Artemis II crew take 'spectacular' image of Earth

https://ichef.bbci.co.uk/news/480/cpsprodpb/99c2/live/d50d99f0-2f7a-11f1-b297-95b0a0a8331e.jpg.webp
Nasa's Artemis II crew took high-resolution images of the Earth as they headed to the Moon. The images show the Atlantic Ocean, atmosphere, and auroras, with the Earth appearing upside down.

Show HN: TinyOS – A minimalist RTOS for Cortex-M written in C

https://opengraph.githubassets.com/9647b40edbed7efbdb7effae5d8a85d258851a22701d037ad2eec3ddb28717e7/cmc-labo/tinyos-rtos
This is a summary of the provided text in 2 concise English sentences, not exceeding 200 characters.

iNaturalist

https://static.inaturalist.org/wiki_page_attachments/3154-medium.png
iNaturalist is a social network for naturalists! Record your observations of plants and animals, share them with friends and researchers, and learn about the natural world.

What changes when you turn a Linux box into a router

We can turn a Linux system into a router or switch by making 7 changes to the system, including enabling packet forwarding, defining a bridge, and configuring netfilter rules to filter traffic. These changes allow us to create a complete forwarding system, including enabling IP forwarding, defining a bridge, configuring netfilter rules, deploying a DHCP and DNS server, and vending WiFi ...

Show HN: I built a frontpage for personal blogs

https://text.blogosphere.app/og.png
The frontpage of the indie web. Discover the latest posts from independent blogs across the web.

Fake Fans

https://substackcdn.com/image/fetch/$s_!yOGu!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb1d34460-fe78-42fd-9b08-ca235e413f2b_620x422.webp
Chaotic Good is a digital marketing agency that creates virality for musicians by manufacturing fake fan accounts and controlling online discourse. Their tactics aim to shift the burden of promoting artists from the artists themselves to the agency.

Oracle Files H-1B Visa Petitions Amid Mass Layoffs

https://nationaltoday.com/wp-content/uploads/not-wordpress/2026/04/69cff13a331fe.jpg
Oracle filed 3,126 H-1B visa requests despite laying off thousands of American workers. The company's actions raise concerns about replacing US workers with cheaper foreign labor through the H-1B program.

Go on Embedded Systems and WebAssembly

https://tinygo.org/images/tinygo-logo.png
TinyGo brings Go to embedded systems and the web with a new LLVM-based compiler. It supports over 100 microcontrollers and produces WebAssembly code for web and edge computing.

We replaced RAG with a virtual filesystem for our AI documentation assistant

https://www.mintlify.com/_next/image?url=%2Fimages%2Ffeatured%2Fhow-we-built-a-virtual-filesystem-for-our-assistant.png&w=1920&q=75
The team created a virtual filesystem called ChromaFs to power their documentation assistant, allowing it to explore documentation like a codebase without the need for real sandboxes. ChromaFs uses a Chroma database to provide instant session creation, zero marginal compute cost, and built-in role-based access control, replacing the need for expensive sandboxes.

Charge Robotics (YC S21) Is Hiring Software and Hardware Engineers

https://app.ashbyhq.com/api/images/org-theme-logo/245e1357-fdad-4538-b768-fbc50d9a625b/e90ad744-2cfa-4bef-bbf2-c8f00d147795/d108bc03-6e25-40ec-85b4-5ccda2c6d3ec.png
Charge Robotics Jobs

The house is a work of art: Frank Lloyd Wright

We're verifying your browser Website owner? Click here to fix

Tell HN: Anthropic no longer allowing Claude Code subscriptions to use OpenClaw

Anthropic is changing its policy for third-party harnesses, requiring extra usage and a pay-as-you-go option starting April 4. A one-time credit and discounts for pre-purchased extra usage are being offered to ease the transition.

Samsung Magician disk utility takes 18 steps and two reboots to uninstall

The user had trouble removing Samsung Magician, a disk utility software, from their Mac due to its poor uninstallation process. They had to use multiple commands and even disable and re-enable System Integrity Protection to delete the remaining files.

How to Make a Sliding, Self-Locking, and Predator-Proof Chicken Coop Door (2020)

https://www.backyardchickens.com/data/attachments/2229/2229106-c3dac488f4013d120f4c6c7b5e8c1a3e.jpg?hash=w9rEiPQBPR
A secure coop door design uses a vertical sliding door with a self-locking mechanism, eliminating the need for external locking. The door is designed to be easy to build using a jigsaw, drill, and table saw, with a counterweight or spring hinge for smooth operation.

A Taxonomy of Interiors

https://i0.wp.com/misfitsarchitecture.com/wp-content/uploads/2026/03/unnamed.png?fit=512%2C310&ssl=1
The author is exploring the concept of interior design, questioning the urgency to blur the distinction between inside and outside, and examining how objects relate to space. They propose a framework for understanding the types of aesthetic relationships between objects and spaces.

