasse stems from disagreements between Democrats and Republicans over ICE funding.

A recent bipartisan Senate proposal to fund DHS without including ICE failed after being blocked by House Republicans, who insist on full funding for the agency.

Amid the deadlock, Trump signed an executive order directing Homeland Security Secretary Markwayne Mullin to immediately pay TSA agents to address what he called an “emergency situation” and restore order at airports, with payments expected to begin Monday.

International

Oil prices surge again as Middle East tensions persist

Oil prices climbed again on Friday for a second consecutive session, as markets remained concerned about a prolonged conflict in the Middle East with no tangible diplomatic progress.

North Sea Brent crude for May delivery rose 4.22% to close at $112.57 per barrel.

Meanwhile, U.S. West Texas Intermediate (WTI) approached the $100 mark, settling at $99.64, up 5.46%.

The decision by U.S. President Donald Trump to delay by ten days his ultimatum for the reopening of the Strait of Hormuz failed to reassure market participants.

“It means there will be ten additional days of disruptions in the Middle East for crude and refined product flows,” said Andy Lipow, of Lipow Oil Associates.

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“For prices to come down, a resolution to the conflict is necessary,” Lipow added. “And even in the event of a ceasefire, it is not certain that Iran would allow oil shipments to pass through the Strait of Hormuz.”

International

Young Spanish Woman Receives Euthanasia After Legal Battle, Sparking Debate

A 25-year-old Spanish woman, Noelia Castillo, received euthanasia on Thursday following a prolonged legal dispute with her father.

She passed away at a care center in Sant Pere de Ribes, about 40 kilometers from Barcelona, where she had been living for some time, according to Spanish media reports.

In an interview broadcast a day earlier on Antena 3, Castillo expressed her exhaustion after enduring prolonged suffering. She indicated that her decision was influenced by a combination of personal circumstances and health-related challenges, including family conflicts and a condition of paraplegia following a previous incident that left her with lasting physical consequences.

Spain legalized euthanasia in 2021, becoming one of the few countries that allow patients under strict conditions to seek medical assistance to end their lives in order to avoid what the law defines as unbearable suffering.

The case has reignited debate in Spain over the ethical, legal, and family dimensions surrounding euthanasia, as well as the broader issue of support for individuals in vulnerable situations.