Show HN: Saunas lower nighttime heart rate more than exercise (n=59,000)

https://loved-hug-5d84552294.media.strapiapp.com/sauna_hr_984f14dcae.png
Saunas have a therapeutic effect and promote cardiovascular health by stimulating the heart and increasing blood volume. Sauna use is linked to better same-day recovery, with lower nighttime heart rates and increased activity.

ggsql: A Grammar of Graphics for SQL

https://opensource.posit.co/blog/2026-04-20_ggsql_alpha_release/greet.png
ggsql is a new data visualization tool that uses SQL syntax to create rich, structured visualizations, making it easy for SQL users to create custom plots. The tool is designed to be powerful, ergonomic, and safe, with a focus on integrating with AI agents and code-based reporting tools, and is currently available in alpha release.

GitHub's Fake Star Economy

https://awesomeagents.ai/images/news/github-fake-stars-investigation_hu_d97f4e9413d842ca.jpg
A Carnegie Mellon University study found 6 million fake GitHub stars across 18,617 repositories, with AI/LLM repos being the largest non-malicious category. The study's tool, StarScout, identified fake stars distributed by roughly 301,000 accounts.

Atlassian Enables Default Data Collection to Train AI

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

All phones sold in the EU to have replaceable batteries from 2027

To verify, complete the captcha or click the checkbox if it doesn't load. If still redirected, contact support.

10 years ago, someone wrote a test for servo that included an expiry in 2026

https://files.mastodon.social/cache/preview_cards/images/189/770/313/original/823a2203af2fb673.png
Someone wrote a unit test for @servo 10 years ago with a cookie expiry date of April 18, 2026, now the CI is broken. Maintainers suggest using system time or a library like TimeCop to make tests more robust.

M 7.4 earthquake – 100 km ENE of Miyako, Japan

The Earthquake Event Page application supports most recent browsers, view supported browsers. Or, try our Real-time Notifications, Feeds, and Web Services.

Qwen3.6-Max-Preview: Smarter, Sharper, Still Evolving

https://qianwen-res.oss-accelerate.aliyuncs.com/Qwen3.6/Figures/3.6_max_preview_banner.png
Qwen3.6-Max-Preview is an early preview of a proprietary model with stronger world knowledge and instruction following, along with improved agentic coding. It achieves top scores on six major coding benchmarks and is available through Alibaba Cloud Model Studio API.

WebUSB Extension for Firefox

https://opengraph.githubassets.com/5faedb93dc7cf1f56c26cb539f018dc5f7699b7f462a80319cade57fc64b6493/ArcaneNibble/awawausb
To use the extension, install the native stub program on your computer and a browser extension. The native stub requires a specific operating system and kernel version.

Focused microwaves allow 3D printers to fuse circuits onto almost anything

https://assets.newatlas.com/dims4/default/8155681/2147483647/strip/true/crop/2052x1368+252+0/resize/1200x800!/format/webp/quality/85/?url=https%3A%2F%2Fnewatlas-brightspot.s3.amazonaws.com%2F38%2F89%2F8e875c014ad1bc0501758de48f24%2Fhero.png
Engineers at Rice University developed a device called Meta-NFS that concentrates microwave energy to cure conductive ink without damaging the surface underneath. This breakthrough enables the creation of smart implants, ingestible electronics, and soft robots with deeply integrated electronics.

NSA is using Anthropic's Mythos despite blacklist

https://images.axios.com/1ujwULwMdbF4wPAwKN1n8lQYPsk=/0x316:4210x2684/1920x1080/2026/04/19/1776621364921.jpeg?w=3840
The NSA is using Anthropic's powerful model Mythos Preview despite the Pentagon's feud with the company over security concerns. The government's cybersecurity needs are outweighing the Pentagon's concerns, with Anthropic's tools being used more widely within the department.

Up to 8M Bees Are Living in an Underground Network Beneath This Cemetery

https://cdn.discovermagazine.com/assets/image/59093/bee-in-andrenidae-family-xs.jpg
Researchers found a massive underground city of 5.6 million ground-nesting bees at East Lawn Cemetery in New York. The bees, a native species, pollinate crops like apples and blueberries, and their large population rivals that of honeybees.

Ask HN: How to solve the cold start problem for two-sided marketplace?

To start a P2P crowdshipping marketplace, focus on a niche market, such as a specific route or item, and manually match people or incentivize one side to join without the other. Options include paying drivers to make deliveries, being the supply side yourself, or using an agency model, but be aware of the potential risks and challenges, such as competition from established businesses and ...

SDF Public Access Unix System

join welcome faq status members store tour gopher abuse dialup minecraft social tilde europa webmail gallery usermap irc tutorials telnet git ssh Web Browser SSH For new users WeTTY SSH in browser client ©1987-2065 SDF Public Access UNIX System, Inc. 501(c)(7) (this page was generated using ksh, sed and awk)

U.S. banks may soon collect citizenship data from customers

https://image.cnbcfm.com/api/v1/image/108292102-4ED3-REEQ-INVEST-BESEENT-041526.jpg?v=1776285846&w=750&h=422&vtcrop=y
Treasury Secretary Scott Bessent says banks will be required to collect citizenship data as part of a new executive order. Bessent argues that verifying customer status is necessary for banks to comply with "know your customer" rules.

Vercel April 2026 security incident

https://www.bleepstatic.com/content/hl-images/2026/04/19/vercel-header-lg.jpg
Vercel disclosed a security incident after threat actors claimed to have breached its systems and are selling stolen data. The company is investigating and notifying affected customers, advising them to review environment variables and rotate secrets.

