How NASA built Artemis II’s fault-tolerant computer

The website is blocked due to security reasons after a suspicious action was detected. Please email the site owner with the Cloudflare Ray ID and details of the action that triggered the block.

Show HN: Keeper – embedded secret store for Go (help me break it)

https://opengraph.githubassets.com/7bf9ea37d3895d3bea2f5cb853102a32bb08a75c793992edc74f0cdec447d417/agberohq/keeper
Keeper is a Go library for a hardened secret store with four security levels, per-bucket DEK isolation, and a tamper-evident audit chain. It uses Argon2id key derivation and XChaCha20-Poly1305 authenticated encryption.

I still prefer MCP over skills

https://david.coffee/i-still-prefer-mcp-over-skills/banner.png
The author is against the "Skills" standard for LLMs, preferring the Model Context Protocol (MCP) for service integration. MCP provides a more practical and standardized way to connect LLMs to services.

ETH Zurich demonstrates 17,000 qubit array with 99.91% fidelity

https://ethz.ch/en/news-and-events/eth-news/news/2026/04/a-new-trick-brings-stability-to-quantum-operations/_jcr_content/articleLeadImage/image.imageformat.carousel.1623848018.jpg
Researchers at ETH Zurich have developed a highly stable swap gate for neutral atom qubits using geometric phases. This robust gate can be applied to 17,000 qubits simultaneously with a precision of over 99.9 percent.

Native Instant Space Switching on macOS

https://arhan.sh/_astro/settings.DnK3wkfD_Z2bVBxH.png
The user is frustrated with MacOS window management, specifically the inability to instantly switch spaces without animation. They found a solution called InstantSpaceSwitcher, a menu bar app that achieves instant space switching without drawbacks.

We've raised $17M to build what comes after Git

https://blog.gitbutler.com/_next/image?url=https%3A%2F%2Fd2m1ukvwmu7gz4.cloudfront.net%2FCleanShot%25202026-02-17%2520at%252011.06.49%25402x.png&w=3840&q=75
GitButler, a tool for software development, has raised $17M in Series A funding to redesign the way developers collaborate. The goal is to create a more social and intuitive platform that removes friction from collaboration and integrates AI tools seamlessly.

Model-Based Testing for Dungeons & Dragons

https://www.loskutoff.com/static/blog/dnd-quint-combat/splash.png
A spec is less than half the creature code. xstate happens to be the first runtime that mirrors it. you declare the shape of your data, and zod parses and validates that output if it's not readable... and then you run it again. this pattern generalizes beyond d&d. any domain with formal rules also has human decision points. the xstate machine routes to the wrong phase.

Artemis II and the invisible hazard on the way to the Moon

https://www.ansto.gov.au/sites/default/files/styles/hero_image/public/hero-images/Earth%20and%20moon_0.jpg?h=498e3814&itok=c7GdPYbY
NASA's Artemis II mission is testing radiation protection for humans beyond Earth's magnetic shelter, measuring how radiation levels change with trajectory and shielding. The mission will lay the foundation for safe human exploration of the Moon and Mars by characterizing the radiation field inside the spacecraft and linking it to biological effects.

Generative art over the years

https://blog.veitheller.de/assets/genart/phyllotaxis.png
The user has been making generative art since 2016, starting as a programming exercise and evolving into a personal journey of self-expression and discovery. Through experimentation and learning various algorithms and techniques, the user has developed a "vocabulary" of creative tools that inform their artistic decisions and help them convey a personal aesthetic.

Scientists invented a fake disease. AI told people it was real

https://media.nature.com/w767/magazine-assets/d41586-026-01100-y/d41586-026-01100-y_52248796.jpg
A researcher created a fake medical condition called bixonimania to test AI chatbots' ability to spread misinformation. The experiment was successful, with major AI systems repeating the invented condition as if it were real, highlighting the risks of relying on AI-generated references without verifying the underlying papers.

France Launches Government Linux Desktop Plan as Windows Exit Begins

https://s3.eu-west-par.io.cloud.ovh.net/numerique-gouv-website/numerique-gouv-website/images/SISE_oER7LEv.width-450.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=83d53d2d1ca64211b6b9581adffa67ce%2F20260410%2Feu-west-par%2Fs3%2Faws4_request&X-Amz-Date=20260410T104756Z&X-Amz-Expires=3600&X-Amz-SignedHeaders=host&X-Amz-Signature=95d543973c4ffeebe0f3dd7fe70e43149712b110cb80b57774ef8e6d16ce2257
À l’initiative du Premier ministre, du ministre de l'Action et des Comptes publics, et de la ministre déléguée chargée de l’Intelligence artificielle et du Numérique, la direction interministérielle du numérique (DINUM) a organisé mercredi 8 avril 2026 avec la direction générale des entreprises (DGE), l'agence nationale de la sécurité des systèmes d'information (ANSSI) et la ...

