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In a groundbreaking experiment conducted in Colorado's Rocky Mountain meadows, scientists heated a patch of land by 2C for 29 years. The results are alarming: the area transformed from a lush, diverse grassland into a desert-like scrubland dominated by sagebrush. This 'shrubification' process, driven by rising temperatures, threatens the very existence of alpine grasslands worldwide.The experiment, conducted at the Rocky Mountain Biological Laboratory, involved warming five plots of 30 sq meters each by 2C using electric infrared radiators. The results showed a 150% increase in shrubs in warmed plots compared to those without heating. The surface soil dried by up to 20%, and shallow-rooted plants became stressed, leading to the extinction of some wildflowers.The implications extend far beyond Colorado. Alpine grasslands, which host 50% of European flora on just 3% of land, are particularly vulnerable. As temperatures rise, these ecosystems are likely to be irrevocably changed, leading to a loss of biodiversity. The phenomenon of 'shrubification' is not limited to mountain environments; it's also observed in Arctic landscapes, where shrub cover expanded by 2.2% each decade between 1984 and 2020.Conservation ecologists warn that while shrubs and trees bring benefits like shelter and carbon sequestration, their rapid expansion in cold environments is a symptom of climate change. The speed and scale of these changes are concerning, with potential knock-on impacts on the carbon cycle and ecosystem balance.As Lara Souza, lead researcher, notes, 'It's like flowers on steroids.' However, this vision of abundance is tinged with sadness at the prospect of irreversible changes to fragile landscapes. The future of these ecosystems, and many others like them, hangs in the balance as global temperatures continue to rise.

The Gran Chaco forest in Argentina, spanning across parts of Argentina, Bolivia, Paraguay, and Brazil, is facing a critical threat from deforestation. Small farmers, enticed by the promise of quick money from selling timber, often contribute to this environmental degradation. However, a collaborative effort between conservationists, NGOs, and international organizations is underway to support small-scale landowners and Indigenous communities in establishing alternative income sources. This initiative aims to enable them to resist the pressures of agribusiness and the timber market. Jorge Luna, a 55-year-old farmer, has taken a significant step towards preserving his 40-hectare land in Chaco province. He rejected an offer to cut down the trees and instead embarked on a second career as a forest tourist guide with Fundación Rewilding Argentina, a non-profit organization working to restore parts of the Gran Chaco forest. Luna now rents out a small campsite to visitors and takes tourists on kayak tours along the Bermejito River. "At first, you didn’t give the plants value. It was a lack of knowledge of what they meant. Now, every leaf that sprouts has an added value," he says. Created in 2010 by Tompkins Conservation, Rewilding aims to protect vast tracts of territory and create economic opportunities for local communities while preserving the biosphere. The organization worked with 15 other organizations to convince the government of Chaco province to turn 128,000 hectares into the El Impenetrable national park, officially designated in 2014. Since then, Rewilding has established a network to support a budding tourism industry. It offers riverside glamping stays while promoting local and ancestral knowledge as possible sources of income. Women have returned to weaving and artisanal production, as well as providing home-cooked meals for visitors. According to Greenpeace, Argentina lost nearly 7 million hectares of native forest between 1998 and 2024, with most of it in the Gran Chaco. An estimated almost 120,000 hectares of forest were lost in northern Argentina in 2024, a 10% increase from the previous year. The primary causes of forest loss are the expansion of agriculture, mainly for intensive cattle ranching and genetically modified soya, and forest fires. The Gran Chaco forest also feeds the timber industry, particularly with the quebracho tree, which produces a tannin used in leather products, and carob trees. Environmental lawyers warn that the Gran Chaco could disappear within two decades if deforestation continues at its current pace. "The Chaco does not receive the same attention as the Amazon – few people even know it exists," says Enrique Viale, an Argentine environmental lawyer and activist. For conservation efforts to succeed, projects must be co-designed with the community, ensuring their long-term objectives are considered. Community empowerment, equal distribution of benefits, and capacity building are crucial factors. Mabel Figueroa, a local weaver, has resumed her craft since the national park opened, selling scarves, blankets, and ponchos to tourists. She raises sheep and dyes their wool with tree bark and forest plants, reviving an ancestral tradition.

