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Exploring How Gas Fuels Diverse Microbial Life in Caves – Sciworthy

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Caves are often dark, damp, and remote. While they lack the nutrients and energy sources that sustain life in other ecosystems, they still host a diverse array of bacteria and archaea. But how do these microorganisms acquire enough energy to thrive? A team of researchers from Australia and Europe investigated this intriguing question by examining Australian caves.

Previous studies identified that microorganisms in nutrient-poor soils can harness energy from the atmosphere through trace gases, including hydrogen, carbon monoxide, and methane. These gases are present in minute quantities, classified as trace gases. Microbes possess specific proteins that can accept electrons from these gas molecules, enabling them to utilize these gases as energy sources, such as hydrogenase, dehydrogenase, or monooxygenase, fueling their metabolic processes.

The Australian research team hypothesized that cave-dwelling microbes may be using trace gases for survival. To test this, they studied four ventilated caves in southeastern Australia. The researchers collected sediment samples at four points along a horizontal line that extended from the cave entrance to 25 meters (approximately 80 feet) deep inside the cave, resulting in a total of 94 sediment samples.

The team treated the sediment samples with specific chemicals to extract microbial DNA, using it to identify both the abundance and diversity of microorganisms present. They found multiple groups of microorganisms throughout the cave, including Actinobacteria, Proteobacteria, Acidobacteria, Chloroflexota, and Thermoproteota. Notably, the density and diversity of microbes were significantly higher near the cave entrance, with three times more microorganisms in those regions compared to further inside.

The team utilized gene sequencing to analyze the microbial DNA for genes linked to trace gas consumption. Results revealed that 54% of cave microorganisms carried genes coding for proteins involved in utilizing trace gases like hydrogenases, dehydrogenases, and monooxygenases.

To assess the generality of their findings, the researchers searched existing data on microbial populations from 12 other ventilated caves worldwide. They discovered that genes for trace gas consumption were similarly prevalent among other cave microorganisms, concluding that trace gases might significantly support microbial life and activity in caves.

Next, the researchers measured gas concentrations within the caves. They deployed static magnetic flux chambers to collect atmospheric gas samples at four points along the sampling line, capturing 25 milliliters (about 1 ounce) of gas each time. Using a gas chromatograph, they analyzed the samples and found that the concentrations of hydrogen, carbon monoxide, and methane were approximately four times higher near the cave entrance compared to deeper areas. This suggests that microorganisms might be metabolizing these trace gases for energy.

To validate their findings further, they constructed a static magnetic flux chamber in the lab, incubating cave sediment with hydrogen, carbon monoxide, and methane at natural concentration levels. They confirmed that microbes also consumed trace gases in controlled conditions.

Finally, the researchers explored how these cave microbes obtained organic carbon. They conducted carbon isotope analysis, focusing on carbon-12 and carbon-13 ratios, which can vary based on microbial metabolic processes. Using an isotope ratio mass spectrometer, they determined that cave bacteria had a lower percentage of carbon-13, indicating their reliance on trace gases to generate carbon within the cave ecosystem.

The researchers concluded that atmospheric trace gases serve as a crucial energy source for microbial communities in caves, fostering a diverse array of microorganisms. They recommended that future studies examine how climatic changes, such as fluctuations in temperature and precipitation, might influence the use of atmospheric trace gases by cave-dwelling microorganisms.

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Source: sciworthy.com

How Misinformation on Social Media Fuels the Tension Between India and Pakistan

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An unseen conflict unfolded earlier this month as missiles and drones flew through the night sky separating India and Pakistan.

Following the Indian government’s announcement of Operation Sindoah, rumors of Pakistan’s defeat rapidly circulated online, fueled by military strikes on Pakistan and extremist assaults in Kashmir, which prompted condemnation from Delhi towards Islamabad.

What initially started as a mere assertion on social media platforms like X quickly escalated into a cacophony boasting India’s military strength, labeled as “breaking news” and “exclusive” on one of the country’s leading news channels.

