International
Chile’s distant paradise where scientists study climate change
AFP | Alberto Peña
Hidden inside pristine forests in Chile’s deep south, known as the end of the world, lie potential early warning signs of climate change. Puerto Williams on Navarino island, which is separated from the South American mainland by the Beagle Channel, is the world’s southern-most town.
Far from the pollution that blights major urban and industrial centers, it is a paradise that provides unique conditions to study global warming.
“There is nowhere else like it,” Ricardo Rozzi, director of the Cape Horn International Center for global change studies and bio-cultural conservation in Puerto Williams, told AFP.
It is “a place that is especially sensitive to climate change” as average temperatures do not rise above five degrees Celsius. This cold and windy area is the last inhabited southern frontier before reaching the Antarctic.
The ethnobotanical Omora park is home to an immense variety of lichens, mosses and fungi that scientists study by crouching down onto their knees with magnifying glasses.
In the crystal clear Robalo river, minuscule organisms act as sentinels of the changes produced by global warming. In both the park and river, the alarm bells are ringing.
Moss and lichen on the move
At this latitude — 55 degrees south — climate change has an exponential effect on flora that react by seeking out low temperatures, said Rozzi, 61. “The most obvious aspect of climate change is the rising temperatures,” he said. “These lichens cannot survive” if a certain threshold is passed. To escape the higher temperatures, they move.
“In the case of (mosses) we’ve noticed that they have moved. Before they were between 50 and 350 (meters above sea level) and now they are between 100 and 400,” said Rozzi. He says Omora has more diversity per square meter of lichens and mosses than anywhere else in the world. They also help to absorb carbon dioxide.
Another aspect is the elevational diversity gradient, an ecological pattern in which biodiversity changes with elevation.
The 700-meter high Bandera hill’s biodiversity changes every 200 meters and there is a mammoth 1.5 degrees Celsius difference in temperature between top and bottom.
“We can see what changes happen in the high mountains and in the area close to the sea in a very short distance, and we can see how the temperature affects the biodiversity that lives in this river,” Tamara Contador, 38, a biologist at the Cape Horn International Center, told AFP.
She studies the gradients themselves. If the height difference between gradients rises or falls on the mountain, scientists can determine whether there has been a global change in temperature. They say there has been.
Avoiding ‘extermination’
“On a global level, the polar and subpolar ecosystems are the most affected by climate change, so we are in a place where climate change has a much bigger effect on biodiversity than other places,” said Contador.
River organisms also form part of the alert system.
“The organisms that live here are also indicators of water quality and global environmental change,” added Contador.
River organisms move about and have already increased their reproductive cycle, says Rozzi. This confirms there has been a small change to the climate in the area that could have been much greater elsewhere on the planet.
“Some insects that have an annual eggs to larvae to adulthood cycle are now having two cycles because the temperature has risen,” said Rozzi.
By studying these organisms and learning from them “we can avoid crossing the threshold that brings us to the extermination of humanity and other life forms,” he added.
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A glacier over Darwin's mountain range is seen during a journey through the Beagle Channel in the Magallanes region, the southernmost of Chile, on September 23, 2022. - There is a place at the end of the world, in the southernmost point of Chile, where pristine forests hide tiny systems in their depths that already give early warning of the global climate change that the planet is suffering. Beyond the place where the American continent ends, on Navarino Island, crossing the Beagle Channel, Puerto Williams stands as the southernmost city in the world, a place far from pollution and human mistreatment, with unique conditions for the study of climate change. (Photo by Alberto PEÑA / AFP)
International
Iran Rejects Negotiations With U.S. as Strait of Hormuz Remains Blocked Amid New Attack
Tensions remained high in the Strait of Hormuz on Monday after a vessel was hit by a projectile, despite U.S. President Donald Trump’s claims that negotiations with Iran were moving forward and that the strategic maritime route could reopen as early as Tuesday.
Tehran denied that direct talks were taking place, but Trump insisted that discussions were underway and described the situation as a final opportunity for Iran to reach an agreement.
“This is the last chance they have to sign a good document,” Trump told reporters at the White House, adding that the reopening of the Strait of Hormuz could happen “literally tomorrow” Tuesday.
The comments came after another escalation in rhetoric from Washington. Last week, Trump threatened Iran with military strikes before unexpectedly changing course on Sunday and announcing that negotiations with Tehran would resume.
Iranian Foreign Ministry spokesman Esmail Baqai rejected the U.S. president’s version of events, stating that Tehran was not holding negotiations with Washington.
