Identify a London Underground Line just by listening to it (tubesoundquiz.com)
The Tube Sound Quiz website invites users to guess which London Underground line they’re hearing by matching distinctive sounds through a short 10-question listening quiz.
We found an undocumented bug in the Apollo 11 guidance computer code (juxt.pro) AI
A Juxt team says it uncovered an old, undocumented Apollo Guidance Computer flaw: a gyro “LGYRO” lock that is not released when the IMU is caged during a torque operation. Using an AI-assisted behavioural specification (Allium) derived from the AGC’s IMU code, they found an error path (BADEND) that would cause later gyro commands to hang, preventing realignment. The article argues this kind of resource-leak bug can be missed by code reading and emulation but surfaced by modelling resource lifecycles across all execution paths.
Germany Power Prices Turn Deeply Negative on Renewables Surge (bloomberg.com)
Germany’s power prices have reportedly turned deeply negative as a surge in renewable generation pushed supply above demand, forcing electricity prices to fall below zero.
The Workers Opting to Retire Instead of Taking on AI (wsj.com) AI
The article examines why some workers are choosing early retirement rather than staying employed to deal with or adapt to workplace AI changes, focusing on concerns about job disruption and the burden of reskilling.
Purple: Terminal SSH Client for macOS and Linux (getpurple.sh)
Purple is a free, open-source terminal SSH client for macOS and Linux that aims to consolidate common server tasks—finding hosts, running commands on multiple machines, transferring files, and managing Docker/Podman containers—into one interface. The article describes syncing server lists from multiple cloud providers, handling credentials via local password managers, and optionally exposing host access to AI agents through an MCP server. It also notes that Purple won’t send the user’s SSH config off the machine and is delivered as a single binary.
Blackholing My Email (johnsto.co.uk)
In 2002, Dave Johnston had to ask his ISP (BT) to “blackhole” his primary personal email address (dv@btinternet.com) after increasingly sophisticated email worms flooded his inbox and threatened closure of the broadband account. The article describes how worms evolved to harvest addresses from local files and evade filtering, eventually making the mailbox unusable and even causing spoof-related bouncebacks. Johnston later found the account no longer exists, though he wonders whether it ever continued to receive malicious traffic.
Breaking the console: a brief history of video game security (sergioprado.blog)
The article traces how video game console security evolved from early systems with virtually no protections to later attempts at enforcing authenticity through hardware lockout chips, optical-disc authentication, and finally cryptographic code-signing. It highlights recurring patterns—security measures based on obscurity or media checks eventually being reverse-engineered or bypassed—citing examples like the NES 10NES/CIC lockout, PlayStation modchips and disc swap attacks, and the Xbox’s cryptographic boot-chain followed by “softmod” exploits via vulnerable save-file parsers and memory-safety bugs. The author concludes that while threat models differ across devices, many of the same underlying security challenges reappear across decades.
Floating point from scratch: Hard Mode (essenceia.github.io)
The article explains how IEEE 754 floating-point works by building intuition from the raw bit-level representation, covering tricky cases like signed zero, NaNs (including quiet vs signaling), infinities, and denormals with gradual underflow. It then discusses rounding modes and how they affect results when values fall outside a format’s representable range, setting up for a deeper “from scratch” and hardware/ASIC-focused implementation later.
Are We Idiocracy Yet? (idiocracy.wtf)
The linked page provides only the headline “Are We Idiocracy Yet?” with no additional article text available from the fetch, so its argument or claims can’t be summarized from the provided content.
Iran threatens OpenAI's Stargate data center in Abu Dhabi (theverge.com) AI
Iran’s Islamic Revolutionary Guard Corps released a video threatening to attack US-linked energy and technology companies in the region, including OpenAI’s planned Stargate data center in Abu Dhabi, if the US targets Iran’s power plants. The report points to Stargate’s large Abu Dhabi investment and ongoing construction, while noting OpenAI has not yet responded to requests for comment. The threat comes amid broader US-Iran escalation over energy infrastructure and regional security.
Show HN: AdaShape-3D modeler for intuitive 3D printing parts / Windows 11 (adashape.com)
AdaShape is a Windows 11 (Intel/AMD) desktop 3D modeler being offered as a free public alpha that aims to make printable part design easier using simple shape building, numeric precision, and undoable edits. The tool supports solid operations like cutting, joining, and intersections, and exports models to common printer formats like OBJ and 3MF without requiring a dedicated GPU. It’s in pre-alpha with parametric modeling features and version/history handling under development, with feedback collected via Discord.
Astronauts honor Artemis commander's deceased wife in emotional moon moment (cnn.com)
Former NASA astronaut Danny Olivas reacted as the Artemis II crew named a lunar crater for Commander Reid Wiseman’s late wife, in a moment intended to honor her legacy. The segment highlights the crew’s gesture during their mission-related preparations and the emotional response from those involved.
A New Oil Shock Accelerates a Return to Nuclear Power (nytimes.com)
The article argues that a new oil shock and heightened energy concerns are pushing some policymakers and utilities to reassess nuclear power as an alternative source of electricity, including in the context of geopolitical risks in the Middle East.