These posts and reports claimed that India had downed several Pakistani jets, captured pilots and Karachi ports, and taken control of Lahore. Additional unfounded claims suggested that the powerful chief of the Pakistani military had been arrested and a coup executed. A widely shared post stated, “We’ll be having breakfast in Rawalpindi tomorrow,” referencing the Pakistani city housing the military headquarters amidst the ongoing hostilities.

Many of these assertions included videos of explosions, collapsing buildings, and missiles being launched from the air. The issue was that none of these were factual.

“Global Trends in Hybrid Warfare”

The ceasefire on May 10th momentarily steered both nations away from the brink of full-scale war after an intense escalation in decades, triggered by extremists targeting tourist sites in Indian-controlled Kashmir—resulting in the deaths of 26 individuals, mostly tourists from India. India swiftly condemned Pakistan for the atrocities, while Islamabad denied involvement.

Even with the cessation of military hostilities, analysts, fact-checkers, and activists have meticulously tracked the surge of misinformation that proliferated online during this conflict.

In Pakistan, misinformation also spread widely. Just before the conflict erupted, the Pakistani government lifted a ban on X, which researchers later identified as a source of misinformation, albeit not at the same magnitude as in India.

A fabricated image intended to depict fighter planes engaging in combat in Udangh Haar, India. Photo: x

Claims of military victories from Pakistan circulated heavily on social media, paralleling an uptick in recycled AI-generated footage that was amplified by mainstream media outlets, prominent journalists, and government officials, leading to false narratives about captured Indian pilots, military coups, and dismantling India’s defenses.

Additionally, fabricated reports circulated that claimed Pakistan’s cyber attacks had largely disabled India’s power infrastructure, and that Indian troops were surrendering by raising white flags. Particularly, video game simulations became a favored method of disseminating misinformation about Pakistan that portrayed India in a favorable light.

A recent report on social media conflicts surrounding the India-Pakistan situation, released last week by the civil society organization The London Story, elaborated on how platforms like X and Facebook have become fertile grounds for spreading wartime narratives, hate speech, and emotionally charged misinformation, leading to an environment rich in nationalist fervor on both sides.

In a written statement, a representative from Meta, the parent company of Facebook, claimed to have implemented “significant steps to combat misinformation,” including the removal and labeling of misleading content and limiting the reach of stories flagged by fact-checkers.

Joyojeet Pal, an associate professor at the University of Michigan’s Faculty of Information Studies, remarked that the magnitude of misinformation in India has “surpassed anything seen previously,” impacting both sides of the conflict.

PAL has noted that misinformation campaigns have outstripped the typical nationalist propaganda prevalent in both India and Pakistan.

Fraudulent images purporting to show the Narendra Modi Stadium in India on abandoned islands have circulated and been debunked on X. Photo: x

Analysts argue this exemplifies the emerging digital battleground of warfare, where strategic misinformation is weaponized to manipulate narratives and heighten tensions. Fact-checkers point out that the proliferation of misinformation, such as old footage and misleading military victory claims, mirrors earlier patterns seen in Russia’s initial stages of its conflict.

The Hate Research Centre (CSOH) based in Washington, D.C., has tracked and recorded misinformation from both nations, cautioning that the manipulation of information in the recent India-Pakistan conflict is “not an isolated occurrence but part of a larger global trend in hybrid warfare.”

CSOH Executive Director Raqib Hameed Naik stated that some social media platforms experienced “significant failures” in managing and controlling the spread of disinformation generated from both India and Pakistan. Out of 427 key CSOH posts analyzed on X, many garnered nearly 10 million views, yet only 73 were flagged with warnings. X did not respond to inquiries for comment.

Initial fabricated reports from India predominantly circulated on X and Facebook, often shared by verified right-wing accounts. Numerous posts openly expressed support for the Bharatiya Janata Party (BJP) government, which is known for its Hindu nationalist stance. Some BJP politicians even shared this content.