“At this moment, we are not negotiating with the United States. We are negotiating with Oman to guarantee safe passage through the Strait of Hormuz,” Baqai said.
Earlier, the Iranian official said that Tehran was close to reaching an agreement with Oman, which lies across the Strait of Hormuz, to reopen the crucial waterway that plays a key role in global energy trade.
The maritime route has remained blocked by Iran since the outbreak of hostilities following U.S. and Israeli strikes against the Islamic Republic on February 28.
Meanwhile, Yemen’s Houthi rebels announced Tuesday that they had launched an attack against an airport in Saudi Arabia. The Iran-backed group had previously disrupted the passage of Saudi vessels through the Red Sea, an alternative route used for crude exports by the world’s largest oil producer.
The continued instability in the region has raised concerns over global energy supplies, as the Strait of Hormuz remains one of the most important chokepoints for international oil shipments.
International
Lula Launches Re-Election Campaign Amid Rising Tensions With Trump
Brazilian President Luiz Inácio Lula da Silva is set to be officially nominated for re-election by his Workers’ Party (PT), marking the start of his campaign for a fourth presidential term.
The nomination takes place during the party’s national convention in São Paulo, Brazil’s economic hub, where around 3,000 supporters gathered to back the veteran leftist leader.
“Today I’m here because Lula’s policies changed my life and my family’s. Thanks to him, we finally own a home after eight generations without one,” said Cristiane Rosa Julho, a 51-year-old social worker attending the event dressed in the PT’s signature red.
Seeking the presidency for the seventh time in his political career, Lula is expected to face Senator Flávio Bolsonaro in next year’s election.
The 45-year-old senator is the son of former far-right President Jair Bolsonaro, who has been jailed over his alleged role in an attempted coup following his defeat to Lula in the 2022 election.
The party convention opened with videos highlighting Lula’s social initiatives and speeches by four women praising his leadership, while supporters waved PT flags and held signs reading “We Want Lula as President” and “Brazil Is Not for Sale.”
The campaign begins amid growing tensions with the United States and President Donald Trump, a close ally of the Bolsonaro family who has openly backed several conservative candidates across Latin America.
Last week, Lula warned against foreign interference, declaring, “In Brazil, we do not accept anyone sticking their nose where it doesn’t belong.”
In July, the United States imposed two rounds of tariffs on Brazilian products, accusing the country of unfair trade practices. The measures followed earlier restrictions introduced in 2025, encouraged by Jair Bolsonaro’s son Eduardo Bolsonaro, in response to legal proceedings against the former president.
Lula has vowed to wage what he called a “war of truth against lies” in response to Washington’s pressure and accused Flávio Bolsonaro of undermining Brazil’s interests by allegedly helping the United States damage the country’s economy. The senator has denied the accusations.
The Brazilian president also claims Washington is attempting to influence the country’s political landscape in an effort to prevent his re-election.
International
Truck bomb attack near police station in Colombia leaves 14 injured ahead of presidential inauguration
A truck loaded with explosives exploded on Saturday near a police station in the Colombian city of Cúcuta, close to the Venezuelan border, leaving 14 people injured in an attack that occurred six days before president-elect Abelardo de la Espriella’s inauguration.
The blast took place in the early hours of the morning and was allegedly carried out by members of the National Liberation Army (ELN), who detonated a vehicle packed with explosives. According to the latest report from the Colombian Army, the attack injured 11 police officers and three civilians.
The explosion involved around 15 explosive devices, and two of the wounded officers are in critical condition and “fighting for their lives,” said William Villamizar, governor of Norte de Santander, the region where the attack occurred.
The incident comes amid Colombia’s worst wave of violence in the past decade, with armed groups expanding their presence in several areas of the country.
“I strongly condemn the cowardly terrorist attack carried out in Cúcuta against our National Police. Terrorism will not intimidate Colombia or break the determination of Colombians to live in peace and security,” De la Espriella said in a post on X.
The conservative lawyer, who has been described as a far-right figure, will take office on August 7, replacing Gustavo Petro, Colombia’s first left-wing president. The inauguration ceremony will be held in Cali, the country’s third-largest city and a frequent target of attacks by armed groups.
The United Nations condemned what it described as an “indiscriminate attack” that caused not only injuries but also “fear and distress among the population.”
De la Espriella has repeatedly warned about an alleged plot against his life. Meanwhile, President Gustavo Petro, who is currently visiting Cuba, has not commented on the attack. During his visit, Petro met with Cuban President Miguel Díaz-Canel to discuss what Havana describes as the United States’ “policy of suffocation” toward the island.
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