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Aarti Holla-Maini, a British lawyer with a background in the satellite business, is the director of the UN's Office for Outer Space Affairs (Unoosa). She is responsible for alerting the UN secretary general if a large asteroid is on a possible collision course with Earth.On 27 December 2024, a robotic telescope in Chile spotted a distant rock, asteroid 2024 YR4, which was initially estimated to be the size of a small building. As the asteroid's impact probability increased, Holla-Maini's team drafted a letter to the UN secretary general, triggering the first global notification since the UN established a planetary defence collaboration in 2013.The asteroid's size and speed meant an impact could release energy comparable to hundreds of times the power of the Hiroshima bomb, potentially wiping out a city or region. The asteroid reached level three on the Torino Impact Hazard Scale, indicating a threat to human civilization.Holla-Maini's team worked with the International Asteroid Warning Network and other experts to track the asteroid. Although its impact probability peaked at more than 3% in February 2025, it has since dropped to a negligible level. The asteroid scare served as a useful test for Unoosa's role in planetary defence.Unoosa plays a critical role in registering satellites launched into Earth's orbit and acts as an informal 'hotline' for potential satellite collisions. Holla-Maini's small team of 35 employees punches well above its weight, managing a massive remit as governments and businesses increasingly operate in space.

The ongoing United States-Israeli conflict with Iran has triggered severe disruptions to global LNG supplies in the Gulf, creating the most significant energy market disruptions in recent years. The critical Strait of Hormuz, through which 27 percent of the world's maritime oil trade and 20 percent of LNG shipments pass, has been brought to a near standstill.In response to the conflict, oil-producing nations such as Saudi Arabia have rerouted oil through alternative pipelines, while Qatar has completely halted LNG production at its Ras Laffan and Mesaieed facilities following attacks on its energy infrastructure. This disruption comes as natural gas makes up about a quarter of global energy consumption, raising widespread concerns about the impact on nations heavily reliant on gas imports.Natural gas is formed over millions of years from decomposed organic matter subjected to intense heat and pressure beneath the Earth's surface. LNG represents natural gas that has been cooled to -162 degrees Celsius through cryogenic processing, shrinking it to a 600th of its gaseous volume. In its liquid state, LNG is colorless, odorless, and non-flammable, making it safe and efficient to transport across vast distances.Before liquefaction, the gas undergoes purification through water-based solvents and molecular sieve beds to remove impurities including carbon dioxide, hydrogen sulfide, water, and mercury. Heavier hydrocarbons are then separated from methane and ethane through fractionation. The resulting fuel is typically composed of 85 to 95 percent methane, with small amounts of ethane, propane, butane, and nitrogen.LNG is stored in large insulated tanks without requiring high-pressure infrastructure, then pumped onto double-hulled carriers for shipment to terminals worldwide. At destination facilities, LNG is heated using seawater or warm water baths until it vaporizes—a process known as regasification—before being distributed through pipelines for consumption.Once returned to a gaseous state, LNG serves multiple purposes globally. Residential applications include cooking, heating, and electricity generation, while supporting hot water systems in homes and heating for commercial buildings. In power generation, LNG offers a comparatively low-carbon alternative to coal and oil. Industrial applications span fertilizers, plastics, paints, and medicines, with LNG also used to fuel heavy-duty vehicles and ships.The disruption has particularly affected agricultural production, as Gulf nations export close to half the world's traded urea—a key fertilizer component. Natural gas serves as both the primary feedstock and fuel for fertilizer manufacturing, with the halt in production forcing producers across the region to suspend or reduce operations.While primarily valued as an energy source, LNG processing yields significant by-products with industrial and medical applications. The most notable is helium, extracted during cryogenic processing. With global helium production estimated at 180 million cubic meters annually, the disruption to Qatar's LNG facilities has removed approximately 5.2 million cubic meters from the market each month—accounting for about a third of global monthly production.Helium is critical for cooling superconducting magnets in MRI and CT scanners, with the average MRI machine requiring about 1,700 liters of liquid helium. The element is also vital to the data center industry, where it conducts heat away from silicon components, preventing damage to semiconductors. Additionally, the natural gas value chain generates petrochemical derivatives that serve as feedstock for manufactured goods, including medical-grade plastics.According to the International Gas Union's 2025 World LNG Report, 411.24 million tonnes of LNG were traded in 2024. The United States emerged as the largest exporter with 88.4 million tonnes, followed by Australia (81 million tonnes), Qatar (77.2 million tonnes), Russia (33.5 million tonnes), and Malaysia (27.7 million tonnes). Together, these top five suppliers account for more than three-quarters of global LNG supply.China was the largest importer with 78.6 million tonnes in 2024, followed by Japan (67.7 million tonnes), South Korea (47.1 million tonnes), India (26.1 million tonnes), and Taiwan (21.8 million tonnes). These top five importers constituted nearly 59 percent of all global LNG imports that year.South Asian nations face particularly severe risks from the current conflict. Pakistan, where natural gas accounts for 28 percent of electricity generation for its 250 million people, and Bangladesh, where gas supplies half of all electricity for its 176 million population, are heavily dependent on Gulf imports. Qatar and the United Arab Emirates supply approximately 99 percent of Pakistan's LNG imports and 72 percent of Bangladesh's.In response to the energy crisis, Pakistan has implemented emergency measures including a four-day workweek for government employees and extended school holidays. Bangladesh has reduced gas supplies and is seeking nearly $2 billion in international loans to fund energy inputs and maintain price stability. India, which relies on Gulf nations for about half of its LNG and generates 5 percent of its electricity from gas, has shifted toward coal usage as LNG disruptions continue.

