International
Chilean scientist plans to clean up mining with ‘metal eating’ bacteria
AFP
Starving microorganisms capable of surviving in extreme conditions have already managed to “eat” a nail in just three days.
In Chile, a scientist is testing “metal-eating” bacteria she hopes could help clean up the country’s highly-polluting mining industry.
In her laboratory in Antofagasta, an industrial town 1,100-kilometers north of Santiago, 33-year-old biotechnologist Nadac Reales has been carrying out tests with extremophiles — organisms that live in extreme environments.
Reales came up with her idea while still at university as she was conducting tests at a mining plant using microorganisms to improve the extraction of copper.
“I realized there were various needs in the mining industry, for example what happened with the metallic waste,” she told AFP.
Some metals can be recycled in smelting plants but others, such as HGV truck hoppers that can hold 50 tons of rock, cannot and are often discarded in Chile’s Atacama desert, home to the majority of the country’s mining industry.
Chile is the world’s largest producer of copper, which accounts for up to 15 percent of the country’s GDP, resulting in a lot of mining waste that pollutes the environment.
In her research, Reales, who now runs her own company Rudanac Biotec, concentrated on iron-oxidizing bacteria called Leptospirillum.
She extracted the bacteria from the Tatio geysers located 4,200 meters above sea level, some 350 kilometers from Antofagasta.
The bacteria “live in an acidic environment that is practically unaffected by relatively high concentrations of most metals,” she said.
“At first the bacteria took two months to disintegrate a nail.”
But when starved, they had to adapt and find a way of feeding themselves.
After two years of trials, the result was a marked increase in the speed at which the bacteria “ate,” devouring a nail in just three days.
– Surprising benefit –
Reales says “chemical and microbiological tests” have proved the bacteria are not harmful to humans or the environment.
“We’ve always seen a lot of potential in this project that has already passed an important test in the laboratory,” said Drina Vejar, a microbiologist who is part of a four-person team working with Reales.
“It’s really necessary at this time when we have to plan for a more sustainable development, especially in all these cities with so many polluting industries.”
Mining companies have shown interest in the research but while Rudanac Biotec previously benefitted from a state fund for start-ups, the company needs investment to move on to its next stage of trials.
Reales says she needs money to see if her method will “eat a medium sized beam or a hopper.”
When the disintegration process is complete, what remains is a reddish liquid residue, a solution known as a lixiviant that itself possesses a surprising quality.
“After biodisintegration the product generated (the liquid) can improve the recovery of copper in a process called hydrometallurgy,” said Reales.
Essentially, the liquid residue can be used to extract copper from rock in a more sustainable manner than the current use of chemicals in leaching.
Reales says it means green mining is “totally feasible.”
That is of great interest to mining companies that could use it to improve their large scale extraction of copper or other minerals, while also reducing their pollution, something they are required to do by law.
Reales recently submitted a request for an international patent for her technology, but more importantly she hopes it will help reduce metal waste blotting the landscape in the mining regions of her country.
International
Petro accuses top guerrilla leader of bribing officers to evade military strikes
The president of Colombia, Gustavo Petro, said Saturday that the country’s most wanted guerrilla leader is bribing members of the security forces to obtain advance information and evade military operations.
According to the government, Iván Mordisco, a dissident leader of the now-defunct FARC, is currently on the run in the जंगल following an الجيش bombardment last week that killed six of his closest collaborators in the department of Vaupés.
Authorities believe the guerrilla commander had been at the site shortly before the operation. “He buys off the commanders who are supposed to capture him; that’s how he escapes the bombings, but leaves his own people to die. He is warned before every strike,” Petro wrote on social media platform X.
The six individuals killed in the strike were part of Mordisco’s security ring, according to Defense Minister Pedro Sánchez.
Local media reported that one of those killed was a woman known as “alias Lorena,” who was allegedly Mordisco’s partner and the mother of his child.
After failed attempts to negotiate peace, Petro’s administration has shifted to a more aggressive military strategy against the guerrilla leader. In recent months, three of Mordisco’s brothers have been captured and now face charges including homicide, kidnapping, and arms trafficking.
Central America
Costa Rica urges China to halt actions against Panama-flagged vessels
The government of Costa Rica on Saturday called on China to halt retaliatory actions against vessels flying the Panamaflag, amid escalating tensions over control of two strategic ports linked to the Panama Canal.
In a statement shared on social media, Costa Rica’s Foreign Ministry warned that the situation “puts global trade at risk” and expressed its “deep concern and strongest condemnation” over what it described as “arbitrary and unjustified delays and inspections in Chinese ports.”
The Costa Rican government urged “full respect for international law, particularly the United Nations Convention on the Law of the Sea,” while reaffirming its “unconditional support and solidarity” with Panama.
San José’s position aligns with growing international criticism from countries including Honduras, Peru, Paraguay, Israeland Ukraine.
Paraguayan authorities described the detentions as “unacceptable” and pointed to what they called “undue pressure” on the Panamanian government.
International
Mexico leads global cases of enforced disappearances, UN report finds
Mexico accounts for the highest number of urgent actions related to enforced disappearances worldwide, according to the latest report by the UN Committee on Enforced Disappearances.
The report, released by I(dh)eas, indicates that Mexico has accumulated 819 cases between 2012 and February 2026, representing 38% of the global total.
In the past five months alone, 40 new urgent requests have been recorded — more than one-third of all such actions worldwide during that period.
The report warns that this trend reflects a structural problem, as the urgent action mechanism — originally intended as an exceptional measure — has become routine in Mexico.
Although the Mexican state formally complies with response deadlines, the Committee identified significant shortcomings in the implementation of these measures. These include the lack of comprehensive search plans, delays in key investigative procedures such as video surveillance and phone data analysis, and insufficient inquiries into possible links involving state agents.
The report also highlights inadequate protection for relatives and individuals involved in search efforts, including cases of reprisals.
Among the most serious incidents documented is the disappearance of a father who had denounced alleged involvement of authorities in his son’s case in the state of Guanajuato.
The accumulation of cases could lead to the application of Article 34 of the Convention, which would allow for the launch of an international investigation into systematic enforced disappearances.
Geographically, the state of Chiapas accounts for 30% of the new urgent actions, many of them linked to collective disappearances of migrants.
Petro accuses top guerrilla leader of bribing officers to evade military strikes
Costa Rica urges China to halt actions against Panama-flagged vessels
Mexico leads global cases of enforced disappearances, UN report finds
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