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

Former Trump allies call for removal, cite 25th Amendment amid Iran threats

Former allies of U.S. President Donald Trump on Tuesday called for his removal from office, arguing he is unfit to continue in the role following recent threats to “wipe out an entire civilization,” made just hours before the deadline of his ultimatum to Iran.

One of the most prominent voices was former Republican congresswoman Marjorie Taylor Greene, who invoked the 25th Amendment of the U.S. Constitution as a mechanism to remove the president from power.

“25th Amendment! Not a single bomb has fallen on the U.S. We cannot annihilate an entire civilization. This is evil and insanity,” Greene wrote on social media platform X.

Greene, once a leading figure within Trump’s political movement during his first term, broke with the president last November over disagreements on foreign policy and his handling of controversial cases.

Another former supporter, controversial commentator Alex Jones, also raised the possibility of applying the constitutional provision during his show, in a conversation with attorney Robert Barnes.

Barnes explained that invoking the 25th Amendment requires the support of two-thirds of Congress, making it a more complex process than impeachment.

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Section 4 of the amendment, ratified in 1967, establishes that the vice president, together with a majority of the cabinet, can declare the president unable to perform the duties of the office, a decision that must then be confirmed by both chambers of Congress.

The statements come amid rising international tensions and increasing domestic political pressure on the president.

International

Trump pauses strikes on Iran, extends ultimatum by two weeks

The president of the United States, Donald Trump, announced a temporary suspension of attacks against Iran for a period of two weeks, extending the ultimatum he had imposed on Tehran just hours before its deadline.

According to the president, the measure is conditional on Iran allowing the “full, immediate, and secure” reopening of the Strait of Hormuz. Trump stated that the decision would involve a reciprocal ceasefire between both parties.

The announcement was made through a message on his social media platform, where he emphasized that the pause in military actions is intended to create space for de-escalation in the region.

He also noted that the decision followed a conversation with the prime minister of Pakistan, Shehbaz Sharif, who requested a two-week extension of the ultimatum.

The move comes amid heightened global tensions, marked by escalating threats and concerns over the potential impact of the conflict on key international energy trade routes.

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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.