International
Dinosaur tail found in Chile stuns scientists
AFP
Chilean paleontologists on Wednesday presented their findings on a dinosaur discovered three years ago in Patagonia which they said had a highly unusual tail that has stumped researchers
The remains of the Stegouros elengassen were discovered during excavations in 2018 at Cerro Guido, a site known to harbor numerous fossils, by a team who believed they were dealing with an already known species of dinosaur until they examined its tail.
“That was the main surprise,” said Alexander Vargas, one of the paleontologists. “This structure is absolutely amazing.”
“The tail was covered with seven pairs of osteoderms … producing a weapon absolutely different from anything we know in any dinosaur,” added the researcher during a presentation of the discovery at the University of Chile.
The osteoderms — structures of bony plaques located in the dermal layers of the skin – were aligned on either side of the tail, making it resemble a large fern.
Paleontologists have discovered 80 percent of the dinosaur’s skeleton and estimate that the animal lived in the area 71 to 74.9 million years ago. It was about two meters (almost seven feet) long, weighed 150 kilograms (330 pounds) and was a herbivore.
According to the scientists, who published their research in the journal Nature, the animal could represent a hitherto unknown lineage of armored dinosaur never seen in the southern hemisphere but already identified in the northern part of the continent.
“We don’t know why (the tail) evolved. We do know that within armored dinosaur groups there seems to be a tendency to independently develop different osteoderm-based defense mechanisms,” said Sergio Soto, another member of the team.
The Cerro Guido area, in the Las Chinas valley 3,000 km (1,800 miles) south of Santiago, stretches for 15 kilometers. Various rock outcrops contain numerous fossils.
The finds there allowed the scientists to surmise that present-day America and Antarctica were close to each other millions of years ago.
“There is strong evidence that there is a biogeographic link with other parts of the planet, in this case Antarctica and Australia, because we have two armored dinosaurs there closely related” to the Stegouros, said Soto.
International
Heat wave puts more than 70 million Americans under alerts as temperatures near 46°C
More than 70 million people remained under heat alerts Monday as an intense heat wave continued across the southern United States, particularly Florida and states along the Mexican border, where temperatures and heat indexes could reach as high as 46 degrees Celsius, according to the National Weather Service (NWS).
Several cities recorded or tied temperature records over the weekend and into Monday, including Miami and Fort Lauderdale in Florida; Laredo, Borger and Austin’s airport in Texas; Atlanta, Georgia; Raleigh and Charlotte, North Carolina; and Memphis, Tennessee.
The NWS warned that the heat wave will continue affecting the southern and southeastern United States, with maximum temperatures expected to remain near 38°C to 40°C for several days. The heat index, which combines temperature and humidity to estimate how hot conditions feel, could reach 46°C.
The extreme heat is also spreading into the Southwest, where temperatures began rising again between Monday and Tuesday. Forecast highs in the region range from about 38°C to 43°C.
Heat alerts remain in effect across Nevada, Arizona and California, including areas in southern Arizona and California near the Mexican border, as authorities warn of the risks posed by prolonged extreme temperatures.
The NWS urged residents to limit outdoor activity, stay hydrated, ensure access to air conditioning or cooling centers, and check on vulnerable friends, neighbors and family members.
The United States is experiencing a summer marked by above-average temperatures and repeated heat waves. One of the most intense episodes occurred during the July 4 weekend, when extreme heat was blamed for roughly 30 deaths.
July was the hottest month ever recorded in the United States since measurements began, with the average temperature across the contiguous country approaching 25°C, according to the National Oceanic and Atmospheric Administration (NOAA).
The combination of extreme heat and drought conditions has also fueled wildfires. Nearly 3 million hectares have burned across the country so far in 2026, making it the largest area affected by wildfires in a decade.
International
Trump warns Iran over nuclear ambitions as U.S.-Iran ceasefire deadline passes
U.S. President Donald Trump reiterated Monday that Iran must never be allowed to obtain a nuclear weapon, as a 60-day deadline set under a memorandum of understanding between Washington and Tehran expired without an agreement to end the conflict in the Middle East.
