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Representing Python notebooks as dataflow graphs

This blog is adapted from our talk at PyCon 2025. marimo is free and open source, available on GitHub. For a free online experience with link sharing, try molab. marimo is a new kind of open-source Python notebook. While traditional notebooks are just REPLs, marimo notebooks are Python programs represented as dataflow graphs. This intermediate representation lets marimo blend the best parts of interactive computing with the reproducibility and reusability of Python software: every marimo notebo

The Day Novartis Chose Discovery

In 2002, Mark Fishman walked into a glass building in Cambridge with an unusual assignment: to turn the Swiss pharmaceutical company, Novartis, into the world’s greatest therapeutics research firm. More unusually still, Fishman was — at least on paper — precisely the wrong man for the job. The Harvard cardiologist had spent his career studying zebrafish hearts and teaching medical students. He had no pharmaceutical experience and no business training. And yet, Daniel Vasella — the physician-tur

This digital graffiti project is making the internet fun again, pixel by pixel - see for yourself

Screenshot by David Grober/ZDNET ZDNET's key takeaways Wplace is a site that lets you paint one pixel anywhere in the world every 30 seconds. Even though it's fairly new, it's exploded in popularity. You'll find artwork all over the world, warring groups, alliances, and more. If you miss Reddit's annual r/place experiment -- part collaborative project, part social experiment -- there's good news: It's back. At least a form of it is back on a website called Wplace. Like r/place, Wplace lets

iPhone 17 Pro Max: Three new upgrades that could be hard to resist

In just one month, Apple will unveil its full iPhone 17 lineup. The brand new Air model will get a lot of attention, but Apple also has big changes coming for iPhone 17 Pro Max. I’m tentatively planning to buy a 17 Air, but there are three Pro Max features in particular that could make Apple’s premium iPhone hard to resist. #1: Anti-reflective display I love a sunny day. More so than the average person, my mood depends heavily on how much sunshine there is, and my ability to get out and enjoy

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OpenAI returns old models to ChatGPT as Sam Altman admits ‘bumpy’ GPT-5 rollout

Want smarter insights in your inbox? Sign up for our weekly newsletters to get only what matters to enterprise AI, data, and security leaders. Subscribe Now OpenAI co-founder and CEO Sam Altman is publicly acknowledging major hiccups in yesterday’s rollout of GPT-5, the company’s new, flagship large language model (LLM) — advertised as its most powerful and capable yet. Answering user questions in a Reddit AMA (Ask Me Anything) thread and in a post on X this afternoon, Altman admitted to a ran

‘Citizen Toxie’ Is Troma at Its Filthy, Disgusting, Overtly Offensive Best

Troma boss Lloyd Kaufman has been out in force talking up Macon Blair’s The Toxic Avenger, a spirited reimagining of the studio’s 1984 cult classic set to irradiate a whole new generation when it hits theaters this month. But when io9 got a chance to talk to Kaufman at the recent San Diego Comic-Con, we had to ask: after watching Blair’s film, which other film in the vast Troma archives should a newly minted fan turn to next? “The fourth Toxic Avenger movie, Citizen Toxie,” Kaufman said without

Texas prepares for war as invasion of flesh-eating flies appears imminent

Texas is gearing up for war as a savage, flesh-eating fly appears poised for a US invasion and is expanding its range of victims. On Friday, the Texas Department of Agriculture announced the debut of TDA Swormlure, a synthetic bait designed to attract the flies with a scent that mimics open flesh wounds, which are critical to the lifecycle of the fly, called the New World Screwworm. The parasite exploits any open wound or orifice on a wide range of warm-blooded animals to feed its ravenous spaw

It Took Just 24 Hours of Complaints for OpenAI to Start Bringing Back Its Old Model

OpenAI unveiled its latest generative AI model, GPT-5, on Thursday. CEO Sam Altman says that ChatGPT is now like having a “superpower” and the equivalent of “a legitimate PhD-level expert in anything, any area you need, on demand, that can help you with whatever your goals are.” But after a day of playing around with it, many people are disappointed. Not only because GPT-5 still fumbles basic questions, but because it seems to be breaking a lot of workflows, according to complaints posted to Red

Zach Cregger’s Dream DC Movie Would Take After a Great ‘Batman’ Episode

Zach Cregger’s got Weapons out this weekend, but the man apparently never stops working. Not only is he working on a new Resident Evil movie, but he’s also cooked up an idea for DC Studios that we now know a little bit more about. According to the Hollywood Reporter’s Heat Vision newsletter, Cregger’s DC movie is currently known as Henchman. The pitch? The trade’s sources say a low-level goon in Gotham City manages to take down Batman thanks to “a stroke of luck,” after which he becomes the tal

