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The United States military confirmed that, beginning at 10 a.m. Eastern Time (14:00 GMT) on April 13, all maritime traffic entering or leaving Iranian ports will be blocked. The directive, issued by U.S. Central Command (CENTCOM), targets vessels of every nation operating in the Gulf and the Gulf of Oman, but explicitly excludes ships merely transiting the Strait of Hormuz to non‑Iranian ports, marking a narrower scope than former President Donald Trump’s broader strait‑wide threat. This decisive action follows the abrupt end of marathon peace talks in Islamabad, where negotiators failed to secure a memorandum of understanding with Tehran. The stalemate has revived fears of renewed hostilities, prompting the U.S. to leverage maritime pressure as a bargaining chip. Financial markets reacted sharply: U.S. crude oil prices surged 8 % to $104.24 per barrel, while the benchmark Brent crude rose 7 % to $102.29. The spikes reflect investor anxiety over potential disruptions to the flow of oil and liquefied natural gas that currently passes through the Strait of Hormuz, a chokepoint responsible for roughly one‑fifth of global energy shipments. Since the February 28 launch of a joint U.S.–Israel operation against Iran, the strait’s traffic has dwindled to a trickle. Iran continues to navigate its own vessels and has allowed limited passage for foreign ships, while discussing a post‑conflict toll system for the waterway. In response to the blockade threat, Iran’s Islamic Revolutionary Guard Corps warned that any U.S. warship attempting to enforce the measure would breach the existing U.S.–Iran ceasefire—set to expire on April 22—and would be "dealt with severely." Iranian Foreign Minister Abbas Araghchi blamed the United States for the diplomatic failure, accusing U.S. negotiators of "shifting the goalposts" when a deal was "just inches away." Academic commentary echoed regional concerns. Zohreh Kharazmi, an associate professor at the University of Tehran, asserted that the United States "is not in a position to dictate" Iranian maritime movements and warned that a prolonged standoff would quickly reveal which side—"the resilience of the Islamic Republic or the resilience of global markets"—would suffer first. While the blockade targets Iranian ports, CENTCOM emphasized that it will not impede freedom of navigation for vessels merely passing through the Strait of Hormuz, a subtle but significant concession aimed at avoiding a full‑scale maritime confrontation.

The ongoing conflict between the US and Iran has taken a turn for the worse, with President Trump's decision to escalate rather than negotiate turning this into a global problem. Europe, which had initially adopted a stance of non-involvement, is now facing the consequences of Trump's actions. The US naval blockade of Iran aims to prevent the country from shipping oil to market unless it allows free passage through the Strait of Hormuz. However, this move has caused oil prices to rise and stocks to fall, with the global economy feeling the pinch. The International Monetary Fund (IMF) meeting in Washington has turned into a crisis summit, with global growth forecasts being revised down due to the expected prolonged energy shock. The conflict has also raised concerns about shortages of essential goods such as medicines, fertilizers, and helium, which could have far-reaching consequences for the global economy. The article suggests that Trump's threats to stop tankers reaching Iranian ports and seize any ship paying Iran a toll for safe passage risk spiraling the war out of control. In this context, former UK Prime Minister Boris Johnson's suggestion that Europe should help the US get out of the mess it has created has some merit. The article argues that Europe needs to find a way to help Trump retreat without losing face, and that diplomacy and negotiation are crucial to resolving the crisis. The article concludes that Trump's war aims are unpredictable and that the US needs NATO's diplomats and ideas to resolve the crisis, rather than just brute force. Europe must find a way to work with the US to end the conflict and prevent further economic damage.

Tanya Khovanova has long been a leading voice in the world of recreational mathematics, authoring a popular blog and running the Number Gossip site where enthusiasts can inquire about any number.She now debuts her first book, Mathematical Puzzles and Curiosities, co‑written with fellow puzzle‑enthusiasts Ivo David and Yogev Shpilman. Published by World Scientific, the volume offers fresh challenges and inventive twists on classic problems.To give readers a taste, Khovanova selected three puzzles for the Guardian column:1. Battleships – As a naval admiral you must choose between sending a single vessel with a success probability of P % or two vessels each with a P/2 % chance, where the mission succeeds if at least one ship does. Which strategy maximises the odds?2. The Two Oracles – You face two respondents, Randie, who answers randomly, and Rando, who randomly decides to tell the truth or lie before each answer. Is there a method to distinguish them?3. Bad Maths – A student computes 5548 − 5489 as 59, claiming the “548” cancels out. He then experiments with a subtraction of the form XXYZ − XYZW (distinct digits) and observes the result is XW. How many digits in the new expression match those in the original calculation?Solutions to the trio were later posted online (update), but readers were urged to avoid spoilers until the scheduled reveal.Khovanova also reminds fans that she has been curating puzzles for the Guardian every other Monday since 2015 and welcomes new submissions via email.

