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LetsEncrypt – Expiration Notification Service Has Ended

news.ycombinator.com Unknown 2026-02-22 10:49:39

Since its inception, Let’s Encrypt has been sending expiration notification emails to subscribers that have provided an email address to us via the ACME API. This service ended on June 4, 2025. The decision to end the service is the result of the following factors: Over the past 10 years more and more of our subscribers have been able to put reliable automation into place for certificate renewal. Providing expiration notification emails means that we have to retain millions of email addresses c

Topics: email encrypt expiration let service

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Show HN: Summle – A little maths Game

news.ycombinator.com Nick Nicholaou 2026-02-18 04:58:38

Make sums using the tiles at the bottom to reach the target number at the top, in 5 steps or fewer. Click numbers to add or remove them. Example You can use each number tile once. You may not need all the tiles. You can use yellow subtotal tiles in a new sum. There is at least one solution. New puzzle daily.

Topics: example new number tiles use

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NASA Continues Testing Multi-Billion Dollar Rocket While Trump Is Actively Trying to Cancel It

futurism.com Unknown 2026-02-22 02:30:17

Despite president Donald Trump's plans to phase out Boeing's mega-expensive Space Launch System rocket for NASA, the agency is currently trundling ahead with the original plan. As Ars Technica reports, NASA and Northup Grumman tested an experimental hydrogen-based propulsion engine this week that's slated to launch the world's first crewed trip to the Moon as part of the agency's long-awaited Artemis mission. Unfortunately, this week's SLS engine test — the second such test launch in a week —

Topics: expensive launch mission nasa sls

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Performance Debugging with LLVM-mca: Simulating the CPU

news.ycombinator.com Ivica Bogosavljević 2026-02-22 04:41:09

Some time ago I had a performance problem that wasn’t easy to explain by just looking at the code, since the version I expected to be faster was actually slower. Since the problem is simple yet illustrative, I am using it as a showcase on how to debug performance issues using llvm-mca. According to it’s documentation llvm-mca is a performance analysis tool that uses information available in LLVM (e.g. scheduling models) to statically measure the performance of machine code in a specific CPU. In

Topics: 4s execution instruction load version

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A neural brain implant provides near instantaneous speech

arstechnica.com Unknown 2026-02-22 02:00:58

Stephen Hawking, a British physicist and arguably the most famous man suffering from amyotrophic lateral sclerosis (ALS), communicated with the world using a sensor installed in his glasses. That sensor used tiny movements of a single muscle in his cheek to select characters on a screen. Once he typed a full sentence at a rate of roughly one word per minute, the text was synthesized into speech by a DECtalk TC01 synthesizer, which gave him his iconic, robotic voice. But a lot has changed since

Topics: brain davis speech text words

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These XR glasses gave me a 200-inch OLED screen to work with - and they're priced well

zdnet.com Matthew Miller 2026-02-22 03:30:15

ZDNET's key takeaways The RayNeo Air 3S is available for $269 These XR glasses provide advanced micro-OLED screens, dual speaker chamber design, and a 201-inch screen visual experience There are no light-blocking shades or electrochromic dimming capability, and productivity support is limited to native MacOS and Windows support. View now at Best Buy View now at Amazon more buying choices Just about every person to whom I demonstrate XR glasses ends up buying a pair for airline travel, commuti

Topics: 3s air experience glasses rayneo

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We ran a Unix-like OS on our home-built CPU with a home-built C compiler (2020)

news.ycombinator.com Likes Web 2026-02-21 04:20:08

How we ran a Unix-like OS (Xv6) on our home-built CPU with our home-built C compiler [Thanks for many comments and votes on Hacker News! ] It’s been two years since I started working as a software engineer. I sometimes tell my colleagues about a student project I did in my junior year of university, and it’s so well-received that I’m writing this post. Now, let me ask you a question. Have you ever designed your own ISA, built a processor of that ISA on FPGA, and built a compiler for it? Furth