A recent Australian Senate inquiry has concluded that the country's climate change and energy 'information ecosystem' is fuelling conflict in communities, with misinformation and disinformation confusing the public, slowing renewable energy projects, and undermining policy responses to the climate crisis.The inquiry's final report, released on Tuesday evening, recommended that the government do more to make tech companies liable for 'psychosocial harms' spread on their platforms. It also suggested strengthening media literacy through the national curriculum and greater oversight when corporations engage with classrooms.The committee recommended more funding for research into mis- and disinformation, with a funding model to be developed for an independent effort to 'track hidden digital influence systems'. The Australian government should also sign a UN declaration, launched in Brazil in 2025, promising a series of actions aimed at combating climate mis- and dis-information.The use of artificial intelligence by groups looking to block progress on climate change was likely to further threaten the integrity of information the public received, the inquiry heard. The committee's Greens and Labor members endorsed the report, but some members felt it did not go far enough in addressing the issue.The inquiry's findings have significant implications for Australia's renewable energy future and its ability to address the climate crisis. As climate disinformation continues to evolve into a national security challenge, the Australian government must take urgent action to protect the integrity of information and promote a safe climate future.

Israel's parliament has moved closer to implementing a contentious death penalty for Palestinians convicted of terrorism, with the Knesset's national security committee approving the measure on Tuesday. The bill, initiated by the far-right Otzma Yehudit party, now heads to its final vote.Critics, including human rights groups and UN experts, have strongly opposed the bill, citing concerns it violates international law and discriminates against Palestinians. The proposed law would allow for executions to be carried out within 90 days of sentencing, with hanging as the specified method.The bill also proposes that those sentenced to death be held in a separate facility with restricted visitation rights. Executions would be carried out without the option for clemency, a provision that has drawn sharp criticism from opponents.International condemnation has been swift, with UN experts urging Israel to withdraw the bill, stating it would violate the right to life and constitute cruel, inhuman, or degrading punishment. The European Union's diplomatic service has also condemned the bill, emphasizing that the death penalty is a violation of the right to life.In Israel, the bill has been backed by National Security Minister Itamar Ben-Gvir, who has worn a noose-shaped lapel pin in support of the measure. However, notable opposition has come from within Israel, including from centre-left lawmaker Gilad Kariv, who has raised concerns about the bill's moral and legal implications.

The traditional cold war diplomacy of brinkmanship, characterized by carefully balanced standoffs and rules-based international order, has given way to a world in freefall. This shift is exemplified by the ever-widening conflict in the Gulf where strategic objectives remain as unclear as the potential endpoint of hostilities.Approaching a month since the United States and Israel launched attacks on Iran, the stated objectives of removing the country's nuclear threat and destroying its ballistic missile capability appear increasingly disconnected from the disproportionate impact on civilians and neighboring Gulf nations. Despite these consequences, the Iranian regime's willingness to escalate the conflict shows no signs of diminishing.The Guardian Weekly's coverage examines this critical juncture through multiple perspectives. Patrick Wintour recounts the pivotal week when global tensions reached a tipping point, while Richard Partington analyzes the long-term economic implications of a prolonged conflict, from oil price fluctuations to inflationary pressures and economic growth impacts. From South Lebanon, William Christou reports on healthcare professionals caught in the crossfire of Israeli airstrikes, highlighting the human cost of the escalating violence.Emma Graham-Harrison provides insight from Jerusalem, examining Israeli Prime Minister Benjamin Netanyahu's strategy of attempting to rehabilitate his image through what he frames as destruction of an 'axis of evil.' Meanwhile, Simon Tisdall poses a critical question: when US President Donald Trump eventually seeks to halt the conflict, will any parties be willing to heed his calls for de-escalation?Beyond the primary geopolitical focus, this week's Guardian Weekly edition explores several significant developments across different sectors. The UK political landscape features an examination of the upcoming local elections, where voter sentiment appears increasingly focused on rejecting established parties rather than actively supporting alternatives. The scientific section explores innovative approaches to addressing snoring disorders through CPAP machines, while the culture section features an in-depth interview with Dave Grohl discussing Foo Fighters, personal challenges, and grief following the loss of bandmate Taylor Hawkins.In sports, the publication celebrates the remarkable achievement of British athletes Keely Hodgkinson, Georgia Hunter Bell, and Molly Caudery, who each secured gold medals at the world indoor athletics championships in Poland, showcasing British excellence in track and field events.