A recent study conducted by researchers at Adelaide University has revealed that sperm in microgravity environments become disoriented and struggle to navigate through a simulated female reproductive tract. This finding has significant implications for the future of human reproduction in space, particularly as plans for lunar and Mars settlements gain momentum. The researchers used a machine to mimic microgravity, similar to the conditions experienced by astronauts on the International Space Station. They found that sperm tumble around like untethered astronauts, unable to determine their direction. This disorientation resulted in a 40% reduction in the number of microgravity-exposed human sperm that successfully navigated the maze compared to the control group. The study, published in the journal Communications Biology, highlights the challenges of reproduction in space. Dr. Nicole McPherson, the lead researcher, noted that understanding the effects of microgravity on sperm navigation is crucial for the success of future space missions. The study also found that adding progesterone helped overcome the sperm's disorientation, suggesting a potential solution for improving fertility in space. The research has broader implications for both space exploration and earthly reproductive science. As NASA's Artemis mission and private companies like SpaceX plan for human habitats on the moon and Mars, understanding the effects of microgravity on reproduction becomes increasingly important. The study's findings also contribute to the ongoing discussion about the feasibility of human settlements on Mars and the need for sustainable reproductive technologies. The Adelaide researchers collaborated with the university's Andy Thomas Centre for Space Resources to conduct the study. Their work builds on a history of research into reproduction in space, including NASA's 2018 mission to study the effects of weightlessness on human sperm. As space exploration advances, the need for further research into reproductive health in space becomes increasingly urgent.