Topics: cpu experiment group os xv6

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Generative AI's crippling failure to induce robust models of the world

news.ycombinator.com Gary Marcus 2026-02-22 00:43:54

Synthesized video from Dawid van Straaten, prompt (“Generate me a video of two men playing chess”) in which the player for black reaches across the table and, in the midst of a rather unusual position moves his opponent’s pawn horizontally, and quite illegally, several squares across the board. A few weeks ago, I had the singular honor of recording a podcast (to be released soon) with one of my heroes, Garry Kasparov, not only one of the greatest chess players of all time, but also one of the b

Topics: chess example model models world

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We ran a Unix-like OS Xv6 on our home-built CPU with a home-built C compiler (2020)

news.ycombinator.com Likes Web 2026-02-21 10:20:08

How we ran a Unix-like OS (Xv6) on our home-built CPU with our home-built C compiler [Thanks for many comments and votes on Hacker News! ] It’s been two years since I started working as a software engineer. I sometimes tell my colleagues about a student project I did in my junior year of university, and it’s so well-received that I’m writing this post. Now, let me ask you a question. Have you ever designed your own ISA, built a processor of that ISA on FPGA, and built a compiler for it? Furth

Topics: cpu experiment group os xv6

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Paleontologists Find Skeleton That Weirdly Looks Exactly Like Barney the Purple Dinosaur

futurism.com Unknown 2026-02-21 22:30:31

We're a happy fa-m-ily! Funky Dino Deep in the heart of Texas, a goofy-looking dinosaur skeleton has been unearthed — and it's got a funny head that makes it look like a dead wringer for Barney, the purple lizard of 90s television fame with the annoyingly cheery voice. As the Houston Chronicle reports, the dinosaur in question — called Eryops megacephalus — has a wide, grinning smile on a large flat skull that sits on four squat legs. Paleontologist Andre LuJan told the newspaper that he foun

Topics: dinosaur dinosaurs lujan skull texas

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Show HN: Vet – A tool for safely running remote shell scripts

news.ycombinator.com Unknown 2026-02-22 00:56:52

vet Don't just run it — vet it. Stop blindly piping to bash. vet lets you inspect remote scripts for changes, run them through a linter, and require your explicit approval before they can execute. The Problem We've all seen this pattern for installing software: curl -sSL https://example.com/install.sh | bash This is dangerous. The script could be malicious, the server could be compromised, or a transient network error could result in executing a partial script. The Solution vet wraps thi

Topics: approval explicit run script vet

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Are TikTok Age Tests Legit? Orthopedists Explains How to Measure Biological Age

cnet.com See Full Bio 2026-02-21 16:00:00

If you’ve scrolled through TikTok or Instagram, you’ve probably seen fitness challenges based on your biological age. In some cases, it’s funny to see people attempting feats that seem impossible for their age or impressive that they can do them. You’ve probably felt inspired to try out some of these challenges and even questioned their legitimacy. “Most of these challenges, like completing 11 consecutive push-ups (for women), doing pull-ups or performing a kneeling-to-squat jump, are quick scr

Topics: age biological exercise fitness said

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Amazon Is Building a Gigantic Computing Facility to Match the Human Brain

futurism.com Unknown 2026-02-21 23:45:20

But to what end? Fields of Data Indiana's newest cash crop isn't soybeans or corn; it's AI data centers — lots and lots of AI data centers. The New York Times reports that Amazon is building a vast complex of AI infrastructure facilities on top of 1,200 acres of former cropland, all meant for startup Anthropic's project to build an AI model that is as powerful, complex — and, just possibly, as intelligent — as the human brain. To that end, Amazon has constructed seven data centers on site, w

Topics: ai amazon complex data water

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We ran a Unix-like OS Xv6 on our home-built CPU with a home-built C compiler

news.ycombinator.com Likes Web 2026-02-21 22:20:08

How we ran a Unix-like OS (Xv6) on our home-built CPU with our home-built C compiler [Thanks for many comments and votes on Hacker News! ] It’s been two years since I started working as a software engineer. I sometimes tell my colleagues about a student project I did in my junior year of university, and it’s so well-received that I’m writing this post. Now, let me ask you a question. Have you ever designed your own ISA, built a processor of that ISA on FPGA, and built a compiler for it? Furth

