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
Trump replaces Homeland Security Secretary Kristi Noem with Senator Markwayne Mullin
U.S. President Donald Trump announced Thursday the departure of Kristi Noem as Secretary of Homeland Security, one of the key architects of the administration’s policy of deporting undocumented immigrants.
Noem, who has been assigned a new role as a “special envoy” to Latin America, will be replaced starting March 31 by Republican Senator Markwayne Mullin, the president said in a message posted on his social media platform Truth Social.
According to media reports, Trump made the decision after Noem’s recent hearings in Congress, during which she faced tough questions regarding the awarding of a major public contract.
International
Young Woman Will Represent Mexico at 2026 World Cup Opener, Says President Sheinbaum
Mexico’s president, Claudia Sheinbaum, announced Thursday that the young Mexican woman who proves to have the best ball control skills will receive her personal ticket to the opening match of the 2026 FIFA World Cup in Mexico City.
The left-wing leader had previously said she would not attend the tournament’s opening game on June 11 in the Mexican capital and instead planned to give away the ticket number 00001, reserved for her by FIFA.
During her morning press conference, Sheinbaum explained that women between 16 and 25 years old can participate by submitting a video through an official platform.
“What do they have to do? Keep the ball in the air for one minute,” she said, referring to the soccer juggling challenge that will determine the winner.
Among the judges selecting the winner will be Mexican striker Charlyn Corral, the world’s top female scorer who set a ball-control record in 2005, and professional referee Katia Itzel García.
Sheinbaum also revealed that she plans to watch the opening match during a large public gathering with giant screens in the Zócalo, located in the historic center near the presidential palace.
“Very few people will be able to attend the opening. So I will watch it here with the people, and a young woman will represent me and the people of Mexico,” the president said.
Sheinbaum has previously commented on the high cost of World Cup tickets, as well as the difficulty of obtaining them in a metropolitan area with more than 20 million inhabitants.
In the 2026 tournament, jointly hosted by United States, Mexico, and Canada, Mexico will stage 13 matches in Mexico City, Guadalajara, and Monterrey.
The opening match will take place at the legendary Estadio Azteca, which previously hosted World Cup opening ceremonies in 1970 and 1986, occasions when the presidents in attendance were famously booed by the crowd.
International
Claudia Sheinbaum: Operation Against ‘El Mencho’ Was Based on Pending Arrest Warrants
Mexico’s President Claudia Sheinbaum on Wednesday rejected claims that the military operation that resulted in the death of Nemesio Oseguera Cervantes, known as “El Mencho,” leader of the Jalisco New Generation Cartel (CJNG), was carried out under pressure from the United States government.
Sheinbaum explained that the deployment of federal forces was aimed at executing outstanding arrest warrants against Oseguera Cervantes, who was considered one of the most wanted criminals in both Mexico and the United States.
“That was not the objective (to ease pressure from the United States). It is very important, and I want to repeat it. This individual had an arrest warrant, or several,” Sheinbaum said, referring to the operation conducted on February 22.
According to the president, the initial goal was to capture Oseguera Cervantes, but military forces responded after coming under attack during the intervention.
“The operation was to detain him. The problem is that they were attacked — the Secretariat of National Defense — and they responded at that moment,” she said.
The president insisted that the action was not carried out in response to external demands, although she acknowledged intelligence cooperation with the United States.
“It was not done in any way because of pressure from the United States, not at all. Of course, there was intelligence information from the United States that was used specifically,” she concluded.
Trump replaces Homeland Security Secretary Kristi Noem with Senator Markwayne Mullin
Young Woman Will Represent Mexico at 2026 World Cup Opener, Says President Sheinbaum
Claudia Sheinbaum: Operation Against ‘El Mencho’ Was Based on Pending Arrest Warrants
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
-
International4 days agoBrazil’s Supreme Court Rejects Bolsonaro’s Bid for House Arrest
-
International3 days agoSpain’s Prime Minister to Address Nation Amid Trump’s Trade Threats
-
International4 days agoAnti-ICE Billboard Campaign Targets Immigration Spending in 31 U.S. Cities
-
International2 days agoWhite House Says Spain Agrees to Cooperate with U.S. Military After Trump Threatens Trade Embargo
-
International4 days agoTrump Warns of ‘Major Wave’ of Attacks as Iran Conflict Escalates
-
International3 days agoNew York Announces First 2,000 Seats in Universal 2-K Program
-
International2 days ago
Spain Denies Any Agreement to Cooperate with U.S. Military in Iran Operations
-
International4 days agoMexico Calls for Immediate Probe After National Dies in ICE Custody
-
Central America3 days agoGuatemala’s Attorney General Fails in Bid for Top Court Seat Amid Corruption Allegations
-
Central America2 days agoNicaragua Held Responsible for Harassment of Opposition Prosecutor and His Family
-
International3 days agoWarner Bros. Developing First ‘Game of Thrones’ Movie With ‘Andor’ Writer
-
Central America4 days agoPanama Canal Monitoring Trade as Middle East Conflict Disrupts Shipping
-
International4 days agoBolivia Orders Three Investigations Into Deadly Military Plane Crash
-
International2 days agoClaudia Sheinbaum: Operation Against ‘El Mencho’ Was Based on Pending Arrest Warrants
-
International4 hours agoYoung Woman Will Represent Mexico at 2026 World Cup Opener, Says President Sheinbaum
-
International4 hours agoTrump replaces Homeland Security Secretary Kristi Noem with Senator Markwayne Mullin