London's Heathrow Airport experienced a complete shutdown due to a major power outage on March 20, 2025. All flights were grounded, impacting both arrivals and departures. The outage caused significant disruption, with thousands of passengers stranded and flights diverted to other airports. Airport authorities worked to restore power and resume operations as quickly as possible, but the incident's cause remained under investigation.
Ruth Belville, known as the "Greenwich Time Lady," carried on her father's unique business of selling the precise time to Londoners from 1892 to 1940. She would synchronize her pocket watch, nicknamed "Arnold," to the Greenwich Mean Time clock at the Royal Observatory and then visit her clients, mostly jewelers and businesses, charging them a small fee for the accurate time. Though the advent of radio time signals presented competition, Belville continued her service, valued for her reliability and personal touch, until the outbreak of WWII. Her meticulous timekeeping method and long-standing tradition represented a bridge between astronomical observation and personal timekeeping in a rapidly changing world.
HN commenters were fascinated by Ruth Belville's story, with many expressing admiration for her entrepreneurial spirit and the unique niche she carved out. Some discussed the technical aspects of her time-selling business, questioning the accuracy of her chronometer and how she managed logistics like transportation and client scheduling. Others drew parallels to modern subscription services, noting that she essentially offered "time as a service." A few users shared further historical context, pointing out other instances of time being a commodity or highlighting the transition to standardized timekeeping. Several commenters also lamented the loss of such quirky, individualistic businesses in the modern era.
Arsenal FC is seeking a Research Engineer to join their Performance Analysis department. This role will focus on developing and implementing AI-powered solutions to analyze football data, including tracking data, event data, and video. The ideal candidate possesses a strong background in computer science, machine learning, and statistical modeling, with experience in areas like computer vision and time-series analysis. The Research Engineer will work closely with domain experts (coaches and analysts) to translate research findings into practical tools that enhance team performance. Proficiency in Python and experience with deep learning frameworks are essential.
HN commenters discuss the Arsenal FC research engineer job posting, expressing skepticism about the genuine need for AI research at a football club. Some question the practicality of applying cutting-edge AI to football, suggesting it's more of a marketing ploy or an attempt to attract talent for more mundane data analysis tasks. Others debate the potential applications, mentioning player performance analysis, opponent strategy prediction, and even automated video editing. A few commenters with experience in sports analytics highlight the existing use of data science in the field and suggest the role might be more focused on traditional statistical analysis rather than pure research. Overall, the prevailing sentiment is one of cautious curiosity mixed with doubt about the ambitious nature of the advertised position.
Diamond Geezer investigates the claim that the most central sheep in London resides at the Honourable Artillery Company (HAC) grounds. He determines the geographic center of London using mean, median, and geometric center calculations based on the city's boundary. While the HAC sheep are remarkably central, lying very close to several calculated centers, they aren't definitively the most central. Further analysis using what he deems the "fairest" method—a center-of-mass calculation considering population density—places the likely "most central sheep" slightly east, near the Barbican. However, without precise sheep locations within the Barbican area and considering the inherent complexities of defining "London," the HAC sheep remain strong contenders for the title.
HN users generally enjoyed the lighthearted puzzle presented in the linked blog post. Several commenters discussed different interpretations of "central," leading to suggestions of alternative locations and methods for calculating centrality. Some proposed using the centroid of London's shape, while others considered population density or accessibility via public transport. A few users pointed out the ambiguity of "London" itself, questioning whether it referred to the City of London, Greater London, or another definition. At least one commenter expressed appreciation for the blog author's clear writing style and engaging presentation of the problem. The overall tone is one of amusement and intellectual curiosity, with users enjoying the thought experiment.
Transport for London (TfL) issued a trademark complaint, forcing the removal of live London Underground and bus maps hosted on traintimes.org.uk. The site owner, frustrated by TfL's own subpar map offerings, had created these real-time maps as a personal project, intending them for personal use and a small group of friends. While acknowledging TfL's right to protect its trademark, the author expressed disappointment, especially given the lack of comparable functionality in TfL's official maps and their stated intention to avoid competing with the official offerings.
Hacker News users discussed TfL's trademark complaint leading to the takedown of the independent live tube map. Several commenters expressed frustration with TfL's perceived heavy-handedness and lack of an official, equally good alternative. Some suggested the creator could have avoided the takedown by simply rebranding or subtly altering the design. Others debated the merits of trademark law and the fairness of TfL's actions, considering whether the map constituted fair use. A few users questioned the project's long-term viability due to the reliance on scraping potentially unstable data sources. The prevalent sentiment was disappointment at the loss of a useful tool due to what many considered an overzealous application of trademark law.
Summary of Comments ( 87 )
https://news.ycombinator.com/item?id=43431567
Hacker News users discuss the plausibility and potential causes of Heathrow's complete shutdown due to a power outage. Some question the lack of redundancy in a major airport's power system, speculating about cyberattacks or the impact of cost-cutting measures. Others highlight the cascading effects of such an outage, including flight disruptions, stranded passengers, and economic consequences. Several commenters with aviation or infrastructure experience offer insights into the complexities of airport power systems and the challenges of maintaining robust backup solutions. A few express skepticism about the official explanation, suggesting a deeper, undisclosed issue may be at play. Overall, the comments reflect a mixture of surprise, concern, and technical analysis regarding the vulnerability of critical infrastructure.
The Hacker News post titled "London's Heathrow Airport announces complete shutdown due to power outage" (linking to a CNN article about a hypothetical shutdown in 2025) has several comments discussing the plausibility and implications of such an event.
Several commenters express skepticism about the realism of the scenario presented in the CNN article. One points out the redundancy measures in place at major airports like Heathrow, designed specifically to prevent complete shutdowns due to power failures. They mention backup generators and multiple power feeds as examples. Another commenter questions the lack of detail in the article regarding the cause of such a widespread outage, suggesting that a simple power failure shouldn't cripple the entire airport.
The discussion also turns to the potential consequences of a complete Heathrow shutdown. One commenter highlights the massive disruption to air travel, not just in London but globally, given Heathrow's role as a major international hub. The cascading effects on connecting flights and passenger itineraries are mentioned as a significant concern. Another commenter speculates about the economic impact, considering the losses to airlines, businesses dependent on air travel, and the broader tourism industry.
Some commenters discuss the potential security implications of such an event. One raises the concern about the vulnerability of a major airport during a shutdown, particularly regarding passenger safety and baggage handling.
A few comments delve into the technical aspects of airport power systems, with one commenter suggesting that the scenario described in the article might indicate a cyberattack rather than a simple power failure.
Finally, some commenters use the hypothetical scenario as a jumping-off point to discuss broader issues of infrastructure resilience and the potential for cascading failures in complex systems. They question the preparedness of critical infrastructure to withstand large-scale disruptions and advocate for greater investment in redundancy and preventative measures.