Deepfake videos altering the speeches of Narendra Modi and other Indian officials have been disseminated on the same platforms that propagated them. Photo: x

Examples circulating included 2023 footage of Israeli airstrikes in Gaza incorrectly labeled as Indian strikes against Pakistan, and images from Indian naval drills misrepresented as proof of an assault on Karachi Port.

Images from video games falsely portrayed as real-life footage of the Indian Air Force defeating a Pakistani JF-17 fighter jet were circulated, alongside scenes from the Russian-Ukrainian conflict being claimed as “major airstrikes in Pakistan.” AI-generated visuals of purported victories for India were also disseminated, as well as manipulated videos of Turkish pilots presented in fabricated reports of captured Pakistani personnel. Additionally, doctored images were used in misleading reports about the assassination of Pakistan’s former Prime Minister Imran Khan.

Many of these posts, initially generated by Indian social media users, achieved millions of views, and such misinformation was later featured in some of India’s most prominent television news segments.

“The Fog of War Accepted as Reality”

The credibility of Indian mainstream media, already diminished by the government’s strong influence under Modi, now faces difficult scrutiny. Several prominent anchors have issued public apologies.

The Indian human rights organization Citizens for Citizens (CJP) lodged a formal complaint with the broadcasting authority, citing “serious ethical violations” in the coverage of Operation Sindoah across six major television networks.

CJP Secretary Teesta Setalvad stated that these channels have completely neglected their duty as impartial news sources, turning into “propaganda collaborators”.


Kanchan Gupta, a senior adviser to India’s Ministry of Information and Broadcasting, refuted claims of governmental involvement in the misinformation efforts. He asserted that the government is “very cautious” about misinformation and has provided clear guidelines for mainstream media reporting on the conflict.

“We established a surveillance center operating 24/7 to monitor any disinformation that could have a cascading effect, and a fact check was promptly issued. Social media platforms collaborated to eliminate a multitude of accounts promoting this misinformation.

Gupta noted “strong” notifications had been sent to several news channels for broadcasting rule violations. Nonetheless, he emphasized that the chaos of war is widely regarded as a tangible reality, wherein the nature of reporting—regardless of it being an overt or covert conflict—tends to escalate in intensity.

Source: www.theguardian.com

A New Method of Supplying Lithium Can Make Fusion Fuels Greener

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Nuclear fusion reactor illustration

Science Photo Library / Aramie

Infinite power from nuclear fusion can be brought one step closer following the accidental discovery of a new process to supply isotope lithium-6, essential to providing fuel to sustainable fusion reactors.

The most challenging fusion process combines two isotopes of hydrogen, deuterium and tritium to produce helium, neutrons and many more energy. Tritium, a rare radioisotope of hydrogen, is difficult to procure and expensive. The “Breeder” reactor aims to produce tritium by bombarding lithium with neutrons.

Lithium atoms exist as two stable isotopes. Lithium-7 accounts for 92.5% of natural elements, with the remainder being lithium 6. The more rare isotopes react with neutrons much more efficiently and produce tritium in fusion reactions.

However, separating the two lithium isotopes is extremely difficult. Until now, this has been achieved on a large scale using highly toxic processes that depend on mercury. Environmental impacts have forced the process to be unemployed in Western countries since the 1960s, forcing researchers to rely on a decline in the stockpile of lithium-6 produced before the ban.

Sarbajit Banerjee Eth Zurich and his colleagues in Switzerland happened to discover alternatives while considering ways to clean water contaminated by oil drilling.

Researchers noticed that cement membranes containing lab-made compounds called Zeta vanadium oxide collect large quantities of lithium and appear to separate lithium-6 disproportionately.

Zetavanadium oxide contains tunnels surrounded by oxygen atoms, Banerjee says. “Lithium ions pass through these tunnels, which just happens to be the right size. [to bind lithium-6]”We found that lithium-6 ions bond more strongly and are retained within the tunnel.”

