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.

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“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.

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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.

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“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.

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“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.

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International

WHO worker killed as Israeli forces fire on Gaza medical convoy

An employee of the World Health Organization (WHO) was killed on Monday in Gaza Strip after Israeli forces opened fire on a medical convoy transporting patients for evacuation, according to witnesses and official accounts.

The Israel Defense Forces (IDF) said the vehicle approached troops in a “threatening manner,” alleging that the driver accelerated toward soldiers despite warning shots. “The troops fired warning shots. The vehicle continued advancing, and additional fire was directed at it,” the military said in a statement.

The army also claimed the vehicle lacked clear markings and was therefore treated as a potential threat.

However, survivors disputed that account. Raed Aslan, a passenger in the convoy, told reporters in Khan Younis that the vehicles were clearly marked with WHO insignia. “The vehicle was clearly identified as belonging to the WHO,” he said, adding that an Israeli tank blocked the road and fired at the driver despite the route being empty.

The convoy was transporting patients to the Rafah crossing, the only exit point available for medical evacuations abroad, as Israel does not permit transfers to Jerusalem or the West Bank.

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The incident adds to a series of controversial cases involving Israeli military actions against humanitarian convoys. In April 2024, seven workers from World Central Kitchen were killed in an Israeli strike in Deir al-Balah. The military initially cited a “misidentification,” despite the vehicles being clearly marked.

Similarly, in March 2025, 15 paramedics, rescuers, and a UN worker were killed near Rafah. Israeli authorities first claimed emergency lights were off, but video evidence later contradicted that assertion.

A subsequent investigation by organizations including Forensic Architecture found that Israeli forces fired hundreds of rounds at the convoy, and that the vehicles were later destroyed and buried along with the bodies before being recovered days later.

The latest incident is likely to intensify scrutiny over the conduct of military operations in Gaza, particularly regarding the safety of humanitarian personnel and medical evacuations.

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International

NASA’s Orion sets record as farthest crewed mission from Earth

NASA’s Orion spacecraft set a new milestone on Monday, becoming the crewed space mission to travel the farthest distance from Earth, surpassing the record set by Apollo 13, which reached 400,171 kilometers from the planet.

The Orion capsule, part of the Artemis II mission, achieved the record at 12:57 p.m. Eastern Time as it continued its journey toward the gravitational sphere of influence of the Moon.

The milestone came less than an hour before the crew was scheduled to begin observation activities during its planned lunar flyby.

“From here, in the ‘Integrity Cabin,’ as we surpass the greatest distance humans have ever traveled from Earth, we do so honoring the extraordinary efforts and achievements of those who came before us in human space exploration,” said Canadian astronaut Jeremy Hansen.

The mission, which launched last Wednesday from Cape Canaveral, is designed to orbit the Moon and return to Earth within ten days. According to the schedule, the spacecraft is expected to begin its lunar flyby at 2:45 p.m. ET, concluding around 9:20 p.m.

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International

Petro accuses top guerrilla leader of bribing officers to evade military strikes

Colombian President defends his government's social reforms

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.

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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.