DRAM pricing is killing the hobbyist SBC market

https://www.jeffgeerling.com/blog/2026/dram-pricing-is-killing-the-hobbyist-sbc-market/raspberry-pi-price-increase-since-launch.jpg
Raspberry Pi increased prices for LPDDR4 RAM Pis, making high-end SBCs unaffordable for hobbyists. The hobbyist SBC market is dying due to high DRAM prices, with vendors like Radxa being the only exception.

Swappa.com for GrapheneOS compatible devices – Stay Away

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Artemis II lifts off: four astronauts begin 10-day lunar mission

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Artemis II's 10-day test flight is a historic mission with milestones, including the first woman and person of color in cislunar space. The mission aims to test the Orion spacecraft and pave the way for future lunar missions and a human landing on Mars.

Signing data structures the wrong way

Snowpack is a system that uses random, immutable 64-bit domain separators in the IDL to prevent domain separation bugs in cryptographic data. It ensures canonical encodings and guarantees that the sender and receiver agree on the type of data, making it a simple and effective solution for serialization of inputs to cryptographic functions.

Show HN: Git bayesect – Bayesian Git bisection for non-deterministic bugs

https://opengraph.githubassets.com/5d8f356b7ecef93e75eb578fa9a59d990c25b37a3ac013f950f0145649ffc14b/hauntsaninja/git_bayesect
git_bayesect uses Bayesian inference to identify commits introducing changes, with greedy minimisation of expected entropy and Beta-Bernoulli conjugacy. It sets priors based on commit messages and diffs to handle unknown failure rates.

Fast and Gorgeous Erosion Filter

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgeWotRn8KxGEbVTCIl1-znAH0ZDNSwFUf7hkp9GrJ4u5jfK8zS8-sA1SHtWyBaHSLx3Lskzcr0z_XzW9y4847lBQo8e_1TIHa49EQXT1XFbv0lui_ZKX-hNlpDChD3Wq3Rz9n4HcB3MwEosYU5Xi_IOTzADWDd18u4joJcgUOF94ZN-HNhLdZ_8tvnBpM/s1600/ErodedTerrain.png
The user explains an erosion technique for generating virtual landscapes, which involves using a special kind of noise to produce branching gullies and ridges while allowing fast and GPU-friendly evaluation. The technique has been developed and refined over time, with various approaches and tweaks to address issues such as chaotic distortions, inconsistent gully magnitudes, and non-straight gullies.

The revenge of the data scientist

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The data scientist role is not over, but its work has shifted from model training to experiment setup, debugging, and metric design. Data scientists still play a crucial role in evaluating AI systems and driving application-specific metrics.

Show HN: Flight-Viz – 10K flights on a 3D globe in 3.5MB of Rust+WASM

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Ask HN: Who is hiring? (April 2026)

Here are the job postings summarized in 2 concise English sentences each, not exceeding 200 characters:

EmDash – a spiritual successor to WordPress that solves plugin security

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Cloudflare's EmDash is a new, open-source CMS built on Astro, aiming to replace WordPress with a more secure, serverless, and AI-friendly platform. EmDash offers improved security, scalability, and ease of use, with features like plugin sandboxing, dynamic workers, and AI-driven content management.

InspectMind AI (YC W24) Is Hiring

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InspectMind AI is building an AI Plan Checker to review construction plans and find issues before building. The company is seeking a software engineer to improve accuracy and ship features quickly using AI coding agents.

Scientists crack a 20-year nuclear mystery behind the creation of gold

https://www.sciencedaily.com/images/1920/nuclear-physics-atomic-element.webp
Scientists at the University of Tennessee have made three key discoveries about how unstable atomic nuclei decay during the rapid neutron-capture process that creates heavy elements like gold. Their findings could improve models of stellar events and predict the behavior of exotic atomic nuclei.

Jax's true calling: Ray-Marching renderers on WebGL

User is using JAX for GPU accelerated graphics rendering with Signed Distance Functions (SDF) and auto-vectorization. They're exploring its potential for higher-level DSLs and geometric algebra.

NASA Artemis II moon mission live launch broadcast

https://plus.nasa.gov/wp-content/uploads/2026/03/victor.png?w=1024
Artemis II is NASA's first crewed mission under the Artemis program, launching from Kennedy Space Center in Florida. It will test the Orion spacecraft's life support systems and lay groundwork for future crewed missions.

StepFun 3.5 Flash is #1 cost-effective model for OpenClaw tasks (300 battles)

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A public benchmark for evaluating whether AI agents can complete real workflows. Compare model performance and cost-effectiveness on real agent tasks.