Charcuterie – Visual similarity Unicode explorer

https://charcuterie.elastiq.ch/social-share.png
A visual explorer for Unicode. Browse the character set, discover related glyphs, and learn more about the scripts, symbols, and shapes that make up the standard. Charcuterie is still under active development, and feedback is welcome. If you would like to support the project and help make more time for it, consider a donation.

The Art of Risk Management (2017)

You don't have permission to access "http://www.bcg.com/publications/2017/finance-function-excellence-corporate-development-art-risk-management" on this server.

RAM Has a Design Flaw from 1966. I Bypassed It [video]

Unfolder for Mac – A 3D model unfolding tool for creating papercraft

https://www.unfolder.app/img/og_image.jpg
Unfolder generates 2D parts for 3D models in seconds with optimized unfolding. It allows customization and export in various formats for printing, editing, or CNC cutting.

Penguin 'Toxicologists' Find PFAS Chemicals in Remote Patagonia

https://www.ucdavis.edu/sites/default/files/styles/sf_landscape_16x9/public/media/images/Penguin%20colony%202%20%28C%29%20Ralph%20Vanstreels.JPG?h=47f8d3d6&itok=1ya16FJB
Scientists used leg bands with chemical sensors on 54 Magellanic penguins to detect pollutants in their environment. The study found PFAS in over 90% of the bands, revealing exposure to pollutants in a remote region.

CollectWise (YC F24) Is Hiring

https://bookface-images.s3.us-west-2.amazonaws.com/logos/a5be02a3378f664e1f80f2a84997514d00f9fc1f.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=ASIAQC4NIECAP7E3APC3%2F20260410%2Fus-west-2%2Fs3%2Faws4_request&X-Amz-Date=20260410T045507Z&X-Amz-Expires=3600&X-Amz-Security-Token=IQoJb3JpZ2luX2VjEF0aCXVzLXdlc3QtMiJGMEQCIFf2XTlbMxZB7UrlleJLwGmBOzglJmW7nDgNQiqkfFfTAiAZiksJWMqHYvNe7NYf7L4gJUEJeSABxM%2Fr5Rjxr2jLlSrlAwgmEAAaDDAwNjIwMTgxMTA3MiIMtRddX0vjWWWRfFg8KsIDSVtYyUv2JkEGliTavvl3zdB6LAbR21W0uX23ApQ2EIe55DAsAy9FHhZSamo0Tl344S%2FgX63RrBhfhzWfeTDgu8y7aFA3WRyS2nrG7QeSW3LWVECGYVAIZvKqP96qDYNVtgDut3Vcxgwto%2FSKF1GOAhz7VstG7NCC38SxLEypMLpzF%2BVhMSTlotBFkq0Zg84%2BR6vP1dUl2hS827vBklwql4PGkm%2B67txMInMdo2GYk0qHnFEKevjYTmhCr5J80hCFKl7yU3%2B8Qy1NloLXUAItgpQ%2BMQwQj9QZKyQRb7mgjlxsKq6pGAniwEQTflj1omj5mAg7kA2bAO1t9eSPoOH%2BxnIBBRt1HfCxBJCbja0xsGVytVc8Hw3er82dhkXDq8rtAtQ63NXB0169jEc4WFxLLnnOhTQ4GaW2769koTeaGCTw%2Bb05MTYv7j3mXwurgysqCYAupMDzjo6qStRzVe%2FE5gXhdwClV%2B4gvHpnuvBgGP2wH8mrplZJoSL9%2FZGm8sVsE1BWGSo2LM3ozo8KsHKFidDjuwQKU0C%2BCww0UuV77g%2F24F4fcRVgRmgfbOyMWpKiUie%2BHFfB6sspbozIcsJT3BL7MIWC4s4GOqYBf6M6h%2BUzsWsk6zn4hadb1Mb9mhIzE5NsWtGcZMh88lUNmwx50dyDl4J5Csi2PAH7l5rU3PrbGHOPbZeW45JU1B8v1SHtd2Kdu6M1M%2B0iBdUlXzdcxHi2UhHiUP9EuIIEt7TsXCOGr7ohYGY9T39a3PjVFfuNSl6vq0WGrI40nnVQxCdE%2FwC1A88Fv2CMPiYetaRu0dfmTZW1LrpD44wdlbmDe%2F025g%3D%3D&X-Amz-SignedHeaders=host&X-Amz-Signature=ab018f88d9beb9683b14dad68a30588cf87251c36f0cd5472246be22f8fd17c4
CollectWise is a Y Combinator-backed startup using generative AI to automate debt collection. They're hiring an AI Agent Engineer to build voice AI infrastructure and reach $10 million in annual revenue within a year.

