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
Colombia says it would not reject Maduro asylum request as regional tensions escalate
The Colombian government stated on Thursday that it would have no reason to reject a potential asylum request from Venezuelan President Nicolás Maduro should he leave office, as regional tensions persist over the deployment of U.S. military forces in the Caribbean since August.
“In the current climate of tension, negotiations are necessary, and if the United States demands a transition or political change, that is something to be assessed. If such a transition results in him (Maduro) needing to live elsewhere or seek protection, Colombia would have no reason to deny it,” said Colombian Foreign Minister Rosa Villavicencio in an interview with Caracol Radio.
However, Villavicencio noted that it is unlikely Maduro would choose Colombia as a refuge. “I believe he would opt for someplace more distant and calmer,” she added.
Colombian President Gustavo Petro also commented on Venezuela’s situation on Wednesday, arguing that the country needs a “democratic revolution” rather than “inefficient repression.” His remarks followed the recent detention and passport cancellation of Cardinal Baltazar Porras at the Caracas airport.
“The Maduro government must understand that responding to external aggression requires more than military preparations; it requires a democratic revolution. A country is defended with more democracy, not more inefficient repression,” Petro wrote on X (formerly Twitter), in a rare public criticism of the Venezuelan leader.
Petro also called for a general amnesty for political opponents and reiterated his call for forming a broad transitional government to address Venezuela’s prolonged crisis.
Since September, U.S. military forces have destroyed more than 20 vessels allegedly carrying drugs in Caribbean and Pacific waters near Venezuela and Colombia, resulting in over 80 deaths.
U.S. President Donald Trump has repeatedly warned that attacks “inside Venezuela” will begin “soon,” while Maduro has urged Venezuelans to prepare for what he describes as an impending external aggression.
International
Cuba battles out-of-control dengue and chikungunya epidemic as death toll rises to 44
Cuba is facing a severe dengue and chikungunya epidemic that has already claimed at least 44 lives, including 29 minors, according to the Ministry of Public Health (Minsap). The outbreak—now considered out of control—has expanded across the entire country amid a critical shortage of resources to confront the emergency.
Authorities report more than 42,000 chikungunya infections and at least 26,000 dengue cases, though they acknowledge significant underreporting as many patients avoid seeking care in health centers where medicines, supplies, and medical personnel are scarce. The first cluster was detected in July in the city of Matanzas, but the government did not officially use the term “epidemic” until November 12.
Chikungunya—virtually unknown on the island until this year—causes high fever, rashes, fatigue, and severe joint pain that can last for months, leaving thousands temporarily incapacitated. Dengue, endemic to the region, triggers fever, muscle pain, vomiting, and, in severe cases, internal bleeding. Cuba currently has no vaccines available for either virus.
Minsap reports that of the 44 deaths recorded so far, 28 were caused by chikungunya and 16 by dengue.
The health crisis unfolds amid deep economic deterioration, marked by the absence of fumigation campaigns, uncollected garbage, and shortages of medical supplies—conditions that have fueled the spread of the Aedes aegypti mosquito, the primary vector for both diseases. “The healthcare system is overwhelmed,” non-official medical sources acknowledge.
Beyond the health impact, the epidemic is heavily disrupting economic and family life. The intense joint pain caused by chikungunya has led to widespread work absences, while hospital overcrowding has forced relatives to leave their jobs to care for the sick. In November, authorities launched a clinical trial using the Cuban drug Jusvinza to reduce joint pain, though results have not yet been released.
International
Ecuador on track for record violence as homicides hit highest level in Latin America again
Violence in Ecuador is expected to reach historic levels by the end of 2025, with the country set to record the highest homicide rate in Latin America for the third consecutive year, according to a report released Thursday by the Armed Conflict Location & Event Data Project (ACLED). The organization warns that criminal activity is not only persisting but could worsen in 2026.
Official figures show 7,553 homicides recorded through October, surpassing the 7,063 registered throughout all of 2024. ACLED estimates that 71% of the population was exposed to violent incidents this year, despite President Daniel Noboa’s declaration of an “internal armed conflict” in an attempt to confront powerful criminal groups.
According to the report, several factors are driving the deterioration of security: a territorial war between Los Chonerosand Los Lobos, the two most influential criminal organizations in the country; the fragmentation of other groups after the fall of their leaders; and Ecuador’s expanding role as a strategic hub for regional drug trafficking.
Since 2021, violence has forced the internal displacement of around 132,000 people, while more than 400,000 Ecuadorians — equivalent to 2% of the population — have left the country. Between January and November alone, violent deaths rose 42%, fueled by prison massacres and clashes between rival gangs.
The report warns that conditions may deteriorate further. Ecuador has been added to ACLED’s 2026 Conflict Watchlist, which highlights regions at risk of escalating violence. The expansion of Colombian armed groups such as FARC dissidents and the ELN, state weakness, and a potential rerouting of drug trafficking corridors from the Caribbean to the Pacific intensify the threat.
“The president is facing a wave of violence that shows no signs of easing,” the report concludes.
Colombia says it would not reject Maduro asylum request as regional tensions escalate
Cuba battles out-of-control dengue and chikungunya epidemic as death toll rises to 44
Ecuador on track for record violence as homicides hit highest level in Latin America again
Tec de Monterrey honors one of its students for his contribution to nanotechnology in medicine
Defense Minister commends salvadoran soldier for Central American Cross Country victory
Extension of the state of emergency approved in southern Chile
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