Australian swimmer Cameron McEvoy has achieved a lifelong dream by breaking the 50m freestyle world record with a time of 20.88 seconds at the China Open. The Queenslander shattered the longstanding record by three hundredths of a second, a mark set during the era of now-banned super-suits.The 31-year-old athlete expressed his surprise and delight at achieving this milestone ahead of schedule. "That was more of a target for the end of this season, so to have hit it at the moment in March is really special," McEvoy stated upon returning to Brisbane.McEvoy's journey to swimming's pinnacle has been unconventional. Having made his Olympic debut in London as a teenager in 2012, he won bronze medals in relays in Rio and Tokyo before securing his first individual Olympic gold in Paris in 2024 at age 30—well past the typical peak age for elite sprinters.His remarkable rise to dominance stems from a radical rethinking of his training methodology. McEvoy abandoned traditional long pool sessions in favor of strength training and short, explosive sets that mimic the specific requirements of the 50m event. This year, he took an even more extreme approach."I had an off-season which was mainly strength development, and I've barely done much swimming since the [August] World Champs last year, up until this comp," McEvoy explained. "And then this comp was meant to be the transition door into going into more of a sprint-focused regime, but because I got the world record and I've made steps, the idea is just to double down on this and not change it, see how far this can actually take me."The previous world record-holder, César Cielo, congratulated the Australian on his "incredible" swim, sharing a profound insight: "You never change things by fighting the existing reality. To change something, build a new model that makes the existing model obsolete."McEvoy's innovative approach has resonated beyond his own achievements. He receives weekly messages from both elite athletes and former swimmers who have returned to the sport inspired by his methods. "The amount of them that are saying that they're doing lifetime best times and they're deep into their 40s, compared to when they were training full-time in their teens, it's pretty incredible," he noted.Looking ahead, the Australian swimmer has set his sights on future Olympic Games. "I've still got my eyes on LA, I definitely have my eyes on the home Games here in Brisbane, and so I'll just keep at it every year and just take it one step at a time," McEvoy stated, emphasizing his commitment to continue pushing boundaries with his unique training philosophy.

