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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

ChatGPT comes with personality presets now - and 3 other upgrades you might have missed

Elyse Betters Picaro / ZDNET ZDNET's key takeaways: OpenAI launched ChatGPT customization updates. Users can choose chat color and personality. All users (even free) can now access Advanced Voice Mode. OpenAI is having one of its biggest product launch weeks, releasing its highly anticipated open-source models, gpt-oss-120b and gpt-oss-20b, and GPT-5. Buried within the deluge of the large language models (LLMs) are helpful ChatGPT features that add customization options that could make the

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

Truth Social’s New AI Chatbot Is Donald Trump’s Media Diet Incarnate

When I ask the new Truth Social AI chatbot about navigating bias in the media ecosystem, it gives what I view as pretty reasonable advice. “Diversify your sources,” it responds. “Rely on news outlets across the political spectrum, including those from both left-leaning and right-leaning perspectives.” This is advice that the AI itself may not be taking to heart. For instance, to come to the above answer it cites five sources, four of which are Fox News articles. The fifth, inexplicably, is a 4

This epic Severance mural might be the coolest thing you see all week

LA is populated with marketing materials for all sorts of entertainment, but this giant painted Severance mural is one-of-a-kind. Apple shared photos of “The Exalted Victory of Cold Harbor” mural on display near an Apple TV+ billboard on Melrose Avenue in Los Angeles this week. The finishing touches were put on the mural at the end of July, according to passersby on social media. These are the shots shared by Apple, including a selfie by Severance lead actor Adam Scott: Meanwhile, a Facebook

Truth Social's New AI Chatbot Is Donald Trump's Media Diet Incarnate

When I ask the new Truth Social AI chatbot about navigating bias in the media ecosystem, it gives what I view as pretty reasonable advice. “Diversify your sources,” it responds. “Rely on news outlets across the political spectrum, including those from both left-leaning and right-leaning perspectives.” This is advice that the AI itself may not be taking to heart. For instance, to come to the above answer it cites five sources, four of which are Fox News articles. The fifth, inexplicably, is a 4

Nintendo designed a Playdate-like crank for the Switch 2

Nintendo has eyed adding a Playdate-style crank to the Switch 2, according to a recently spotted patent from Nintendo Patents Watch. The hypothetical accessory would add tracking rotational movement to an existing bag of Joy-Con 2 controller tricks that includes motion and mouse controls. Based on the patent application, the crank accessory attaches to the side of a Joy-Con 2 magnetically, not unlike the controllers' wrist straps. Whichever game supports the accessory can use the Joy-Con 2's mo

Texas politicians warn Smithsonian it must not lobby to retain its space shuttle

Texas lawmakers, seemingly not content with getting NASA's endorsement to move a retired space shuttle to Houston, are now calling for an investigation into how the Smithsonian allegedly objected to relocating the orbiter it has owned for more than a decade. Senator John Cornyn and Representative Randy Weber on Thursday sent a letter to John Roberts, the Smithsonian Institution's chancellor and chief justice of the United States, suggesting that the Smithsonian's staff may have violated the law

Inspector General Probing FAA’s Handling of D.C. Airspace After Thousands of Close Calls

Nearly eight months after a deadly collision occurred near Ronald Reagan Washington National Airport in Washington, D.C., the Transportation Department’s Office of Inspector General announced Friday that it would open a probe into the Federal Aviation Administration’s handling of the airspace around the international airport. The inciting incident for the investigation was the midair crash that occurred this January when a US Army Black Hawk helicopter collided with an American Airlines regiona

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

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

It’s getting harder to skirt RTO policies without employers noticing

Companies are monitoring whether employees adhere to corporate return-to-office (RTO) policies and are enforcing the requirements more than they have in the past five years, according to a report that commercial real estate firm CBRE will release next week and that Ars Technica reviewed. CBRE surveyed 184 companies for its report. Among companies surveyed, 69 percent are monitoring whether employees come into the office as frequently as policy mandates. That’s an increase from 45 percent last y

Someone keeps stealing, flying, fixing and returning this man's 1958 Cessna

Jason Hong, 75, has had his 1958 Cessna Skyhawk stolen, and returned, multiple times in the last couple of months, but he and police have no idea who has been taking the colorful plane. While Jason Hong was celebrating his 75th birthday, he suddenly found himself thinking about his 1958 Cessna Skyhawk, a white and red single-engine beauty with colorful stripes that he calls his “old treasure.” He doesn’t fly it much anymore, but given the occasion he resolved to visit his plane as soon as he c

Intel CEO Responds to Trump’s Threat

Intel CEO Lip-Bu Tan has responded to President Donald Trump’s call for his resignation over alleged conflicts of interest. In a memo sent to staff on Thursday, Tan said those concerns are based on “misinformation.” Tan joined the struggling chipmaker back in March. He was in the middle of trying to get the company back on track when he found himself in Trump’s crosshairs. “The CEO of INTEL is highly CONFLICTED and must resign, immediately. There is no other solution to this problem,” Trump wr

A Bug at Social Security Admin Has Been Rerouting Phone Calls to Random Offices

A technical issue at the Social Security Administration recently caused phone calls to various field offices to be routed to other offices that didn’t have jurisdiction over the claims, thus making service fulfillment difficult. On Tuesday, NPR reported that the agency’s field offices were having difficulties connecting callers to the proper staff who could fulfill their requests. “If it’s someone else’s office, the jurisdiction is someone else’s,” Angela Digeronimo, a SS claims specialist in W