Old laptops in a colo as low cost servers

Transform your old laptop into a powerful server with our colocation services in Amsterdam and US datacenters for €7/month. We provide free shipping, setup assistance, and KVM access to your laptop in a secure, professional datacenter.

Principles of Mechanical Sympathy

https://martinfowler.com/articles/mechanical-sympathy-principles/cpu-memory-structure.png
Mechanical sympathy in software is the practice of creating systems that are sympathetic to their underlying hardware, optimizing performance by following principles such as predictable memory access and the single-writer principle. By applying these principles, developers can create surprisingly performant systems, such as the mechanically-sympathetic LMAX Architecture, which processes ...

War on Raze

Instant 1.0, a backend for AI-coded apps

https://paper-attachments.dropboxusercontent.com/s_331134A1AB81F48C9BB3AF9F0C08F3485C408CA845F0A79093D4B651B8B202E3_1775735518061_CleanShot+2026-04-09+at+04.51.412x.png
Instant is a full-stack app builder that allows developers to create unlimited apps with real-time, offline, and fast performance, using a multi-tenant database and sync engine. It provides a range of built-in services, including auth, file storage, presence, and streams, and is designed to be easy to use and maintain, with a focus on developer productivity and scalability.

Afrika Bambaataa, hip-hop pioneer, has died

https://ichef.bbci.co.uk/ace/standard/934/cpsprodpb/7483/live/0aeb9580-3477-11f1-a27c-25e679607533.jpg
Afrika Bambaataa, a founding figure of hip-hop culture, has died at 68 due to cancer complications. He helped shape hip-hop as a musical genre and cultural force, but his legacy was complicated by allegations of child abuse and trafficking.

PicoZ80 – Drop-In Z80 Replacement

https://eaw.app/images/picoZ80_sch_rp2350.png
The picoZ80 is a custom PCB designed to replace a physical Z80 in a host or industrial computer with a faster CPU, more memory, virtual devices, networking, and rapid application loading from an SD card. It hosts an RP2350B microcontroller, a dual-core 150MHz Cortex-M33 device capable of running at up to 300MHz, and an ESP32 co-processor for WiFi and Bluetooth connectivity.

Research-Driven Agents: When an agent reads before it codes

https://blog.skypilot.co/research-driven-agents/assets/banner.png
A coding agent was used to optimize the performance of the llama.cpp neural network model, resulting in a 15% speedup on x86 and 5% speedup on ARM. The agent's success was due to its ability to read papers and study competing projects before writing code, allowing it to identify optimizations that code-only agents would miss.

The Raft consensus algorithm explained through "Mean Girls" (2019)

https://images.ctfassets.net/00voh0j35590/2LNBTceAu0TfKie5aGyowm/75872520c1be835f08f09c03455d3c9c/giphy.gif
The Raft Consensus Algorithm is explained through the movie Mean Girls, where a clique of friends (the Plastics) replicates data and ensures consistency by achieving a majority vote. The leader of the clique (Regina George) sends heartbeats to maintain leadership status, and a new leader is elected when the current one is unable to assert dominance.

Zero-build privacy policies with Astro

https://www.openpolicy.sh/og/no-build-astro.png
When we launched the OpenPolicy Astro integration in March, it worked by generating Markdown files at build time. You added the plugin to astro.config.mjs, pointed it at an output directory, and Astro imported the generated .md files as components. It worked. But it added friction: an extra package, a .gitignore entry for the generated directory, and a file-watching step between your config ...

Hegel, a universal property-based testing protocol and family of PBT libraries

https://hegel.dev/_astro/hedgel-small.CU9UUzkn.webp
Hegel is a universal property-based testing protocol and family of libraries, built on Hypothesis.

Reverse engineering Gemini's SynthID detection

https://raw.githubusercontent.com/aloshdenny/reverse-SynthID/main/assets/synthid_watermark.png
Researchers reverse-engineered Google's SynthID watermarking system using signal processing and spectral analysis. They developed a multi-resolution spectral bypass (V3) that achieves high PSNR and can remove the watermark from images of various resolutions.

An AI robot in my home

https://allevato.me/img/mabu_reborn2.jpg
The author has concerns about having a smart robot, Mabu, in their home due to potential surveillance, data misuse, and hacking risks. They mitigate these concerns by controlling the recording feature and regulating interactions between Mabu and their children.

VFX HQ: Visual Effects Headquarters (2000)

VFX HQ is now an archive with online searchable articles. Visit Todd Vaziri's home page or FXRant blog for current info.