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A study published in JAMA finds that pilots and flight attendants have the highest radiation-related cancer mortality of any occupation, pointing to elevated exposure to cosmic radiation at cruising altitudes. The findings are drawing attention to occupational health risks in aviation and prompting discussion about whether crew members receive adequate monitoring and protection from cumulative radiation exposure over their careers.

A Hacker News discussion thread asks who still runs DOS machines that their business genuinely depends on. The prompt invites stories of legacy computing: factories, labs, or offices keeping decades-old MS-DOS or PC DOS systems alive because critical software or hardware was never ported to modern platforms. Commenters typically share examples of industrial controllers, embedded equipment, and the challenges of maintaining obsolete hardware, with debate over why such systems persist and how risky they are.

Researchers at the University of Cambridge report that measurable sex differences in attention can already be detected in newborn babies, suggesting the differences emerge far earlier in development than previously assumed. The finding is drawing discussion about how much of the gap is rooted in biology versus later social and environmental influence.

This trending item is a blog post explaining a common misconception: the UV index measures the strength of ultraviolet radiation that causes sunburn and skin damage, not the warmth you feel from sunlight. That warm sensation comes mostly from infrared radiation, which is separate from UV. Readers on Hacker News appear to be sharing and discussing the post, apparently finding it a useful correction of a widespread misunderstanding about what the index actually tracks.

Sherline Tools, the California-based maker of small precision lathes and milling machines long favored by hobbyists, model engineers, and small workshops, is shutting down and ending its US production. Word of the closure is spreading among machining and maker communities, where the company's American-made equipment has been a staple for decades. Enthusiasts are discussing what the loss means for the hobby-scale tool market and for anyone who depended on Sherline parts and support.

A new essay argues that bans on teen social media use address the wrong problem. Rather than restricting access by age, the piece suggests the focus should be on the underlying design of online platforms and how they capture attention. The debate over age limits for minors online continues to divide policymakers, parents, and researchers worldwide.

The term refers to the US diversity visa lottery, the program that randomly awards green cards to applicants from countries with low immigration rates, as well as to the annual H-1B visa lottery that skilled workers enter hoping to work in the United States. Discussion on Hacker News, linked to academic research on immigration restrictions and firms, reflects debate about how lotteries affect workers and companies. Posts appear to mix personal anecdotes with policy discussion, though the exact trigger is not clear from the evidence.

Venture investors Ben Horowitz and Marc Andreessen are funding a new academy positioned as an alternative to traditional college, according to the Wall Street Journal. The initiative taps into ongoing debate over the value and cost of higher education, with backers from Silicon Valley supporting new pathways for young people into tech careers.

Pirate Face is a site or service being discussed on Hacker News under a headline claiming it 'rescues LLM models from deletion'. The post suggests it offers a way to preserve or recover large language models that might otherwise be removed, but the linked evidence gives no detail about how it works or who is behind it. The platform labels it as medicine, which does not obviously match the topic, and commenters' reactions are not visible, so sentiment and specifics are unclear from the posts alone.

Apple's July 2010 press conference addressing the iPhone 4's antenna reception problems is drawing renewed attention. At the event, Steve Jobs disputed reports of widespread signal issues, attributed dropped calls to a formulaic signal-display flaw, and offered free bumper cases to buyers. The Q&A, in which Jobs famously told troubled users to 'avoid holding it that way,' is being revisited as a case study in crisis communications.