HN Top 10 — July 18, 2026
Today’s Top 10 on Hacker News
1. Regressive JPEGs
⭐ 393 💬 38 👤 vitaut 🔗 Discuss on HN
A creative project demonstrating ‘regressive JPEGs’ — intentionally crafted JPEG images that exploit the compression algorithm to produce increasingly distorted or unexpected visual artifacts. The author explores how specific patterns in image data can cause the JPEG encoder to produce progressively worse results, revealing quirks in one of the most widely-used image formats.
2. Funny item co-occurrences in 3.2M Instacart orders
⭐ 16 💬 14 👤 rogerdickey 🔗 Discuss on HN
An analysis of 3.2 million Instacart grocery orders revealing amusing and unexpected item pairings. The author mined this large dataset to find product combinations that frequently appear together — combinations like items from very different grocery categories — highlighting interesting patterns in how people actually shop.
3. LG monitors silently install software through Windows Update without consent
⭐ 35 💬 1 👤 baranul 🔗 Discuss on HN
LG has been distributing monitor configuration software through Microsoft’s Windows Update service without user knowledge or consent. When users connect an LG monitor via USB, Windows automatically pushes and installs LG’s software in the background. This raises privacy and consent concerns about manufacturers piggybacking on trusted update channels.
4. AWS: Inaccurate Estimated Billing Data – $1.7 billion
⭐ 1207 💬 711 👤 nprateem 🔗 Discuss on HN
An AWS user reported seeing estimated billing data showing $1.7 billion for a month of usage that normally costs under $5. This highlights a bug in AWS’s billing estimation system where the displayed costs are wildly inaccurate. The post has generated massive discussion with over 700 comments as other users share their own experiences with AWS billing anomalies and concerns about cloud cost visibility.
5. Thanks HN for 15 years of support and helping me find my life’s work
⭐ 622 💬 68 👤 nicholasjbs
Nicholas St. Bernard of the Recurse Center reflects on 15 years since launching the self-directed programming retreat. What started as a YC startup idea that failed evolved into something meaningful after a Hacker News post in 2011 helped reach beyond personal networks. HN remains their #2 source of applicants, and the center has positively impacted over 3,000 people. A heartfelt thank-you to the community.
6. Qubes OS Security in the Public Record
⭐ 12 💬 0 👤 sciences44 🔗 Discuss on HN
An academic paper on Qubes OS, a security-focused operating system that uses hardware virtualization to run isolated applications in separate virtual machines. The paper examines Qubes’ security model and its documentation in the public record, analyzing how the isolation-based approach to desktop security can be formally described and evaluated.
7. Porting nanochat to a TPU: what carries over from PyTorch, and what breaks
⭐ 38 💬 8 👤 tucan9389 🔗 Discuss on HN
A detailed write-up about porting the nanochat language model from PyTorch (running on GPU) to JAX for execution on Google TPUs. The author documents which parts of the code transfer cleanly, what API differences cause problems, and the specific changes needed to make the same model work on a different hardware/software stack.
8. Reviving a 15-year-old netbook with Arch Linux
⭐ 118 💬 79 👤 parksb 🔗 Discuss on HN
A walkthrough of giving new life to a 15-year-old netbook by installing a lightweight Arch Linux setup. The author documents the hardware limitations of the old device, the choices made to keep things running smoothly on minimal resources, and the practical steps involved. A practical guide for anyone looking to extend the life of aging hardware.
9. First atmosphere found on Earth-like planet in habitable zone of distant star
⭐ 466 💬 275 👤 neversaydie 🔗 Discuss on HN
Astronomers have detected the first atmosphere on an Earth-sized planet located in the habitable zone of a distant star. This represents a significant milestone in the search for potentially habitable exoplanets, as detecting atmospheric composition is a key step toward evaluating whether a planet could support life. The discovery was made using advanced telescopic observation techniques.
10. Waldi: A quiet place to write, and to be read
⭐ 13 💬 9 👤 waaldev 🔗 Discuss on HN
Waldi is a minimal, distraction-free writing application designed to be both a personal writing space and a platform for publishing. It emphasizes simplicity and focus, stripping away the noise and complexity found in most writing tools and platforms. The project is open source.