Researchers don’t fully understand why lithium-6 is preferentially retained, but based on simulations they believe it is related to the interaction between ions and atoms at the edge of the tunnel, says Banerjee.

He says he has not separated less than six grams of lithium to date, but he wants to expand the process to produce tens of kilograms of isotopes. Commercial fusion reactors are expected to require large amounts of elements every day.

“But these challenges become pale compared to the major challenges with laser ignition for plasma reactors and fusion,” says Banerjee.

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Source: www.newscientist.com

Record high CO2 emissions driven by drought, fires, and use of fossil fuels

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Wildfires in the tropics caused a slight increase in CO2 emissions, but most of that was due to burning fossil fuels

Carl De Souza/AFP/Getty Images

Carbon dioxide emissions from burning fossil fuels in 2024 are expected to exceed last year's record levels, dashing hopes that global warming emissions will peak this year.

“Reducing emissions is more urgent than ever, and the only way to do that is by significantly reducing fossil fuel emissions,” he said. Pierre Friedlingstein At the University of Exeter, UK.

This is according to the latest global carbon budget. reporta preliminary calculation of CO2 emissions to date, including projections until the end of the year, prepared by Friedlingstein and his colleagues. The announcement was made at the ongoing COP29 summit in Azerbaijan, where countries aim to set new fiscal targets to combat climate change.

Last year, some researchers predicted a peak in emissions in 2024, but the report found that anthropogenic CO2 emissions would reach a record high of 41.6 gigatonnes in 2024, up 2% from the 2023 record. It has been revealed that the number is expected to increase. Almost 90% of that total is made up of emissions from fossil fuel combustion. The remainder is primarily due to land changes caused by deforestation and wildfires.

Fossil fuel emissions will grow at 0.8 percent, half as much as in 2023, but still higher than the average growth rate over the past decade. “[The slower rate] This is a good sign, but we are still miles away from reaching our goal,” says Friedlingstein.

Despite a long-term downward trend, projected emissions from land-use change also increased this year, mainly due to drought-induced wildfires in the tropics. Part of this increase is also due to the collapse of terrestrial sinks of carbon in 2023, which typically removes about a quarter of annual CO2 emissions from the atmosphere. This absorption decreased by more than 40 percent last year and in early 2024 as global temperatures soared due to El Niño.

“2023 is an amazing demonstration of what can happen in a warmer world when El Niño droughts and fires combine to create record global temperatures,” he says. pep canadel He is a researcher at Australia's Commonwealth Scientific and Industrial Research Agency and co-author of this report. “Taken all together, the world's forests contributed almost a third less carbon dioxide from the atmosphere last year than they did in the previous decade.”

This will also increase emissions in 2024, but researchers expect this “land carbon sink” to largely recover as the warming effects of El Niño fade. “This is not a long-term collapse,” Friedlingstein says.

The report reveals that China's CO2 emissions, which emit almost a third of the world's total emissions, are projected to increase by only 0.2% in 2024 compared to 2023. . Canadel said this forecast of China's emissions has a large margin of error, so they may actually be stable or even declining. India's emissions have also slowed down from last year, increasing by just under 5%. In the US and EU, emissions continued to decline, albeit at a much slower pace than last year.

Increased demand for electricity to power air conditioners due to higher temperatures is also a key reason why fossil fuel emissions will continue to rise despite a massive build-up of renewable energy in 2024. He says: Neil Grant At the German think tank Climate Analytics. Whether it's from electric vehicles, data centers or manufacturing, “most people seem to be a little surprised by the level of electricity demand this year,” he says.

If emissions continue at this level, the world will exceed its carbon budget to limit warming to 1.5°C above pre-industrial levels within six years, and exceed its budget to limit warming to 2°C within 27 years, the report says. Pointed out. .