New Gel Could Heal Stubborn Diabetic Wounds in Under 2 Weeks

For people with diabetes, high blood sugar can damage blood vessels and nerves, leading to chronic wounds that stay open for months. But a new gel-based treatment could massively speed up the healing process for people with diabetes, allowing wounds to close in just days, according to a new study. The new treatment targets thrombospondin-1 (TSP-1), a protein that inhibits the growth of new blood vessels, a crucial step in the healing process. Targeting this protein increased new blood vessel fo

The Tesla Cybertruck May Have Found Its True Calling: Military Target Practice

Table of Contents The Tesla Cybertruck May Have Found Its True Calling: Military Target Practice The Tesla Cybertruck inspires strong opinions. People either love or hate the shiny, sharp-angled trucks, many of which have been vandalized and even shot with paintball guns as a reaction against Tesla CEO and former Trump administration staffer Elon Musk. So this one's for you, Cybertruck haters: The Air Force recently had 33 vehicles, including two Cybertrucks, delivered to the White Sands Missi

Intel CEO responds to 'misinformation' and Trump threat in letter to employees

Lip-Bu Tan, CEO of Intel, appears at an event organized by the company. Intel CEO Lip-Bu Tan addressed "misinformation" about his previous roles after President Donald Trump called for his resignation and raised ethical concerns. " I want to be absolutely clear: Over 40+ years in the industry, I've built relationships around the world and across our diverse ecosystem – and I have always operated within the highest legal and ethical standards," he wrote in a memo to employees on Thursday. Tan

Topics: ceo intel lip tan trump

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

Someone keeps stealing, flying, fixing and returning this man's plane. But why?

Jason Hong, 75, has had his 1958 Cessna Skyhawk stolen, and returned, multiple times in the last couple of months, but he and police have no idea who has been taking the colorful plane. While Jason Hong was celebrating his 75th birthday, he suddenly found himself thinking about his 1958 Cessna Skyhawk, a white and red single-engine beauty with colorful stripes that he calls his “old treasure.” He doesn’t fly it much anymore, but given the occasion he resolved to visit his plane as soon as he c

Facebook and Instagram may be down for some users

Meta is apparently experiencing some capacity of server issues today. According to Downdetector, user reports of Facebook and Instagram not refreshing have spiked recently. Meta hasn’t acknowledged any outage on its system status page yet, and Facebook appears to be loading fine here. But if you’re having issues loading either app today, Downdetector shows that you’re not alone. ❗️Can't refresh your feed or messages on Facebook and Instagram? You're not alone! Downdetector users have been

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

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

Add the Tesla Diner to the List of Elon Musk Projects That Fail to Deliver on Promises

You are not going to believe this, because there is absolutely zero precedent for it happening; it appears Elon Musk has overpromised on something. It has only been two weeks since the Tesla Diner, a charging station and restaurant with a retro-futuristic aesthetic, and it is already significantly narrowing down its menu offerings, according to a report from Eater. In classic diner fashion, the restaurant offered a robust menu when it first opened, but it is down to just five sandwiches, two si

Voice Controlled Swarms

Inspired by Command School from Enders Game, let’s make swarms that we can control with our voice! We will do this by having a voice-to-text program feed our voice commands into an LLM, and then that LLM can run a bunch of commands to control the swarm. Below is the final result. Your browser does not support the video tag. And we will make this in two parts: First we will create a general voice-controller that can plug into any application that supports the Model Context Protocol (MCP). As

Deals: iPad mini 7 $120 off from $379, black Magic Mouse, M4 iPad Pro, Mac mini, and more

Today’s 9to5Toys Lunch Break is finishing the week off with the return of all-time low pricing across the latest iPad mini 7 lineup at $120 off with deals starting from $379 shipped. Those offers join the new all-time lows on the M3 iPad Air lineup at $150 off – the best price ever offered on Apple’s most affordable current-gen M series iPad – as well as $200 off the least pricey M4 iPad Pro, and a rare deal on the black USB-C Apple Magic Mouse. But with the massive Apple deal week event now liv

Topics: apple deals ipad m4 price

Google Finance redesign goes all in on AI, complete with a chatbot

The Google Finance web app is getting a major overhaul with an emphasis on AI . This redesign includes an AI-powered chatbot, which will answer finance-based queries and provide relevant links. Here's hoping the chatbot will keep hallucinations to a minimum , given that people use the app to make financial decisions with real world consequences. The platform is also introducing new charting tools that the company says should help users understand asset performance. There will be options to view

Google Working on Fix for Glum Gemini, Stuck in 'Infinite Loop' of Self-Esteem Issues

Maybe Google Gemini needs to take some PTO. The company's large language AI model, which is increasingly spreading across Google's many services and products, has been saying some things lately that are leading users to worry: Does Gemini have low self esteem? A series of posts on social media showing some of the self-critical responses Gemini has given users show a disturbing pattern. For instance, in one screenshot, Gemini admits it can't solve a coding problem and concludes, "I have failed.

Texas politicians warn Smithsonian it must not lobby to retain its space shuttle

Texas lawmakers, seemingly not content with getting NASA's endorsement to move a retired space shuttle to Houston, are now calling for an investigation into how the Smithsonian allegedly objected to relocating the orbiter it has owned for more than a decade. Senator John Cornyn and Representative Randy Weber on Thursday sent a letter to John Roberts, the Smithsonian Institution's chancellor and chief justice of the United States, suggesting that the Smithsonian's staff may have violated the law