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 floats Vance-Rubio potential Republican ticket for 2028 election
U.S. President Donald Trump suggested on Monday that Vice President JD Vance and Secretary of State Marco Rubiocould potentially form a Republican presidential ticket for the 2028 elections.
Speaking during a dinner with law enforcement officials as part of National Police Week, Trump publicly praised both officials and said they could make “an ideal team” for the next presidential race.
“Who likes JD Vance? Who likes Marco Rubio?” Trump asked attendees before adding that the pair “sound like a good combination.”
The president highlighted his vice president’s performance in office, stating that their current partnership has been highly effective. “JD is perfect, that has been a perfect formula,” Trump told reporters later.
He further suggested that a Vance-Rubio pairing could represent a strong presidential and vice-presidential ticket, although he stopped short of offering any formal endorsement.
“I think it sounds like a presidential candidate and a vice-presidential candidate,” he said, while clarifying that his remarks should not be interpreted as an official backing of any future campaign.
So far, neither Vance nor Rubio has publicly confirmed any intention to run in the 2028 presidential election.
Rubio previously sought the Republican nomination in 2016 but withdrew after losing the primary race to Trump. Later, in a December 2025 interview with Vanity Fair, he said he would be among the first to support Vance if he decided to run for the White House.
Vance, meanwhile, has recently dismissed speculation of any political rivalry with Rubio amid growing discussion about potential future GOP leadership.
International
Russia Accuses Ukraine of Violating Victory Day Truce
Russia accused Ukraine on Saturday of violating a Victory Day truce that was reportedly agreed with mediation from the United States, claiming that Ukrainian forces carried out attacks on Russian territory as well as on the annexed Crimean peninsula.
Despite the declared ceasefire, the Russian Ministry of Defense said in a statement that Ukrainian forces attacked Russian military positions using attack drones and artillery.
According to the ministry, Ukrainian forces made twelve attempts to advance toward Russian-held positions across several sectors of the front line.
It also alleged that Ukrainian strikes targeted civilian infrastructure in Crimea, several border regions, the Caucasus, and other areas including Moscow and Perm in the Ural region.
The Defense Ministry estimated around 8,900 violations of the ceasefire in total, including more than 7,000 drone attacks and over 1,000 strikes involving tanks, artillery, multiple rocket launch systems, and mortars since the truce came into effect at midnight.
Russia said its forces responded “symmetrically” to what it described as violations by Ukrainian troops.
Earlier, the Kremlin denied claims that Ukraine attempted to sabotage a military parade in Red Square marking the 81st anniversary of the Soviet victory over Nazi Germany in World War II.
“No attempts were made. Everything went well,” Kremlin spokesperson Dmitry Peskov told local media.
International
Trump Says U.S.-Iran Talks Progressing, Signals Possible Deal on Strait of Hormuz
U.S. President Donald Trump said Wednesday that Washington is holding “very good” talks with Iran and stated that there is a strong possibility of reaching an agreement to end the conflict and reopen the Strait of Hormuz.
“We’ve had very good conversations over the last 44 hours, and it’s very possible that we’ll reach an agreement,” Trump said during an event held in the Oval Office at the White House.
The president’s remarks came just hours after he announced a temporary suspension of the military operation aimed at escorting vessels stranded in the Persian Gulf due to Iran’s blockade of the strategic Strait of Hormuz.
Trump explained that the pause in operations is intended to facilitate diplomatic negotiations between both sides and prevent further military escalation in the region.
“We’re in good shape, and right now things are going well. Now we have to achieve what we need to achieve. If we don’t, we’ll have to go much further,” the Republican president warned.
In a post published on his social media platform Truth Social, Trump reiterated that if Iran accepts Washington’s proposed conditions, military operations and the naval blockade affecting the Islamic republic would come to an end.
However, he also issued a new warning to the Iranian government, stating that the United States would respond with attacks “of greater intensity” if Tehran rejects the agreement promoted by the White House.
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