Every GPU That Mattered (sheets.works)
The interactive “Every GPU That Mattered” timeline charts 30 years of notable graphics cards, comparing their launch eras, transistor counts, and which models dominated consumer use as reflected by Steam Hardware Survey data.
Second Revision of 6502 Laptop (codeberg.org)
Developer TechPaula shared a second, slimmer revision of their 6502/65C02 laptop project (LT6502b), listing current specs like a 14 MHz 65C02, 46 KB RAM, EhBASIC/eWozMon software, Compact Flash storage, and a built-in battery. The update notes improved ergonomics (key placement), a single USB-C connector for charging/data, and work-in-progress status including board assembly, display connectivity, and testing. The post also documents the system’s memory map and peripheral layout, along with recent repository commits to demo code, schematics notes, and hardware design files.
Show HN: I built a site that turns your Steam gaming hours into a RL skill tree (alternatelife.xyz)
Alternate Life is a web tool that lets users input their public Steam profile to convert their recorded gaming hours into a “real-life” style skill tree, with selectable stats and timelines for the generated results.
Build web apps for smart glasses (hub.evenrealities.com)
Even Realities’ documentation outlines how to build web apps for its G2 smart glasses using standard web technologies plus the Even Hub SDK. It describes the glasses’ hardware and privacy-focused design (no camera or speaker), notes that app logic runs on the paired phone while the glasses handle display and native scrolling, and explains a workflow involving local preview in the simulator, sideloading or dev-portal builds, packaging, and uploading to Even Hub for distribution.
When War Crimes Rhetoric Becomes Battlefield Reality (justsecurity.org)
Just Security argues that recent public threats to strike Iran’s electric generating plants and other civilian infrastructure would, if carried out, collide with core laws-of-war rules protecting civilian objects. The authors say such rhetoric pressures commanders and legal advisers to reconcile “total war” style statements with strict requirements for case-by-case analysis, concrete military advantage, and balancing expected civilian harm. They also note that servicemembers could face later legal scrutiny if strikes proceed despite the stated intent to ignore “rules of engagement,” and draw comparisons to alleged war crimes involving energy infrastructure in Ukraine.
Three hundred synths, 3 hardware projects, and one app (midi.guide)
MIDI Guide’s community-built database of MIDI CC and NRPN implementations has grown past 300 instruments, reflecting contributions from dozens of people. The post traces how the iOS/macOS performance app Condukt (launched in 2026) and related documentation efforts led to the dataset, which later spread into multiple hardware and software projects. It also highlights a recent site and data refactor, plus new real-world device support from products like Neuzeit’s Drop and Reliq’s controller platform.
Some iPhone Apps Receive Mysterious Update 'From Apple' (macrumors.com)
MacRumors reports that some iPhone apps have received App Store updates with notes indicating the update was made “from Apple,” without adding new features. Apps named in the report include VLC, Mortal Kombat, Duet Display, and others. The publication says it couldn’t identify specific code changes and that it’s unclear what Apple is fixing or why the updates appear even for apps that haven’t been updated in a while.
My Experience as a Rice Farmer (xd009642.github.io)
An author describes helping on a family rice farm in rural Japan’s Shizuoka prefecture, covering spring field preparation, flooding and leveling, rice transplanter planting, and the need to drain fields as the crop grows. They also recount problems like sinkhole water loss, wildlife damage from boar and deer (and fencing to stop it), and other farm tasks such as managing drainage ditches and watching for local fauna. The piece ends by touching on the economics of Japanese rice farming, including aging farmers, limited part-time work, and price pressures that can affect sustainability.
People Love to Work Hard (anildash.com)
Anil Dash argues that the repeated claim that employees “don’t want to work hard” is unfounded and used to blame workers or justify poor pay and workplace conditions. He says people will work intensely when teams have a clear goal, shared values, trust and autonomy, and leadership that provides resources and avoids dehumanizing or harmful systems. When workers seem less “productive,” he argues it often reflects stress, lack of agency, surveillance, meaningless metrics, and erosion of basic employment protections rather than a lack of motivation.
Apollo Guidance Computer Restoration Videos and Press Coverage (curiousmarc.com)
The CuriousMarc page compiles videos and press coverage about restoring the Apollo Guidance Computer (AGC), including restoration progress, schematics, and related technical references. It links to coverage such as a Wall Street Journal segment and other articles/podcasts describing how restoration experts—including Jimmie Loocke’s restored lunar-module computer—aim to get the system running again. The post also points readers to Ron Burkley and Mike Stewart’s “Virtual AGC” resources and to specific restoration video episodes covering topics like memory issues and connector work.
Claude Is Not Your Architect. Stop Letting It Pretend (hollandtech.net) AI
The article argues that AI tools like Claude can produce plausible but context-free system designs and then short-circuit the human architecture debate, leaving teams to implement “Jenga tower” solutions they didn’t choose. It warns that architectural decisions may get rubber-stamped because AI sounds confident and “senior engineers reviewed it,” creating an accountability gap when designs fail in real production constraints. The author recommends keeping engineers responsible for design and trade-offs while using AI mainly to speed implementation.
Peptides: where to begin? (science.org)
The article offers guidance for readers who are just starting to learn about peptides, outlining what they are and how to approach studying them, based on the basics and where to begin for further reading.