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

Winter Storm Fern Leaves 30 Dead and Over One Million Without Power Across the U.S.

The massive winter storm Fern, bringing polar temperatures, battered large portions of the United States for a third consecutive day on Monday, leaving at least 30 people dead, more than one million households without electricity, and thousands of flights grounded.

In the Great Lakes region, residents awoke to extreme cold, with temperatures dropping below -20°C. Forecasts indicate that conditions are expected to worsen in the coming days as an Arctic air mass moves south, particularly across the northern Great Plains and other central regions, where wind chills could plunge to -45°C, temperatures capable of causing frostbite within minutes.

Across the country, heavy snowfall exceeding 30 centimeters in roughly 20 states triggered widespread power outages. According to PowerOutage.com, nearly 800,000 customers remained without electricity on Monday morning, most of them in the southern United States.

In Tennessee, where ice brought down power lines, approximately 250,000 customers were still without power. Outages also affected more than 150,000 customers in Mississippi and over 100,000 in Louisiana, as utility crews struggled to restore service amid dangerous conditions.

International

Spain approves plan to regularize up to 500,000 migrants in Historic Shift

In November 2024, Spanish Prime Minister Pedro Sánchez announced a reform of the country’s immigration regulations aimed at regularizing 300,000 migrants per year over a three-year period, in an effort to counter population aging in a country where births have fallen by 25.6% since 2014, according to official data.

Going against the trend in much of Europe, Spain’s left-wing government has now approved an exceptional migrant regularization plan that could benefit up to 500,000 people, most of them from Latin America.

The measure will allow the regularization of around “half a million people” who have been living in Spain for at least five months, arrived before December 31, 2025, and have no criminal record, Migration Minister Elma Saiz explained on public television.

The plan, approved on Tuesday by the Council of Ministers, establishes that applications will be processed between April and June 30, enabling beneficiaries to work in any sector and anywhere in the country, Saiz said.

“Today is a historic day for our country. We are strengthening a migration model based on human rights, integration, and one that is compatible with economic growth and social cohesion,” the minister later stated at a press conference.

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The socialist government of Pedro Sánchez stands out within the European Union for its migration policy, contrasting with the tightening of immigration measures across much of the bloc amid pressure from far-right movements.

Central America

Honduras swears in conservative president Asfura after disputed election

Conservative politician Nasry Asfura assumed the presidency of Honduras on Tuesday with an agenda closely aligned with the United States, a shift that could strain the country’s relationship with China as he seeks to confront the economic and security challenges facing the poorest and most violent nation in Central America.

Asfura’s rise to power, backed by U.S. President Donald Trump, marks the end of four years of left-wing rule and secures Trump another regional ally amid the advance of conservative governments in Chile, Bolivia, Peru, and Argentina.

The 67-year-old former mayor and construction businessman was sworn in during an austere ceremony at the National Congress, following a tightly contested election marred by opposition allegations of fraud and Trump’s threat to cut U.S. aid if his preferred candidate did not prevail.

Grateful for Washington’s support, Asfura—who is of Palestinian descent—traveled to the United States to meet with Secretary of State Marco Rubio, before visiting Israeli Prime Minister Benjamin Netanyahu.

“We need to strengthen relations with our most important trading partner,” Asfura said after being declared the winner of the November 30 election by a narrow margin, following a tense vote count that lasted just over three weeks.