Sam Altman addresses ‘bumpy’ GPT-5 rollout, bringing 4o back, and the ‘chart crime’

During a Reddit ask-me-anything session on Friday, OpenAI CEO Sam Altman and key members of the GPT-5 team were peppered with questions about the new model and requests to bring back its previous model, GPT-4o. They also asked Altman about the most embarrassing — and perhaps funniest — snafu in the presentation, the “chart crime.” One of the new features that GPT-5 rolled out is a real-time router that decides which model to use for a particular prompt, either responding quickly or taking addi

Trade Desk tanks 39% for worst day ever on CFO departure and competition from Amazon

In this article TTD Follow your favorite stocks CREATE FREE ACCOUNT Jeff Green, CEO of The Trade Desk. Scott Mlyn | CNBC Shares of The Trade Desk plummeted 39% on Friday, their worst day on record, after the ad-tech company announced the departure of its CFO and analysts expressed concerns about rising competition from Amazon . The Trade Desk, which went public in 2016, suffered its steepest prior drop in February, when the shares fell 33% on a revenue miss. In its second-quarter earnings repo

Google wants you charting your meme coins right on its Finance page

Edgar Cervantes / Android Authority TL;DR Google is testing a redesigned Finance page in the US with AI and advanced charts to track your investments. Traders will be able to access technical indicators and candlestick views directly on the platform. The update also includes real-time news, plus live market data for stocks, commodities, and more cryptocurrencies. Forget firing up five tabs to keep an eye on your favorite meme coins — Google wants you to do it all from its Finance page. The c

Disney 1985 film The Black Cauldron was an experiment that failed

Disney Animation's ambitious and innovative 1985 film The Black Cauldron was an experiment that dramatically failed, arguably putting the future of the studio in question. Disney Animation was on the lookout for a new identity in the 1980s. After half-a-century of success, this decade of the company's history is commonly referred to as the "Bronze" or "Dark Age", neither exactly a ringing endorsement of its films. Hope came in the form of The Black Cauldron, which seemed like the perfect way to

Efrit: A native elisp coding agent running in Emacs

Efrit - AI-Powered Emacs Coding Assistant A sophisticated AI coding agent that leverages Emacs' native programmability through direct Elisp evaluation. Overview Efrit is a conversational AI assistant that integrates seamlessly with Emacs, providing multiple interfaces for different types of tasks: efrit-chat - Multi-turn conversational interface for complex discussions and code development - Multi-turn conversational interface for complex discussions and code development efrit-do - Natural

Review: The Sandman S2 is a classic tragedy, beautifully told

I unequivocally loved the first season of The Sandman, the Netflix adaptation of Neil Gaiman's influential graphic novel series (of which I am longtime fan). I thought it captured the surreal, dream-like feel and tone of its source material, striking a perfect balance between the anthology approach of the graphic novels and grounding the narrative by focusing on the arc of its central figure: Morpheus, lord of the Dreaming. It's been a long wait for the second and final season, but S2 retains al

M5 MacBook Pro No Longer Coming in 2025

Apple does not plan to refresh any Macs with updated M5 chips in 2025, according to Bloomberg's Mark Gurman. Updated MacBook Air and MacBook Pro models are now planned for the first half of 2026. Gurman previously said that Apple would debut the M5 ‌MacBook Pro‌ models in late 2025, but his newest report suggests that Apple is "considering" pushing them back to 2026. Apple is now said to be "internally targeting" a launch early next year. The current M4, M4 Pro, and M4 Max ‌MacBook Pro‌ mode

‘Enterprise’ Producer Has Hopes Scott Bakula Might Return to ‘Star Trek’

Star Trek is in a bit of an uncertain place right now, as the shows that created its streaming boom have spent the last couple of years either coming to their end or announcing that they’re preparing to do so—and that’s even putting aside that Paramount itself is controversially about to come under new management. Beyond two and a half more seasons of Strange New Worlds and at least two seasons of Starfleet Academy, where Star Trek goes next is unknown. But it’s also a situation where one Trek a

Lurk – A Turing-complete programming language for ZK-SNARKs

Lurk Overview Lurk is a statically scoped dialect of Lisp, influenced by Scheme and Common Lisp. A reference implementation focused on describing and developing the core language can be found in the lurk-lisp repo. Lurk's distinguishing feature relative to most programming languages is that the correct execution of Lurk programs can be directly proved using SNARKs. The resulting proofs are succinct: they are relatively small, can be verified quickly, and they reveal only the information expli