Iran Strikes Leave Amazon Availability Zones "Hard Down" in Bahrain and Dubai

https://substackcdn.com/image/fetch/$s_!6X95!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F29bf6a18-10a1-409f-90c7-937af2bea02d_2706x1644.png
Amazon's AWS availability zones in Dubai and Bahrain are down due to Iranian strikes and will be unavailable for an extended period. Amazon is advising employees to deprioritize the regions and is helping customers migrate to other locations.

Async Python Is Secretly Deterministic

https://cdn.prod.website-files.com/672411cbf038560468c9e68f/69ccad5e3c7a9d4e05cffa0a_cac94705.png
To make async Python workflows deterministic, we need to understand the event loop's single-threaded execution model and how tasks are scheduled in FIFO order. By incrementing step IDs before the first await in each step, we can deterministically order steps and ensure consistent execution order during recovery.

F-15E jet shot down over Iran

https://i.guim.co.uk/img/media/b3a968d7b868ec4522eec1f7cf3b8635d03c06a8/0_126_901_721/master/901.jpg?width=445&dpr=1&s=none&crop=none
A US F-15E Strike Eagle fighter was shot down over Iran, prompting a US search and rescue effort for its two crew members. One crew member was reportedly rescued in a high-risk operation, with the fate of the second crew member still unclear.

DCJ11Hack+ – DEC PDP/11 based homebrew computer

https://codeberg.org/TechPaula/DCJ11HackPlus/media/branch/main/images/DCJ11_CPU.png?raw=true
You're sharing a DCJ11 based board with a backplane for adding/removing functionality. It includes a main CPU board, RAM, ROM, and text display board with schematics and PCB files available.

Build your own Dial-up ISP with a Raspberry Pi

https://www.jeffgeerling.com/blog/2026/build-your-own-dial-up-isp-with-a-raspberry-pi/pi-isp-ibook-hero.jpeg
The user set up a local dial-up ISP using a Raspberry Pi and an old modem to emulate a dial-up connection on an iBook G3 from 1999. They used a phone line simulator and a USB modem to establish a connection and browsed the internet using Macproxy Classic.

Automatic Textbook Formalization

https://opengraph.githubassets.com/50be3918516831420168745068f834f2de98dca108e2f358239fb2d4985cd48b/facebookresearch/repoprover
RepoProver is a multi-agent scaffold for formalizing math textbooks in Lean, using LLM agents for translation, proof, and review. It uses a shared git repository and lightweight issue tracker for coordination.

The Hardest Document Extraction Problem in Insurance

https://cdn.prod.website-files.com/67bce5e386b7ca213dda9515/69c45c098c6a25e2291491f4_diagram%20.png
FurtherAI built a self-correcting AI system to accurately extract data from messy insurance documents, achieving 95% row count accuracy by allowing the agent to check and fix its own output. The system's success relies on giving the agent validation tools and success criteria, rather than relying on prompt design or rigid procedures, allowing it to reason about document structure and detect ...

April 2026 TLDR Setup for Ollama and Gemma 4 26B on a Mac mini

Show HN: Ismcpdead.com – Live dashboard tracking MCP adoption and sentiment

https://pub-bb2e103a32db4e198524a2e9ed8f35b4.r2.dev/8ae1ba04-851f-4647-bc4e-9585c8103e59/id-preview-f1178039--4f9b4640-85e5-433b-885d-cdfbb01a26d0.lovable.app-1775182235420.png
The Model Context Protocol (MCP) released its 2026 roadmap focusing on scalability, governance, and enterprise readiness. MCP faces security concerns and usability improvements are being made through simplified integrations and documentation.

Show HN: TurboQuant for vector search – 2-4 bit compression

https://opengraph.githubassets.com/34c8e45da3d61fa38977e7ffa220f29c249cd6f24d2e26397611a1d5cac7f74e/RyanCodrai/turbovec
TurboQuant compresses high-dimensional vectors to 2-4 bits per coordinate with near-optimal distortion. It's online, zero-training, and faster than FAISS IndexPQFastScan on ARM and within 18-25% on x86.

SSH certificates: the better SSH experience

SSH certificates provide a better and more seamless SSH experience by eliminating the need for Trust on First Use (TOFU) and allowing for short-lived keys, forced-commands, and automated key management. An SSH CA can be used to sign host keys and user keys, making it easier to manage SSH connections and eliminating the need for manual key deployment and TOFU.

Firm boosts H.264 streaming license fees from $100k up to staggering $4.5M

https://cdn.mos.cms.futurecdn.net/3wzYaofEETCfXdQmREx9BK.png
Via LA restructured H.264 streaming license fees in a tiered system topping at $4.5 million per year for large platforms. The change applies to new license seekers in 2026 or later, not affecting existing license holders.

Linux Running in a PDF (2025)

A Recipe for Steganogravy

A Python CLI uses neural linguistic steganography to hide data in recipe blog introductions. It encodes data as natural language using arithmetic coding steganography, requiring the same model and prompt for decoding.

What category theory teaches us about dataframes

The author analyzes the structure of dataframes and identifies three fundamental operations: Delta (restructuring), Sigma (merging), and Pi (pairing), which can be used to build a dataframe algebra. Category theory provides a framework for understanding these operations and their relationships, allowing for a more principled design of dataframe libraries.