“The number one goal is, and always will be, that Iran cannot have, in any way or under any circumstances, a nuclear weapon,” Trump wrote in a post on his Truth Social platform.
The memorandum, signed on June 17, called for an “immediate and permanent cessation of military operations on all fronts” as part of a broader negotiation process aimed at ending the conflict. However, the deadline expired Monday without a peace agreement, while both Washington and Tehran continued to maintain their respective positions.
The expiration is largely symbolic, as military clashes resumed during the 60-day period. The Strait of Hormuz also remains blocked, contributing to elevated global oil prices.
Trump escalated his rhetoric toward Tehran last Friday, saying he planned to declare the Strait of Hormuz U.S. territory after defeating Iran.
“After we finish defeating Iran, which is being very badly defeated, very soon I will essentially declare the Strait of Hormuz U.S. territory,” Trump said during a political rally in Long Island, New York. He also claimed that the United States currently controls the passage of vessels through the strategic waterway.
Meanwhile, U.S. Treasury Secretary Scott Bessent said Washington is preparing additional economic measures against Iran that he described as unprecedented.
“Stay tuned for new announcements next week because we are going to implement measures unlike anything ever seen in the history of the economic isolation of a country,” Bessent said.
The Treasury secretary indicated that the measures would form part of a broader “double hit” strategy that could also involve maintaining the blockade of Iranian ports.
International
Brazil’s Lula and Flávio Bolsonaro kick off election campaigns amid focus on crime
Public security took center stage Sunday as Brazilian President Luiz Inácio Lula da Silva and Senator Flávio Bolsonaro formally launched their election campaigns, positioning themselves as the leading rivals ahead of the October presidential vote.
Lula, who leads most opinion polls, kicked off his campaign at the Vila Euclides stadium in São Bernardo do Campo, in São Paulo state, while Bolsonaro held his event in Rio de Janeiro, a political stronghold of his family.
During his speech, Lula announced plans to create a new Ministry of Public Security aimed at strengthening coordination between the federal government and Brazil’s states in the fight against crime.
The president pledged a tougher strategy to reclaim territories controlled or influenced by criminal groups. The proposed ministry would help “share responsibilities with the states” and confront those who seek to control favelas and impoverished neighborhoods, Lula told supporters.
The initiative places public security at the heart of Lula’s campaign as he seeks another term in office amid persistent concerns over crime and organized criminal activity in Brazil.
Lula also used his first campaign speech to reinforce his position as a leading figure of Brazil’s left and to criticize his political opponents on the right.
“I will not allow the right to take power,” Lula said, accusing his opponents of having previously mocked children who died because they lacked access to medicine.
“I don’t know what future these people imagine for the Brazilian people,” he added.
Heat wave puts more than 70 million Americans under alerts as temperatures near 46°C
Trump warns Iran over nuclear ambitions as U.S.-Iran ceasefire deadline passes
Brazil’s Lula and Flávio Bolsonaro kick off election campaigns amid focus on crime
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Luigi Mangione Pleads Guilty to Killing UnitedHealthcare CEO Brian Thompson
ICE Plan to Equip Agents With Electric Shock Gloves Raises Abuse Concerns
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Actress Hayden Panettiere Dies at 36, Representative Confirms
Three U.S. Executions Set for Same Day as Trump Pushes to Expand Death Penalty
Colombia Earthquake Death Toll Reaches 265 as Rescue Teams Race Against Time
Trump warns Iran over nuclear ambitions as U.S.-Iran ceasefire deadline passes
Heat wave puts more than 70 million Americans under alerts as temperatures near 46°C
Brazil’s Lula and Flávio Bolsonaro kick off election campaigns amid focus on crime
ICE Plan to Equip Agents With Electric Shock Gloves Raises Abuse Concerns
Luigi Mangione Pleads Guilty to Killing UnitedHealthcare CEO Brian Thompson
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