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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.

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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.

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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.

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Central America

U.S. Authorities Accuse Guatemalan Nationals of Using False Information to Sponsor Migrant Minors

Senior officials from the U.S. Department of Justice and the Department of Homeland Security announced Thursday criminal charges against three Guatemalan citizens accused of using false information to sponsor migrant children who crossed the U.S.-Mexico border without a parent or guardian.

According to an indictment filed in Ohio, Maritza Cahuec Coc allegedly submitted at least 12 sponsorship applications, several of which were filed under aliases or contained materially false statements intended to secure custody of the minors.

Under U.S. procedures, unaccompanied migrant children apprehended at the southern border are placed in the custody of the Department of Health and Human Services, which is responsible for their care until they can be released to a qualified sponsor, such as a parent or relative living in the United States.

Prosecutors allege that Cahuec Coc, who reportedly entered the United States illegally in 2018, received payments between late 2020 and 2023 for helping bring 12 migrant minors into the country. Authorities claim she submitted fraudulent documents and misleading information to obtain approval for the sponsorship requests.

The case was announced during a joint press conference led by Acting Deputy Attorney General Todd Blanche and Homeland Security Secretary Markwayne Mullin. However, officials provided limited details about the investigation and instead focused much of their remarks on criticizing immigration policies implemented under the previous administration.

Republican lawmakers and Trump administration officials have frequently pointed to the increase in unaccompanied migrant children arriving at the U.S.-Mexico border during President Joe Biden’s term, arguing that the government failed to adequately oversee their care and placement.

During Thursday’s briefing, A. Tysen Duva, Assistant Attorney General for the Justice Department’s Criminal Division, alleged that Cahuec Coc used the identities of other individuals and falsely claimed family relationships in order to obtain custody of the children.

“Maritza submitted sponsorship applications using other people’s identities and falsely represented that the minors were the children of close relatives in order to secure their release,” Duva said.

The case remains under investigation, and federal authorities have not yet disclosed additional information regarding the other two Guatemalan nationals charged in connection with the alleged scheme.

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International

Iván Cepeda Open to Revising Colombia’s Peace Policy Ahead of Runoff Election

Colombian presidential candidate Iván Cepeda said Thursday that he is willing to introduce “necessary changes” to the peace policy implemented by President Gustavo Petro, a strategy he helped design and promote during the current administration.

The future of Petro’s controversial “Total Peace” initiative has become one of the central issues in Colombia’s presidential runoff election, scheduled for June 21, where Cepeda will face right-wing candidate Abelardo de la Espriella.

De la Espriella, who narrowly won the first round of voting on May 31, has campaigned on a platform of tougher security measures and a stronger crackdown on drug trafficking and armed criminal groups.

Speaking to AFP in Bogotá, Cepeda acknowledged that adjustments to the peace strategy may be required after Petro’s efforts to negotiate with armed organizations failed to produce the expected results amid a surge in violence across the country.

“We are going to make the necessary changes, of course. We will conduct an assessment,” the 63-year-old senator said during the interview, held ten days before the decisive runoff vote.

Cepeda, a philosopher and longtime human rights advocate, explained that any modifications to the policy would emerge from a broad national dialogue involving political leaders, social organizations and other sectors of Colombian society. However, he did not provide specific details about the proposed changes.

President Gustavo Petro’s “Total Peace” initiative sought to negotiate agreements with guerrilla movements, paramilitary groups and major criminal organizations, including the powerful Clan del Golfo cartel and the National Liberation Army (ELN).

The policy aimed to reduce violence through dialogue and negotiated settlements, but critics argue that it failed to significantly weaken armed groups or improve security conditions in several regions of the country.

As the runoff campaign enters its final stage, the future direction of Colombia’s security and peace policies remains one of the most closely watched issues in the election.

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International

U.S. Halts Military Action Against Iran Amid Diplomatic Breakthrough

U.S. President Donald Trump announced Thursday the suspension of military strikes that had been scheduled against Iran later that evening, citing significant progress in negotiations aimed at ending the conflict that erupted in late February.

In a message posted on social media, Trump said the decision followed high-level discussions with Iranian representatives, which he claimed led to broad agreements on the key elements of a future peace deal.

According to the president, the “final points” of the proposed agreement have been approved in principle and outlined by the parties involved. Trump identified the United States, Israel, Saudi Arabia, the United Arab Emirates, Qatar, Turkey, Pakistan, Bahrain, Kuwait, Jordan and Egypt as participants in the diplomatic process.

The U.S. leader also stated that the naval blockade imposed on Iran will remain in place while negotiations continue. He added that the date and location for the formal signing of the agreement will be announced in the coming days. No specific details regarding the content of the deal have been released so far.

The announcement marks a significant shift from comments made by Trump just hours earlier, when he warned of additional military strikes against Iranian territory and reiterated threats involving key oil infrastructure within the Islamic Republic.

The decision comes amid a renewed escalation of tensions between Washington and Tehran. In recent days, both sides have exchanged military attacks while diplomatic efforts intensified to prevent a broader conflict in the Middle East.

Iran’s Revolutionary Guard recently claimed responsibility for drone attacks targeting U.S. military facilities in several countries across the region. Iranian officials described the operations as retaliation for American strikes against Iranian targets.

Although Trump’s announcement has been viewed as a sign of de-escalation, questions remain regarding the viability of the proposed agreement and the long-term stability of the negotiations. International analysts warn that the situation remains fragile and that any new incident could quickly reignite hostilities between the two countries.

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