Topics: cpu experiment group os xv6

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This Prehistoric Trick Shows How Ice Age People Harvested Teeth for Jewelry

gizmodo.com Ellyn Lapointe 2026-02-21 22:00:05

When piecing together the cultural practices of ancient humans, traditional archaeologists rely on clues from artifacts such as tools, bones, and pottery. Experimental archaeologists, however, go a step further—recreating past behaviors to experience how people once lived. That’s precisely what a team of researchers recently did to investigate how Stone Age communities in northeastern Europe extracted animal teeth to produce accessories. Led by Aija Macāne, a visiting scholar in the Department

Topics: extraction methods researchers teeth used

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Staples Union & Scale FlexFit Desk Converter Review: Reliable Riser

wired.com Julian Chokkattu 2026-02-21 23:03:00

The included keyboard rest is optional to install, though the whole thing is designed to work together. It's a little annoying. I wish you could roll the tray into the riser to hide it, which would go a long way in making the FlexFit look a little more elegant, and could also help with storage. You also can't adjust the height of the tray, so while I didn't have issues typing on a keyboard, I found my wrist cramping up a little when using my Apple Magic Trackpad because it was a little too low.

Topics: desk flexfit height little riser

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The Supreme Court just upended internet law, and I have questions

theverge.com Adi Robertson 2026-02-22 02:00:00

is a senior tech and policy editor focused on VR, online platforms, and free expression. Adi has covered video games, biohacking, and more for The Verge since 2011. Age verification is perhaps the hottest battleground for online speech, and the Supreme Court just settled a pivotal question: does using it to gate adult content violate the First Amendment in the US? For roughly the past 20 years the answer has been “yes” — now, as of Friday, it’s an unambiguous “no.” Justice Clarence Thomas’ opi

Topics: age sites states texas verification

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Spark AI (YC W24) is hiring a full-stack engineer in SF (founding team)

news.ycombinator.com Unknown 2026-02-22 16:01:03

About Us ⚡️ Join us to accelerate the energy transition with technology. At Spark, we’re building the AI engine behind the next generation of renewable energy infrastructure. Our mission is simple yet ambitious: To help renewable energy developers build solar farms, battery storage plants, and related projects more efficiently. If you’re excited to see your products directly accelerate the energy transition, read on. We’re already powering decision-making for industry leaders like Colliers En

Topics: ai building energy excited experience

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Only 2 exhibitor tables up for grabs at TechCrunch All Stage — claim by June 29

techcrunch.com Techcrunch Events 2026-02-22 21:15:00

This is not a drill. If your startup exists to power the growth of other startups or is the kind of innovation tech leaders need to see firsthand, your moment is now. TechCrunch All Stage hits Boston’s SoWa Power Station on July 15 — and just 2 exhibitor tables remain. Yes, only two, and only until June 29. Tables for TC All Stage have been flying, and this is truly your last chance to claim your place in front of founders and investors across all stages. Ways that exhibiting amplifies your br

Topics: brand exhibitor stage table tc

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Coinbase is the best-performing stock in the S&P 500 in June, and may have even more room to run

cnbc.com Tanaya Macheel 2026-02-23 02:38:21

People watch as the logo for Coinbase, the biggest U.S. cryptocurrency exchange, is displayed on the Nasdaq MarketSite jumbotron at Times Square in New York on April 14, 2021. Coinbase is the top performer in the S&P 500 in June, boosted by positive regulatory updates, product launches and, of course, its very inclusion in the benchmark stock index at the end of May. The crypto exchange's outperformance in the S&P 500 extends back to the April 8 market low, just after President Donald Trump's