The Arm AGI CPU: A New Era of In-House SiliconFor the first time in its 35-year history, Arm Holdings is stepping out from behind the licensing model to manufacture its own silicon. The company revealed the Arm AGI CPU at an event in San Francisco, a production-ready processor designed specifically for AI inference in data centers. Unlike its traditional business model of licensing designs to giants like Nvidia and Apple, Arm has developed this chip using its own Arm Neoverse family of CPU IP cores.This strategic pivot is backed by a robust ecosystem of launch partners, including Meta, which is the chip's first customer. Other key partners include OpenAI, Cerebras, and Cloudflare. The chip is already ready for order, signaling that Arm is moving aggressively to capture value in the booming AI infrastructure market.The Critical Role of CPUs in AI InfrastructureWhile GPUs have dominated headlines for training large language models, Arm is highlighting the often-overlooked importance of the central processing unit (CPU) in modern AI racks. Arm argues that the CPU is the pacing element of modern infrastructure, responsible for managing thousands of distributed tasks, including memory allocation, storage scheduling, and data movement across systems.Infrastructure Management: CPUs ensure that distributed AI systems operate efficiently at scale.Market Constraints: The demand for high-performance computing is exacerbating global supply chain issues, with Intel and AMD recently informing Chinese customers of extended wait times due to CPU shortages.Cost Implications: These supply constraints are contributing to rising prices for computer hardware.Breaking the Licensing Model: A Strategic Bet on CompetitionThe release of the Arm AGI CPU represents a historic deviation from the company's founding principles. For decades, Arm has operated as a pure-play design licensor, allowing partners to manufacture chips based on its architecture. However, the company is now poised to compete directly with many of its biggest customers.Majority-owned by the Japanese conglomerate SoftBank Group, Arm's move suggests a desire to capture more of the value chain. By building its own silicon, Arm can offer a more integrated solution for AI workloads, potentially undercutting or complementing the offerings of its licensees. This shift challenges the traditional semiconductor ecosystem and sets a precedent for other IP licensor to consider building their own hardware.The Future of Chip Architecture in the AI RaceArm's entry into manufacturing signals a new phase in the AI chip wars. As the industry moves toward specialized silicon for inference, the line between design houses and manufacturers is blurring. We can expect to see more IP licensor developing their own chips to ensure they have control over the performance and efficiency of the hardware powering the next generation of AI models.

Amazon's cloud computing unit, Amazon Web Services (AWS), has confirmed that its region in Bahrain was disrupted due to drone activity. This incident marks the second time in a month that the company's operations have been affected by the war in the Middle East.An Amazon spokesperson confirmed the disruption, stating that the company is helping customers migrate to alternate AWS regions while it recovers from the incident. However, the company did not provide additional details on the extent of the damage or the expected duration of the disruption.The disruption comes after Iran's Islamic Revolutionary Guard Corps (IRGC) threatened to attack 'economic centres and banks' related to US and Israeli entities in the region. The IRGC-affiliated Tasnim news agency released a list of offices and infrastructure run by top US companies with Israeli links, including Google, Microsoft, and Oracle, which have branches in multiple Israeli cities and Gulf countries.AWS is critical for the operation of many well-known websites and government operations and is Amazon's main driver of profits. Earlier this month, AWS reported that facilities in Bahrain and the United Arab Emirates had lost power, and the company was working to transfer computing workloads to other regions.These attacks come after Iran claimed it is targeting US assets across the Gulf Arab states in retaliation for the joint attack on Iran by the US and Israel that began on February 28. Gulf states have accused Tehran of targeting civilian infrastructure, such as airports and energy facilities.

Hong Kong police have been granted the authority to require individuals suspected of violating the city's national security law to provide passwords to their mobile phones or computers. This measure, which took effect on Monday, is part of the national security law imposed by Beijing in 2020. The new provisions empower police to require a person under investigation suspected of endangering national security to provide any password or decryption method for electronic devices and to provide the police “any reasonable and necessary information or assistance”. Refusing to comply could lead to up to one year’s imprisonment and a fine of up to 100,000 Hong Kong dollars ($12,768), while providing false or misleading information could bring up to three years’ imprisonment and a fine of up to 500,000 Hong Kong dollars ($63,840). The imposition of the 2020 national security law, supplemented by a second component in 2024, has led to a marked decline in civil liberties in the former British colony returned to China in 1997, according to human rights advocates. The new amendments have sparked concerns over the erosion of Hong Kong's autonomy and its status as an international financial and business centre. Urania Chiu, a law lecturer in the UK researching Hong Kong, said the new provisions interfered with fundamental liberties, including the privacy of communication and the right to a fair trial. “The sweeping powers given to law enforcement officers without any need for judicial authorisation are grossly disproportionate to any legitimate aim the bylaw purports to achieve,” Chiu told the Reuters news agency. A Hong Kong government spokesperson said the amended rules conform to the city’s mini-constitution, the Basic Law, and its human rights provisions, and “will not affect the lives of the general public or the normal operation of institutions and organisations”. According to the Security Bureau, a total of 386 people have been arrested for national security crimes so far, with 176 people and four companies convicted.