What if database branching was easy?

https://xata.io/_next/image?url=%2Fapi%2Fmedia%2Ffile%2Fseed-ts-through-the-ages.png&w=3840&q=75&dpl=dpl_odh9oLAqRFvNk6tx5mN26DnQVX9y
Database branching with copy-on-write technology allows for isolated and fresh environments without recreating all data every time. This approach is more efficient and cost-effective than traditional seeding methods, especially for large databases and complex workflows.

I Made the "Next-Level" Camera and I love it

https://thelibre.news/content/images/2026/04/image-17.png
The user built a custom camera system called Lampone using a large lens, a fake sensor made of semi-transparent material, and a Fresnel lens to achieve a very thin depth of field. The system has some limitations, including a large minimum focusing distance, structural instability, and significant light loss, but the user is planning to improve it in future iterations.

Stop trying to engineer your way out of listening to people

https://images.unsplash.com/photo-1453738773917-9c3eff1db985?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&ixid=M3wxMTc3M3wwfDF8c2VhcmNofDE2fHxsaXN0ZW58ZW58MHx8fHwxNzcwODU1NDg2fDA&ixlib=rb-4.1.0&q=80&w=1200
People avoid doing work by trying to create systems to replace human interaction, but the problem is they're not listening properly to others. To listen effectively, one must understand the complexities of human knowledge and experiences, avoiding assumptions and stereotypes.

Epicycles All the Way Down (2025)

https://substackcdn.com/image/fetch/$s_!Sw2a!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F00cefbfd-5758-41cb-ad4d-b6f7fc71c8dc_1272x507.png
The author discusses why Large Language Models (LLMs) feel like understanding engines but behave like over-fit pattern-fitters, and how their failures resemble flash crashes and market blow-ups rather than Skynet. The author proposes that LLMs learn patterns and then we try to prune the learned patterns towards a world where they can be guided towards the ground truth, which helps explain ...

Claude Token Counter, now with model comparisons

https://static.simonwillison.net/static/2026/claude-token-count.jpg
Claude Token Counter now compares different models, including Opus 4.7 and 4.6, Sonnet 4.6, and Haiku 4.5. Opus 4.7 uses an updated tokenizer, increasing token counts by 1.0-1.35x, and costs 40% more due to the same pricing.

Zero-copy protobuf and ConnectRPC for Rust

https://miro.medium.com/v2/resize:fit:679/format:webp/253d1ac7271c0a7cc8f41cd8f9de7fb7148297ef9c17b11e085fd6559557c22b
Anthropic open-sourced two Rust crates, buffa and connect-rust, for Protocol Buffers and ConnectRPC implementation. The crates provide performance and correctness improvements, including zero-copy message views and monomorphic dispatch.

IPC medley: message-queue peeking, io_uring, and bus1

The kernel provides a number of ways for processes to communicate with each other, but they never quite seem to fit the bill for many users. There are currently a few proposals for interprocess communication (IPC) enhancements circulating on the mailing lists. The most straightforward one adds a new system call for POSIX message queues that enables the addition of new features. For those ...

NASA Artemis Posters

https://images-assets.nasa.gov/image/Artemis%20Logo%20Color%20Positive%20RGB-July%202021/Artemis%20Logo%20Color%20Positive%20RGB-July%202021~orig.jpg?w=1528&h=1424&fit=clip&crop=faces%2Cfocalpoint
With Artemis missions, we are exploring the Moon for scientific discovery, technology advancement, and to learn how to live and work on another world as we prepare for human missions to Mars.

How Motorola’s 2N2222 and 2N3904 transistors became the default NPNs

https://www.allaboutcircuits.com/uploads/articles/2N2222_and_2N3904.jpg
The 2N2222 and 2N3904 transistors survived over 60 years due to Motorola's process innovation, cheap packaging, and JEDEC numbering system. They became multi-sourced commodities, still in production from various manufacturers and stocked by major distributors.

A Brief History of Fish Sauce

https://www.legalnomads.com/wp-content/uploads/2016/07/P1066245-1024x766.jpg
Fish sauce has a long history, with ancient Greeks and Romans producing garum and liquamen, while Southeast Asians independently developed nuoc mam and nam pla. The origins of fish sauce are unclear, but it remains a crucial condiment in Southeast Asian cuisine, with various regional variations and uses.

Who Is Blake Whiting?

https://theamericanscholar.org/wp-content/uploads/2026/04/lawler-books-1024x538.jpg
Amazon is selling fake history books by "Blake Whiting," a non-existent author created with AI tools, which are fooling readers and threatening the livelihoods of real historians and writers. The books are being published through Amazon's Kindle Direct Publishing, which claims to monitor its catalog but failed to detect the fake author.

Turtle WoW classic server announces shutdown after Blizzard wins injunction

https://cdn.mos.cms.futurecdn.net/Ba252N3UzmCkmpAK2B5t3j.jpg
Turtle WoW, a popular World of Warcraft private server, is shutting down on May 14 after a cease and desist from Blizzard. The server will close its servers to the final patch and associated social media channels will shut down later this year.

Monumental ship burial beneath ancient Norwegian mound predates the Viking Age

We’re checking your connection to prevent automated abuse

The Bromine Chokepoint

https://warontherocks.com/wp-content/uploads/2025/06/Cogs-Icon-3.png?v=1773080986
A global semiconductor memory supply chain is vulnerable to a bromine shortage due to Israel's reliance on bromine imports and limited conversion capacity outside the country. A disruption would immediately impact global memory production, affecting consumer devices, military systems, and AI infrastructure.