Topics: 500 circle coinbase exchange stock

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A New Threads Feature Saves You From Seeing and Posting Spoilers: Here's How It Works

cnet.com See Full Bio 2026-02-23 02:18:18

Social media can accidentally spoil a streaming movie or show for those who haven't yet watched it. Threads, the popular social media platform from Meta, now has a new feature that could save you from spoiling your next watch. The new feature allows users to mark media and text posts as spoilers. If it's a photo, the spoiler will then appear blurred in feeds, and text will be grayed out. Clicking on both types makes the spoiler visible. Netflix and Marvel are the first major studios to use the

Topics: feature posts spoiler text threads

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Here’s where you can buy microSD Express cards for the Switch 2

theverge.com Cameron Faulkner 2026-02-23 00:46:12

is an editor covering deals and commerce. He joined in 2018, and served as commerce editor at Polygon until May 2025. The Nintendo Switch 2 is here, and so you might be in the market for a microSD card to store more games. While all microSD cards look the same, only microSD Express cards will work on the Switch 2 for storing and playing games. The card you used in your original Switch or Switch Lite will only offer very limited functionality if installed into Nintendo’s new handheld, letting yo

Topics: card cards express microsd switch

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Donald Trump is reportedly preparing a sweep of pro-AI executive orders

engadget.com Unknown 2026-02-23 11:18:56

We know what you’re thinking: there just isn’t enough AI around right now. Luckily for you, Donald Trump emphatically agrees. According to a new report from Reuters, his administration is assembling a number of executive actions that would significantly increase the energy supply used for expanding artificial intelligence. The US and China are currently battling it out to lead the way in the rapidly growing sector, but American companies will need more infrastructure to make the advances Trump w

Topics: ai build department executive trump

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SpaceX’s Starbase city officials silent on crane collapse

techcrunch.com Sean O'Kane 2026-02-23 11:58:17

A crane collapsed at SpaceX’s South Texas rocket facility this week, and the company’s newly-formed city won’t say if anyone was hurt. On June 23, a crane being used to clean up debris from the most recent SpaceX rocket explosion collapsed at the company’s launch complex. Footage of the accident was captured by Lab Padre, one of the content creators who film and photograph the site on a regular basis. But it was filmed from far away, making it impossible to tell whether anyone was harmed or in

Topics: city company spacex starbase techcrunch

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This Eufy robot vacuum is half off before Prime Day

engadget.com Unknown 2026-02-23 15:38:59

Engadget has been testing and reviewing consumer tech since 2004. Our stories may include affiliate links; if you buy something through a link, we may earn a commission. Read more about how we evaluate products . The Eufy 11S Max robot vacuum is on sale for $140 as part of an early Prime Day sale. That's half off, as the typical cost is $280 for this particular model. This is extremely close to a record-low price. This device made our list of the best budget-friendly robot vacuums. Perhaps the

Topics: amazon day deals extremely prime

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This Eufy robot vacuum is half for before Prime Day

engadget.com Unknown 2026-02-23 21:38:59

Engadget has been testing and reviewing consumer tech since 2004. Our stories may include affiliate links; if you buy something through a link, we may earn a commission. Read more about how we evaluate products . The Eufy 11S Max robot vacuum is on sale for $140 as part of an early Prime Day sale . That's half off, as the typical cost is $280 for this particular model. This is extremely close to a record-low price. This device made our list of the best budget-friendly robot vacuums . Perhaps t

Topics: amazon day deals extremely prime

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Finally, We’re Seeing More Ways to Quadruple Your Switch 2’s Paltry Storage

gizmodo.com Kyle Barr 2026-02-24 02:30:19

If you’re like me, your hungry Switch 2’s belly is already full up with a slate of launch games combined with your backlog of original Switch titles. When a growing number of games take up 60GB or more on your new handheld, you’ll want to look for extra storage options. Unfortunately, every option available right now costs close to half of what you already need to spend on Nintendo’s $450 handheld console. The Switch 2 only accepts microSD Express cards, not stock-standard microSD. Express-leve