The deadly conflict in Iran has precipitated what the International Energy Agency describes as the worst oil crisis in history, creating a complex situation for global clean energy efforts. While climate advocates are calling for accelerated transition away from fossil fuels, the war simultaneously presents both opportunities and significant challenges for renewable energy development.US-Israeli strikes on Iran have critically disrupted supply routes through the Strait of Hormuz, a maritime channel through which 20% of global oil flows. The conflict has also seen direct attacks on fossil fuel infrastructure by all parties involved, creating additional market shocks and uncertainty.Interestingly, reduced reliance on oil and gas is proving beneficial for some regions navigating the ongoing fuel crisis. As Jan Rosenow, a professor of energy at Oxford University, explains: Electricity generated from wind and solar is largely insulated from fossil fuel price volatility – once built, the fuel is free.Countries with substantial renewable energy investments are demonstrating greater resilience. Spain and Portugal have witnessed electricity prices decline in recent weeks, while Pakistan has experienced a surge in rooftop solar installations over the past five years, helping the nation weather oil and gas market disruptions.The electric vehicle revolution is also providing some economies with protection against gasoline price increases. In China, more than 50% of all new cars sold are electric, while in Nepal, that figure reaches an impressive 70%.However, the war is creating near-term challenges that could impede clean energy growth. The conflict has disrupted transport routes for metals essential in solar panel construction, particularly aluminum. The Middle East accounts for approximately 9% of global aluminum production, and regional producers have begun scaling back operations amid the hostilities.Furthermore, the inflationary pressures stemming from the conflict pose significant hurdles for renewable energy projects, which require substantial upfront investment for construction, equipment, and installation.Paradoxically, the war and resulting energy shocks have provided a short-term boon for fossil fuels, including coal. Many Asian countries heavily reliant on imported liquefied natural gas (LNG) are burning more coal to meet energy demand as LNG supplies through the Strait of Hormuz become constrained.The conflict has also incentivized increased oil and gas drilling and exploration, as countries scramble to replace disrupted LNG supplies and higher prices make previously unviable projects economically viable. US company Venture Global recently announced a new five-year contract to supply LNG, while Canadian energy company TC Energy indicated that Iran war disruptions are increasing the likelihood of expanding a massive LNG export facility.The Trump administration has further incentivized oil expansion, recently announcing plans to pay a French company $1 billion to abandon offshore wind farm projects in favor of fossil fuel initiatives.Experts propose various policy responses to encourage the green transition during this crisis. Rosenow advocates for tax reform to reduce the disproportionate burden on electricity compared to gas. Professor Gregor Semieniuk suggests imposing windfall taxes on oil and gas companies during the war, while Lauren Pagel of Earthworks calls for ending fossil fuel subsidies and making polluters pay for their environmental impact.Despite the current challenges, Kingsmill Bond, a strategist for the energy thinktank Ember, maintains that this crisis could ultimately accelerate the clean energy transition: This is the first oil shock in history where oil faces a superior alternative. Solar, wind and EV are cheaper, local, faster to deploy, and huge.

Rob Petit's documentary Underland, inspired by Robert Macfarlane's bestselling book, delves into the mysterious world beneath the Earth's surface. The film features Mexican archaeologist Fátima Tec Pool exploring cenotes on the Yucatan peninsula, theoretical physicist Mariangela Lisanti studying dark matter in an ultra-clean facility in Canada, and urban explorer Bradley Garrett navigating storm-drain tunnels in Las Vegas.The documentary intertwines these experiences with Sandra Hüller reading poetic prose about the 'nether' in a faintly Americanised accent. While the film raises intriguing ideas, it sometimes struggles to reconcile natural underground spaces with human-made ones. The most striking scenes showcase Lisanti's work searching for dark matter, highlighting the vastness of deep time and the potentially fruitless pursuit of scientific discovery.The film is set to release in UK and Irish cinemas on 27 March, offering viewers a chance to explore the hidden world beneath their feet.