“We have to accelerate, accelerate, accelerate, accelerate the transition to renewable energy,” Candell said. “Climate change is like a slippery slope and we can keep falling. We need to slam on the brakes as hard as we can to avoid falling.”

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Source: www.newscientist.com

The Changing Debate on Fossil Fuels at COP28: Even if the Climate Summit Fails

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Climate change protester Risipriya Kangujam takes the stage during the COP28 debate on December 11th

Dominika Zarzycka/NurPhoto via Getty Image

The COP28 climate summit in Dubai, United Arab Emirates, has gone into extra time, with a real possibility that negotiations will fail given how far countries are separated on the future of oil, gas, and coal. It has become a target. But whatever the outcome, this summit changed the way the world talks about fossil fuels and climate change.

“The calculations are being made for fossil fuels,” he says. David Waskow at the World Resources Institute, an environmental nonprofit organization. “This has put the issue front and center and changed the conversation around it, and I hope that will continue to be the case.”

At the summit, and in the months leading up to it, many countries and many civil society organizations lobbied for strong language on phasing out fossil fuels in any deal reached in Dubai. The phasing out of fossil fuels received unexpected attention near the end of last year’s COP27 summit in Egypt, but the role of fossil fuels in driving climate change as a major source of greenhouse gas emissions has never been more important. There has never been a COP with such continuous focus.

“Even a year ago, the historic debate on phasing out fossil fuels currently taking place at COP28 was completely unthinkable,” he says. Jonas Kuehl At the International Institute for Sustainable Development, Canada. “The joint efforts of nearly 130 countries and civil society forced them into a process that has been fruitless for many years.”

The draft core agreement, published on December 11, drew heavy criticism from a number of countries and organizations yesterday for not mentioning the phasing out of fossil fuels. However, the draft does mention the need to reduce the production and use of fossil fuels and makes two other references to these fuels. This alone represents a significant change from past summits, which referred to emissions but not major sources.

“This is the first COP to actually include the word fossil fuels in a draft decision,” he said. Mohamed Addo At Powershift Africa, a Kenyan energy think tank. “This is the beginning of the end of the fossil fuel era.”

Summit participants are fundamentally divided on what should be included in the agreement. High-income Western countries, as well as small island states and some low-income countries such as Colombia and Kenya, are demanding stronger language on ending the use of fossil fuels to be part of the agreement. We are united. But countries that rely on oil and gas revenues, and those that consider fossil fuel development essential to future development, oppose disqualifying language.

“The United States, Canada, and Australia are all fossil fuel producers, but they are all perfectly aligned with European countries,” he says. Andrew Deutz At the Nature Conservancy. “This puts even more pressure on fossil fuel producing countries.”

Countries that oppose language phasing do so for a variety of reasons. For example, the Group of African States, while not totally opposed to such an agreement, recognizes that any agreement would have different responsibilities and timelines for phase-out, and that it is important for countries to implement energy transitions. It claims to provide support to do so.

“Asking Africa to phase out fossil fuels is like asking Africa to stop breathing without life support,” Nigeria’s Environment Minister Isiak Kunle Salako said at a press conference at the summit on December 12. African ministers also emphasized the need for further support. This is to adapt to the climate change that is already occurring.

Nigeria is part of a group of oil-exporting countries called OPEC, and its members, especially Saudi Arabia, have been the strongest opponents of the phase-out. But the overwhelming focus on fossil fuels means it may not matter in the long run.

“I think because of the pressure from oil and gas interests, if we don’t agree to phase out fossil fuels here, it’s likely to be a pyrrhic victory for them,” he said. bill hare At the think tank Climate Analytics. “They would have kept it going, but they wouldn’t have stopped it.”

A complete failure at COP28 could help build momentum towards an unjust end to the fossil fuel era, Hare says. “Next year we’ll probably see more countries wanting to phase out fossil fuels, more countries thinking about it more and putting more pressure on oil and gas producers.”

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Source: www.newscientist.com