Topics: card cards express microsd switch

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I ditched my phone for this E Ink handset for two weeks - here's my buying advice now

zdnet.com Matthew Miller 2026-02-24 20:00:21

ZDNET's key takeaways The Mudita Kompakt is available now for $439. The E Ink display is easy on the eyes, the battery lasts for days, and it satisfies the minimalist intention with far fewer distractions. The camera is unnecessary, there is no voice-to-text, and the display is too small to be an effective eBook reader. View now at Mudita Since I started covering mobile phones 20 years ago, I've watched them transform from simple devices to having an all-encompassing impact on our lives. It's

Topics: display kompakt mudita phone text

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SpaceX crane collapse in Texas being investigated by OSHA

cnbc.com Lora Kolodny 2026-02-25 00:27:43

The SpaceX Starbase industrial complex and rocket launch facility in Boca Chica, Texas, US, on Thursday, April 17, 2025. A SpaceX crane collapse at the company's Starbase, Texas facility on Tuesday has prompted an investigation by the Occupational Safety and Health Administration, the federal agency told CNBC in an email. The crane collapse was captured in a livestream by Lab Padre on YouTube, a SpaceX-focused channel. Clips from Lab Padre were widely shared on social media, including on X, wh

Topics: company federal musk nasa spacex

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Sailing the fjords like the Vikings yields unexpected insights

news.ycombinator.com Unknown 2026-02-20 18:56:02

Experimental archaeologist Greer Jarrett of Lund University in Sweden has been sailing in the footsteps of Vikings for the last three years. If you want to learn more about how and where the Vikings sailed, making the journey through the fjords yourself in replica boats is a practical, hands-on approach to achieving that end. Greer Jarrett, an archaeologist at Lund University in Sweden, has spent the last three years doing just that, sailing more than 5,000 kilometers along known Viking trade r

Topics: boats did experimental jarrett university

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Latest Tech News

LetsEncrypt – Expiration Notification Service Has Ended

Show HN: Summle – A little maths Game

NASA Continues Testing Multi-Billion Dollar Rocket While Trump Is Actively Trying to Cancel It

Performance Debugging with LLVM-mca: Simulating the CPU

A neural brain implant provides near instantaneous speech

These XR glasses gave me a 200-inch OLED screen to work with - and they're priced well

We ran a Unix-like OS on our home-built CPU with a home-built C compiler (2020)

Generative AI's crippling failure to induce robust models of the world

We ran a Unix-like OS Xv6 on our home-built CPU with a home-built C compiler (2020)

Paleontologists Find Skeleton That Weirdly Looks Exactly Like Barney the Purple Dinosaur

Show HN: Vet – A tool for safely running remote shell scripts

Are TikTok Age Tests Legit? Orthopedists Explains How to Measure Biological Age

Amazon Is Building a Gigantic Computing Facility to Match the Human Brain

We ran a Unix-like OS Xv6 on our home-built CPU with a home-built C compiler

This Prehistoric Trick Shows How Ice Age People Harvested Teeth for Jewelry

Staples Union & Scale FlexFit Desk Converter Review: Reliable Riser

The Supreme Court just upended internet law, and I have questions

Spark AI (YC W24) is hiring a full-stack engineer in SF (founding team)

Only 2 exhibitor tables up for grabs at TechCrunch All Stage — claim by June 29

Coinbase is the best-performing stock in the S&P 500 in June, and may have even more room to run

A New Threads Feature Saves You From Seeing and Posting Spoilers: Here's How It Works

Here’s where you can buy microSD Express cards for the Switch 2

Donald Trump is reportedly preparing a sweep of pro-AI executive orders

SpaceX’s Starbase city officials silent on crane collapse

This Eufy robot vacuum is half off before Prime Day

This Eufy robot vacuum is half for before Prime Day

Finally, We’re Seeing More Ways to Quadruple Your Switch 2’s Paltry Storage

I ditched my phone for this E Ink handset for two weeks - here's my buying advice now

SpaceX crane collapse in Texas being investigated by OSHA

Sailing the fjords like the Vikings yields unexpected insights

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