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.
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.
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.
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.
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”.
Chadian paleontologist Clarisse Nekoulnang said the team was “trying to find sites older than that of Toumai”.
International
Mexico leads global cases of enforced disappearances, UN report finds
Mexico accounts for the highest number of urgent actions related to enforced disappearances worldwide, according to the latest report by the UN Committee on Enforced Disappearances.
The report, released by I(dh)eas, indicates that Mexico has accumulated 819 cases between 2012 and February 2026, representing 38% of the global total.
In the past five months alone, 40 new urgent requests have been recorded — more than one-third of all such actions worldwide during that period.
The report warns that this trend reflects a structural problem, as the urgent action mechanism — originally intended as an exceptional measure — has become routine in Mexico.
Although the Mexican state formally complies with response deadlines, the Committee identified significant shortcomings in the implementation of these measures. These include the lack of comprehensive search plans, delays in key investigative procedures such as video surveillance and phone data analysis, and insufficient inquiries into possible links involving state agents.
The report also highlights inadequate protection for relatives and individuals involved in search efforts, including cases of reprisals.
Among the most serious incidents documented is the disappearance of a father who had denounced alleged involvement of authorities in his son’s case in the state of Guanajuato.
The accumulation of cases could lead to the application of Article 34 of the Convention, which would allow for the launch of an international investigation into systematic enforced disappearances.
Geographically, the state of Chiapas accounts for 30% of the new urgent actions, many of them linked to collective disappearances of migrants.
International
Le pape Léon XIV appelle à relancer le dialogue pour une paix au Moyen-Orient
Le pape Léon XIV s’est entretenu par téléphone ce vendredi avec le président d’Israël, Isaac Herzog, soulignant la « nécessité de rouvrir » les canaux de dialogue afin de parvenir à une « paix juste » au Moyen-Orient.
Selon un communiqué du Vatican, les deux dirigeants ont insisté sur l’importance de relancer tous les mécanismes diplomatiques pour mettre fin au conflit en cours et œuvrer en faveur d’une paix durable dans la région.
Le communiqué précise également que les discussions ont porté sur la protection des populations civiles et sur le respect du droit international et humanitaire.
Cet échange intervient dans le contexte de la Semaine sainte, cinq jours après un incident à Jérusalem, où la police israélienne avait empêché le cardinal Pierbattista Pizzaballa de célébrer la messe du Dimanche des Rameaux au Saint-Sépulcre.
Le lendemain, le secrétaire d’État du Vatican, Pietro Parolin, avait convoqué l’ambassadeur israélien auprès du Saint-Siège, Yaron Sideman, pour exprimer le mécontentement du Vatican face à cet incident qualifié de « regrettable ».
Cette situation avait suscité une vive réaction internationale, poussant le Premier ministre israélien Benjamin Netanyahu à intervenir pour assurer que le cardinal pourrait accéder au lieu saint.
De son côté, Herzog a confirmé l’échange sur son compte X, indiquant que les discussions ont également porté sur des sujets régionaux, notamment la guerre en Iran et la situation au Liban.
Le pape, d’origine américaine, participe actuellement à sa première Semaine sainte depuis son élection et doit présider ce soir le chemin de croix au Vatican.
International
Devotees in Philippines mark Holy Week with extreme rituals despite rising costs
Despite rising fuel prices driven by the conflict in the Middle East, thousands of devotees in Philippines took part this year in one of the country’s most intense Holy Week traditions.
In the city of San Fernando, located in Pampanga province, dozens of bare-chested penitents with covered faces walked barefoot along dusty streets, whipping their backs with bamboo lashes as part of a ritual that can draw up to 12,000 local and foreign visitors.
Journalists from Agence France-Presse reported seeing participants piercing their skin with glass shards attached to small wooden paddles to ensure bleeding during the ceremony — an act believed to atone for sins and seek divine intervention.
“I do this to pray for the healing of my seven-month-old baby, who is suffering from pneumonia,” said a devotee identified as John David at the start of the procession.
The 49-year-old participant explained that the practice runs in his family. “My grandfather started this, then my father, and now it’s my turn. I have witnessed healing miracles over the years through this act of faith,” he said.
Many attendees traveled for hours to witness the climax of the ritual, in which some penitents allow nails, measuring about seven centimeters, to be driven into their hands before being raised on crosses in a reenactment of crucifixion.
Mexico leads global cases of enforced disappearances, UN report finds
Le pape Léon XIV appelle à relancer le dialogue pour une paix au Moyen-Orient
Devotees in Philippines mark Holy Week with extreme rituals despite rising costs
Tec de Monterrey honors one of its students for his contribution to nanotechnology in medicine
Defense Minister commends salvadoran soldier for Central American Cross Country victory
Extension of the state of emergency approved in southern Chile
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