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
U.S. to Limit Visa Duration for Foreign Students and Journalists
The United States has announced new limits on the legal length of stay for foreign students and journalists, marking the latest tightening of immigration policies under President Donald Trump.
The changes, outlined in an administrative rule published on Thursday, are expected to take effect in September, unless Congress blocks the measure.
Under the new policy, holders of student visas will be allowed to remain in the United States for no more than four years.
Foreign journalists will be limited to 240-day stays—approximately eight months—with the possibility of applying for extensions of the same duration.
The policy imposes even stricter rules on Chinese journalists, whose visas will be capped at 90 days.
More than 100 international news organizations and press freedom groups, including Agence France-Presse (AFP), criticized the measure in an open letter, arguing that it would reduce both the quantity and quality of international coverage of events in the United States.
The Republican Party, led by President Trump, currently holds a majority in Congress and has pledged to curb both illegal immigration and certain forms of legal immigration.
Previously, the United States generally issued student visas for the full duration of an academic program, while foreign journalists could receive visas valid for up to five years.
Central America
Nicaragua Cuts Diplomatic Ties With Italy Over Red Brigades Dispute
The Nicaraguan government announced on Thursday that it is severing diplomatic relations with Italy following criticism from the Italian government over Nicaragua’s long-standing decision to shelter Alessio Casimirri, a former member of the Red Brigades convicted in Italy for the 1978 kidnapping and murder of former Prime Minister Aldo Moro.
Italian Foreign Minister Antonio Tajani criticized the administration of co-presidents Daniel Ortega and Rosario Murillo on Wednesday for continuing to provide refuge to Casimirri, who was sentenced in Italy to six life terms for his role in Moro’s abduction and killing.
In a statement issued Thursday, Nicaragua’s Foreign Ministry said it was ending all diplomatic relations with Italy, describing Tajani’s remarks as “unjustified, aggressive, and irresponsible.”
Tajani made the comments during a gathering of conservative leaders from Europe and Latin America held in Madrid.
“We have absolutely nothing in common with the positions of extremist governments such as Nicaragua, a country that continues to harbor dangerous Red Brigades terrorists like Alessio Casimirri,” Tajani said, according to Italian media.
The diplomatic break marks a new escalation in tensions between the two countries over the decades-old case involving Casimirri, who has lived in Nicaragua for many years despite repeated calls from Italy for his extradition.
International
U.S. Strikes Hit Areas Near Strait of Hormuz as Tensions With Iran Escalate
Several U.S. strikes targeted areas near the Strait of Hormuz on Thursday, according to Iranian state media citing local authorities, as hostilities between the United States and Iran intensified.
Officials in Iran’s Hormozgan Province said the island of Qeshm was struck multiple times by what they described as U.S. missiles during the evening. The reports were carried by the Iranian news agencies Fars and Tasnim.
Iranian state television also reported that the Bandar Abbas region, located on the Iranian coast overlooking the Strait of Hormuz, was the target of what authorities described as an “enemy U.S. air attack.”
According to local officials quoted by state television, no casualties have been reported following the strikes.
The reported attacks come amid renewed military tensions between Washington and Tehran, although U.S. authorities had not immediately commented on the reported operations.
U.S. to Limit Visa Duration for Foreign Students and Journalists
Nicaragua Cuts Diplomatic Ties With Italy Over Red Brigades Dispute
U.S. Strikes Hit Areas Near Strait of Hormuz as Tensions With Iran Escalate
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