Australia and the European Union have sealed a landmark trade agreement, eliminating tariffs on almost all Australian critical mineral exports. This move is part of a broader strategy to mitigate concerns over China's dominant position in the global rare earths market. The deal, which took eight years to finalize, signifies a significant step towards strengthening economic ties between the EU and Australia. European Commission President Ursula von der Leyen emphasized that the agreement would help reduce dependency on any single supplier for crucial minerals, highlighting the strategic importance of this partnership. The agreement will not only facilitate the export of critical minerals from Australia to the EU but also remove over 99 percent of tariffs on EU goods exports to Australia. This is expected to result in a substantial reduction of approximately 1 billion euros ($1.2 billion) in annual duties for EU companies. Consequently, EU exports to Australia are projected to grow by up to 33 percent over the next decade. Australian Prime Minister Anthony Albanese noted that the deal is worth approximately 10 billion Australian dollars ($7 billion) annually to the Australian economy. The agreement underscores the importance of diversifying supply chains and reducing reliance on China, which currently controls about 90 percent of the global processing for rare earths. These minerals are vital for producing technological equipment such as electric cars, lithium-ion batteries, and LED televisions. The trade relationship between the EU and Australia is substantial, with EU firms exporting 37 billion euros ($43 billion) worth of goods to Australia in 2025 and 28 billion euros ($33 billion) in services in 2023. The EU was Australia's third-largest two-way trading partner and second-largest source of foreign investment in 2024.

The concept of joules, named after Victorian-era physicist James Prescott Joule, has evolved significantly over time. From a simple unit to describe the effort required to pick an apple off the floor, it has grown to encompass larger units such as kilojoules, megajoules, gigajoules, terajoules, petajoules, exajoules, and now zettajoules. However, humanity's increasing energy consumption and its impact on the planet's energy balance have far outpaced our understanding and management of these growing energy levels.

Moby, the renowned musician, has shared his honest playlist, offering a glimpse into his personal music preferences. He recalls the first song he fell in love with, 'I Fought the Law' by the Clash, which he would record on an old Dictaphone and listen to repeatedly.Moby also shares the first single he bought, 'Convoy' by CW McCall, which he played 40 times in a row, raising concerns for his mother about his future as a musician and addict.He takes pride in never doing the same karaoke song twice, with notable attempts at 'My Way' by Frank Sinatra and 'In Da Club' by 50 Cent. Moby also reveals the song he inexplicably knows every lyric to, 'I Know You Got Soul' by Eric B & Rakim, which he played 8,000 times while DJing in the 80s.Moby discusses the best song to play at a party, 'Been Caught Stealing' by Jane's Addiction, which surprised a crowd of 15 people at a house party in 1989. He also shares the song he can no longer listen to, 'Lola' by the Kinks, due to its gross and transphobic lyrics.Moby confesses to secretly liking 'My Heart Will Go On' by Céline Dion, a song he thought he'd never admit to enjoying. He also shares the best song to have sex to, '4′33″' by John Cage, and the song that changed his life, 'I Feel Love' by Donna Summer.Other songs on Moby's playlist include the song that makes him cry, 'Vincent' by Don McLean, and the song that gets him up in the morning, 'Not to Touch the Earth' by the Doors. He concludes by sharing the song he'd like played in his funeral, 'Last Night' from his 2008 album of the same name.

A meteorite event occurred over Ohio on Tuesday morning, producing a significant sonic boom that was felt across a wide area, including parts of Pennsylvania. According to NASA, the meteorite entered Earth's atmosphere at approximately 9 am local time. The meteorite, described as a small asteroid about 2 meters in diameter and weighing around 6 tons, moved at a speed of 45,000 mph. This event caused widespread reports of a loud boom, with residents in Cleveland and as far east as Pittsburgh, Pennsylvania, and into New York state, describing the sound as similar to fireworks or thunder. NASA's meteoroid environment office confirmed that the asteroid was spotted near Medina, Ohio. Despite its relatively small size, the meteorite produced a considerable sonic boom, which was captured on video by a National Weather Service (NWS) employee in Pittsburgh. The NWS's Cleveland office confirmed that satellite data suggested the boom was caused by a meteorite. So far, there have been no reports of debris being found, although it's possible that small fragments may have fallen to Earth. NASA noted that about 17,000 meteorites fall to Earth annually, but most burn up in the atmosphere. The agency also stated that space rocks smaller than a football field typically break apart in Earth's atmosphere, although they can occasionally explode in mid-air.