AI for American-produced cement and concrete

https://engineering.fb.com/wp-content/uploads/2026/03/Meta-AI-for-American-Concrete-HERO.jpg
Meta is releasing an AI model for designing concrete mixes, Bayesian Optimization for Concrete (BOxCrete), to help US producers use domestic materials. The model improves mix design speed and sustainability, reducing US reliance on imported cement.

Show HN: Dull – Instagram Without Reels, YouTube Without Shorts (iOS)

A browser strips out social media features designed to keep you scrolling, offering content filters, time limits, and more on-device. It's a tool that puts you in charge of what you see, without accounts, servers, or wellness features.

SpaceX files to go public

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Windows 95 defenses against installers that overwrite a file with an older one

https://devblogs.microsoft.com/oldnewthing/wp-content/uploads/sites/38/2019/02/ShowCover.jpg
Windows 95 had a backup directory to prevent installers from overwriting system files. It checked for mistakes after installers finished and restored the original files if necessary.

How-to guide: Commissioning a Sensor Physics R&D Lab

An Introduction to Writing Systems and Unicode

https://r12a.github.io/scripts/tutorial/images/early-char-sets.png
The Unicode Standard provides a superset of most character sets in use around the world, allowing for over one million code point slots and enabling simultaneous representation of various scripts and languages. Character encoding, such as UTF-8, UTF-16, and UTF-32, maps abstract characters to numbers for manipulation in a computer, and proper handling of character boundaries is crucial for ...

The Feedback Loop Is All You Need

https://zernie.com/images/article/still-broken.jpeg
So Claude Code added CRON a few days ago. Recurring tasks, native, built right in. The thing we've been dreaming about since the first AI coding demos — schedule an agent, go to sleep, wake up to merged PRs. An engineer that works while you don't. And I'm sitting here like… I can't even use this. Not on the real codebase. Not at work. I was at archive.com for four years — ...

Claude wrote a full FreeBSD remote kernel RCE with root shell

https://opengraph.githubassets.com/179eece63a9eb5f106dd5ffeb676e7ccfe60dfa24304e3385bc8001a8b462d22/califio/publications
FreeBSD 13.5 and later versions have a vulnerability in the RPCSEC_GSS module, allowing a remote kernel code execution attack via NFS. The vulnerability is due to a buffer overflow in the svc_rpc_gss_validate function.

Show HN: Zerobox – Sandbox any command with file, network, credential controls

https://raw.githubusercontent.com/afshinm/zerobox/refs/heads/main/packages/zerobox/assets/sandbox-flow.png
Zerobox is a tool for credential injection and sandboxing processes, allowing secrets to be passed to specific hosts without being visible to the process. It provides features like environment variable inheritance, network proxying, and restricted access to user data and system libraries.

Ask HN: Who wants to be hired? (April 2026)

Multiple individuals are sharing their professional profiles and seeking work opportunities in various fields, including software engineering, game development, data engineering, and design, with a focus on remote or flexible work arrangements. They have diverse skill sets and experiences, with some having worked on high-profile projects, and are looking for full-time, freelance, or ...

Random numbers, Persian code: A mysterious signal transfixes radio sleuths

https://gdb.rferl.org/c3f893f9-d529-4d26-f91e-08de3c642a37_w250_r1.jpg
A mysterious Persian-language numbers station started broadcasting on February 28, about 12 hours after US and Israel began bombing Iran. The signal was jammed on March 4, leading to speculation about its origin and purpose.

The OpenAI graveyard: All the deals and products that haven't happened

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Is BGP safe yet?

https://isbgpsafeyet.com/resources/open-graph.png
BGP security issues allow malicious actors to hijack devices, causing widespread problems. RPKI signing of Internet routes can improve BGP security.

Ada and Spark on ARM Cortex-M – A Tutorial with Arduino and Nucleo Examples

http://inspirel.com/articles/images/ada_on_cortex_cover_medium.jpg
This tutorial was written for all those who are interested in programming embedded systems and who would like to explore the idea of using Ada and SPARK in systems based on ARM Cortex-M microcontrollers.

Intuiting Pratt Parsing

https://louis.co.nz/assets/img/pratt/ast.png
Pratt parsing is a method for parsing expressions with varying precedence by walking back up the spine of the tree when a transition operator appears and building a left-leaning subtree. The Pratt parser uses a recursive descent parser with a call stack to build the tree, and it handles left-associative and right-associative operators by adjusting their left and right binding powers.