What Should I Do With My OG Switch? Nintendo’s Wooden Amiibos Are the Answer

With a Switch 2 in tow, your original Switch is likely gathering dust. The sequel handheld is an upgrade—a spec bump. Nintendo is trying to give users a few more use cases for the older handheld, implying its first dockable handheld may end up being your child’s or younger cousin’s new toy. The Mario maker introduced a whole slew of new toys and Switch software explicitly geared toward kids. They’re all currently exclusive to Japan, though we can’t imagine western audiences wouldn’t jump on the

Sam Altman says he doesn’t think about Elon Musk that much

Sam Altman has dismissed longtime rival Elon Musk's warnings that OpenAI is set to dominate Microsoft, after the companies announced that OpenAI's latest AI model will be incorporated into Microsoft products. On Thursday, Microsoft CEO Satya Nadella announced that OpenAI's GPT-5 service would be launching across platforms including Microsoft 365 Copilot, Copilot, GitHub Copilot, and Azure AI Foundry — prompting a response from Musk that "OpenAI is going to eat Microsoft alive." Nadella sought

macOS Tahoe put your apps in icon jail? Here’s the fix

Yesterday I highlighted macOS Tahoe’s aggressive behavior of putting nonconforming app icons inside an ugly gray box of shame. The change seems to affect the Mac user experience more than it impacts the app developer. It makes the actual icon 20% smaller and 80% harder to recognize. A great thing about the Mac, though, is the ability to customize app icons. This can be a temporary solution. You just need to track down an app icon that works. Here’s how to swap out app icons on macOS Tahoe and a

Apple’s chip deal with Samsung is great news for future iPhones

One of the bullet points in Apple’s announcement of its increased US manufacturing spend made a big, but very non-specific, claim. Apple said that it was working with Samsung on an “innovative new technology which has never been used before anywhere in the world.” Although the company was being mysterious, we likely know what that means – and it’s great news not just for the iPhone 18, but also for future iPhones beyond it … The full statement – all two sentences of it – was as vague as it was

New iOS app takes the mystery out of HomeKit troubleshooting

HomeKit, Apple’s smart home framework, is great most of the time, and awfully frustrating when things go wrong. This new iOS app wants to change that. HomeCare for HomeKit HomeCare for HomeKit is designed as a complete toolkit for diagnosing and fixing smart home problems. At its core, it scans your entire setup to instantly identify devices that are unresponsive, slow, or running on low battery. Each failing device shows a “Last Time Online” timestamp to help pinpoint when trouble began. The

HomeKit Weekly: The ultimate HomeKit survival kit for dorm life

When I was in college, smart home technology was still something that was super futuristic. Today, that’s changed a lot. If I were starting college today, though, I’d bring a few HomeKit items to make dorm life more comfortable and functional. Between cramped desks, bad overhead lighting, and shared everything, a little automation can go a long way. Whether it’s turning off lights from bed or checking if your fan’s still running, here’s what I’d pack today if I were heading off to campus. Some

Nintendo's upcoming app lets kids smoosh Mario's face

Nintendo just announced a forthcoming app called Hello Mario! that's headed to iOS, Android and the Switch in Japan. The free app seems pretty basic, as it's just a giant Mario head that users can poke and prod. That sounds eerily reminiscent of the intro screen of Super Mario 64. The company says that Mario will react in various ways based on player input. His face will even turn "around and around on the screen" when manhandled. Nintendo says "parents and young children" should play together

Here's the absolutely massive Tamagotchi Paradise next to other objects in the wild, for scale

No product launch excites me more than the release of a new Tamagotchi. So when it comes time to review one, I like to first give myself a little while to just live with the device — to feel that initial delight and let it die down before I try to look at it critically. That way, I can more fairly assess whether we've actually got a toy that's worth the price tag and will hold a person's attention once the novelty wears off. But Tamagotchi Paradise arrived a few days ago, and while a proper rev

I clustered four Framework Mainboards to test LLMs

Framework casually mentioned they were testing a mini-rack AI cluster in their Framework Desktop presentation back in March. Imagine my surprise when Nirav Patel, Framework's founder and CEO, was at Open Sauce a couple weeks ago, and wanted to talk! He said they had seen my Project Mini Rack posts earlier this year and thought it was the perfect application to try out their new AMD Ryzen AI Max+ 395-powered Mainboard, as it's mini ITX dimensions fit inside a 10" rack. Framework sent over four

Meta Says ‘Big Wearable’ News Is Coming, but There’s Only One Thing I Want to Know

Meta has been on a pretty serious campaign to prove it’s at the cutting edge of consumer tech, and AI isn’t the only target on the board. AR/XR has also clearly been a priority if the last few weeks are any indication (see this paper in Nature about its wristband tech and drips on groundbreaking VR research for proof), and its vision on that front is starting to actually take shape. According to Meta CTO Andrew Bosworth, the company’s annual Connect conference in September, where it showcases t