At 19,000 miles above the lunar surface, the Artemis II astronauts heard the voice of Apollo‑13 commander Jim Lovell greeting them from beyond the grave, a message recorded shortly before his death at 97. Mission control transmitted the tribute on the morning of 6 April, when astronaut Reid Wiseman held a silk square bearing the original Apollo 8 patch—handed to him by Lovell’s son—before the crew’s launch. Launch director Charlie Blackwell‑Thompson secured a unanimous "go" from every console, a moment the author describes as a snapshot of humanity’s capacity to honor the past while reaching for the future. The ceremony stood in stark contrast to the Pentagon’s agenda. Two decades after a 2006 Iraqi kill‑board note reading “Let the bodies hit the floor,” the current defense chief pledged “death and destruction from the sky all day long” against Iran, a stance legal scholars warn could constitute a war crime. That rhetoric accompanies a proposed $1.5 trillion defense budget, including an additional $200 billion earmarked for operations against Iran—figures that dwarf NASA’s entire annual budget of $24.4 billion. Amid this fiscal disparity, crew members reflected on their place in history. Victor Glover, the first Black astronaut to travel deep space, described the view of Earth as an "oasis" in the void, while Christina Koch, the first woman to orbit the Moon, pressed her face to the window and formed a heart with her hands, calling the mission’s spirit "humility." Reid Wiseman watched the planet rotate beneath him, noting the sight of Africa, Europe, and the aurora‑lit north, saying it "paused all four of us in our tracks." Canadian astronaut Jeremy Hansen broke Jim Lovell’s 56‑year distance record and asked mission control to name a lunar feature after his late wife, Carroll. The crew agreed, designating a bright spot on the Moon as "Carroll," a tribute that will endure beyond any single lifetime. When Koch announced the spacecraft’s descent, she radioed, "We are now falling to the moon rather than rising away from Earth," a poetic reversal that underscored the mission’s symbolic return. The article recalls the author’s 2022 reflection on the James Webb Space Telescope, noting how humanity’s finest inventions now aim outward, seeking answers to our origins rather than turning inward toward conflict. Artemis II’s vessel, named Integrity, carried four breathing humans who, in a moment of collective grief, pressed their faces to the glass and imagined the faces of every loved one ever lived, captured in a single frame. Beyond the spacecraft, cultural threads wove through the mission: Hansen’s patch displayed the Seven Sacred Teachings of the Anishinaabe people, and the Chinese myth of Chang’e reminded viewers of the Moon’s timeless allure. As Carl Sagan famously wrote, "We are made of star‑stuff," the Artemis crew embodied that sentiment—not as passive observers, but as active participants in a fragile, hopeful narrative that rises above the relentless tally of bodies on Earth’s battlefields.

World champion boxer Terence Crawford was found guilty of careless driving on Monday and ordered to pay a $75 fine stemming from a traffic stop last year that led to a gunpoint incident. The incident occurred on September 28, hours after Crawford's hometown of Omaha held a parade to celebrate his unanimous-decision victory over Canelo Álvarez in a super middleweight championship fight.Crawford was stopped by police after officers observed his vehicle driving recklessly. During the stop, Crawford's head of security informed an officer that he was carrying a legal firearm, and seconds later, another officer spotted a gun on the floorboard. With guns drawn, officers ordered everyone out of the vehicle. Crawford claimed he had leaned over to tell the officer that he also had a legal firearm, but the officer didn't hear him. Police confirmed that all occupants of the vehicle were legally permitted to carry firearms.The traffic stop led to an internal investigation by the Omaha police chief into the officers' actions, which was found to have been lawful. In addition to the $75 fine, Crawford was ordered to pay $49 in court costs. This incident comes after Crawford announced his retirement in December with a 42-0 record and 31 knockouts, making him the first male boxer to capture three unified division titles.

Meta, the company behind Facebook and Instagram, is reportedly working on an AI version of its CEO, Mark Zuckerberg. This AI clone is being trained on Zuckerberg's mannerisms, tone, and public statements to allow employees to interact with a digital version of their boss.The rationale behind this project is to make Meta's 79,000 employees feel more connected to one of the most influential figures in Silicon Valley. The AI character will be developed using images and the voice of Zuckerberg, with the CEO reportedly taking part in the training process.This move is part of Meta's broader effort to integrate AI into its business operations. The company aims to use AI to lower costs and accelerate work pace. Zuckerberg has emphasized the importance of efficiency, stating that the goal is to 'get more done' by elevating individual contributors and flattening teams.The development of this AI character follows Meta's previous experiments with digital avatars. In 2022, Zuckerberg shared his own avatar in the metaverse, which received public criticism for its graphic quality. The company has since scaled back its metaverse vision, focusing on AI-generated 3D characters for everyday conversations.Meta's investment in AI is part of a larger strategy to remain competitive with tech rivals. The company is pouring billions of dollars into AI research to create 'superintelligence,' a system capable of performing any cognitive task far better than a human.

Rory McIlroy, the world's No 2 golfer, secured his second Masters win at Augusta National, a triumph he largely attributes to the support of his parents, Rosie and Gerry McIlroy. In a heartwarming display of family devotion, McIlroy had to convince his parents to attend the tournament, as they feared their presence might jinx his title defense. The McIlroy family has a remarkable story of sacrifice and dedication. Rory's parents worked multiple jobs, including graveyard shifts, to support their son's golfing ambitions. Gerry, 66, managed a bar and worked as a cleaner, while Rosie, 65, worked late nights at a factory. Their unwavering support and refusal to pressure Rory into playing golf have been instrumental in his success. During his final round, McIlroy admitted to thinking about his parents and fighting back tears. After securing his win, he turned to his family, including his wife Erica and daughter Poppy, and expressed his gratitude to his parents. 'Mum and Dad, I owe everything to you. You’re the most wonderful parents,' he said, visibly emotional. This victory cements McIlroy's stature as one of golfing's greats, with his sixth major win. His parents' presence at the tournament made the moment even more special, with Rosie sporting a handbag adorned with newspaper reports from his 2025 win. As McIlroy looks to the future, he hopes to emulate his parents' example, stating, 'If I can be half the parent to Poppy as you were to me then I’ll know I’ve done a good job.'

Justin Rose secured a joint‑third place at the 2026 Masters, ending the tournament two shots behind defending champion Rory McIlroy. The result marked Rose’s third top‑six finish in his last eight major appearances. After a heartbreaking playoff loss to McIlroy at Augusta in 2025, Rose entered Sunday’s final round with the lead on the back‑nine but ultimately carded a final‑round 70 following a stumble at the famed Amen Corner. Reflecting on his performance, Rose said, "In the last two years I’ve really re‑kicked and re‑energised my career. I now have a lot of belief that there’s plenty of runway ahead." The 45‑year‑old, who claimed a PGA Tour victory in February, believes his recent form positions him to compete for future major titles. Rose emphasized that the majors are the events that drive his preparation: "These are the tournaments I focus on, the ones that make me put in that extra mile to show up and stay in these great arenas." His record at Augusta is notable, with eight top‑10 finishes and two runner‑up finishes, underscoring his affinity for the course. Rose cited veterans such as Freddie Couples and Bernhard Langer as inspirations, noting that the layout of Augusta rewards deep course knowledge and a personal playing style. Englishman Tyrrell Hatton also made headlines, posting a spectacular final‑round 66 that included six birdies and an eagle, propelling him to a joint‑third finish – his best performance in a major to date. Hatton explained his approach: "I try not to treat majors any differently – I go out every day, every round, every shot, and give it my best. I’m looking at ways to fine‑tune my preparation, perhaps more putting early in the week, to feel even more ready." Now in his tenth Masters, Hatton highlighted his steady improvement, citing recent top‑10 finishes at the U.S. Open and a rise from a tied‑fourteenth to a tied‑ninth in the last three years at Augusta.

Experts are closely monitoring climate patterns in the Pacific Ocean, which indicate a high chance of El Niño developing this summer. A strong El Niño event could lead to severe weather conditions, including super-charged rainstorms and droughts, depending on the region. A 'super El Niño' could push 2027 to break global heat records, according to climate scientists. This phenomenon occurs when ocean surface temperatures in the central and eastern tropical Pacific Ocean warm up, leading to significant impacts on global weather patterns. El Niño is characterized by warming of the ocean surface in the central and eastern tropical Pacific Ocean. It's one of three states scientists observe: La Niña, conversely, happens when sea surface temperatures are below average, and neutral conditions are defined when neither El Niño or La Niña are present and surface temperatures are about average. The 'El Niño-southern oscillation' (Enso) tends to develop during spring in the northern hemisphere and shifts every three to seven years. Warming and cooling at sea surface during El Niño and La Niña can range from 1C to 3C, and have enormous effects on precipitation, drought, heat, and climate disasters in different regions. Conditions are currently shifting from La Niña to a neutral pattern, according to the latest outlook from the US Climate Prediction Center. Models show a 62% chance El Niño will emerge this summer and linger until at least the end of the year. A super El Niño that occurred in 2015 brought severe drought in Ethiopia, water supply shortages in Puerto Rico, and smashed records after unleashing a vicious hurricane season in the central North Pacific. A 'super' El Niño means one that is stronger, typically defined by sea surface temperatures spiking up to at least 2C. Noaa scientists have given a 1 in 4 chance that this could happen by fall or winter, with the caveat that spring forecasts are sometimes muddled. Transitions in conditions that happen in the spring can make outcomes a bit harder to predict. Experts warn that a strong or super El Niño could lead to drought and heat across Australia, southern and central Africa, India, and parts of South America. Heavy precipitation, meanwhile, could hit the southern tier of the US, parts of the Middle East, and south-central Asia.