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Here are the answers for The New York Times Mini Crossword for April 19.

ChatGPT, OpenAI’s text-generating AI chatbot, has taken the world by storm since its launch in November 2022. What started as a tool to supercharge productivity through writing essays and code with short text prompts has evolved into a behemoth with 300 million weekly active users. 2024 was a big year for OpenAI, from its partnership with Apple for its generative AI offering, Apple Intelligence, the release of GPT-4o with voice capabilities, and the highly-anticipated launch of its text-to-video model Sora. OpenAI also faced its share of internal drama, including the notable exits of high-level execs like co-founder and longtime chief scientist Ilya Sutskever and CTO Mira Murati. OpenAI has also been hit with lawsuits from Alden Global Capital-owned newspapers alleging copyright infringement, as well as an injunction from Elon Musk to halt OpenAI’s transition to a for-profit. In 2025, OpenAI is battling the perception that it’s ceding ground in the AI race to Chinese rivals like DeepSeek. The company has been trying to shore up its relationship with Washington as it simultaneously pursues an ambitious data center project, and as it reportedly lays the groundwork for one of the largest funding rounds in history. Below, you’ll find a timeline of ChatGPT product updates and releases, starting with the latest, which we’ve been updating throughout the year. If you have any other questions, check out our ChatGPT FAQ here. To see a list of 2024 updates, go here. Timeline of the most recent ChatGPT updates April 2025 OpenAI could “adjust” its safeguards if rivals release “high-risk” AI OpenAI said on Tuesday that it might revise its safety standards if “another frontier AI developer releases a high-risk system without comparable safeguards.” The move shows how commercial AI developers face more pressure to rapidly implement models due to the increased competition. OpenAI is currently in the early stages of developing its own social media platform to compete with Elon Musk’s X and Mark Zuckerberg’s Instagram and Threads, according to The Verge. It is unclear whether OpenAI intends to launch the social network as a standalone application or incorporate it into ChatGPT. OpenAI will remove its largest AI model, GPT-4.5, from the API, in July OpenAI will discontinue its largest AI model, GPT-4.5, from its API even though it was just launched in late February. GPT-4.5 will be available in a research preview for paying customers. Developers can use GPT-4.5 through OpenAI’s API until July 14; then, they will need to switch to GPT-4.1, which was released on April 14. OpenAI unveils GPT-4.1 AI models that focus on coding capabilities OpenAI has launched three members of the GPT-4.1 model — GPT-4.1, GPT-4.1 mini, and GPT-4.1 nano — with a specific focus on coding capabilities. It’s accessible via the OpenAI API but not ChatGPT. In the competition to develop advanced programming models, GPT-4.1 will rival AI models such as Google’s Gemini 2.5 Pro, Anthropic’s Claude 3.7 Sonnet, and DeepSeek’s upgraded V3. OpenAI will discontinue ChatGPT’s GPT-4 at the end of April OpenAI plans to sunset GPT-4, an AI model introduced more than two years ago, and replace it with GPT-4o, the current default model, per changelog. It will take effect on April 30. GPT-4 will remain available via OpenAI’s API. OpenAI could release GPT-4.1 soon OpenAI may launch several new AI models, including GPT-4.1, soon, The Verge reported, citing anonymous sources. GPT-4.1 would be an update of OpenAI’s GPT-4o, which was released last year. On the list of upcoming models are GPT-4.1 and smaller versions like GPT-4.1 mini and nano, per the report. OpenAI has updated ChatGPT to use information from your previous conversations OpenAI started updating ChatGPT to enable the chatbot to remember previous conversations with a user and customize its responses based on that context. This feature is rolling out to ChatGPT Pro and Plus users first, excluding those in the U.K., EU, Iceland, Liechtenstein, Norway, and Switzerland. OpenAI is working on watermarks for images made with ChatGPT It looks like OpenAI is working on a watermarking feature for images generated using GPT-4o. AI researcher Tibor Blaho spotted a new “ImageGen” watermark feature in the new beta of ChatGPT’s Android app. Blaho also found mentions of other tools: “Structured Thoughts,” “Reasoning Recap,” “CoT Search Tool,” and “l1239dk1.” OpenAI offers ChatGPT Plus for free to U.S., Canadian college students OpenAI is offering its $20-per-month ChatGPT Plus subscription tier for free to all college students in the U.S. and Canada through the end of May. The offer will let millions of students use OpenAI’s premium service, which offers access to the company’s GPT-4o model, image generation, voice interaction, and research tools that are not available in the free version. ChatGPT users have generated over 700M images so far More than 130 million users have created over 700 million images since ChatGPT got the upgraded image generator on March 25, according to COO of OpenAI Brad Lightcap. The image generator was made available to all ChatGPT users on March 31, and went viral for being able to create Ghibli-style photos. OpenAI’s o3 model could cost more to run than initial estimate The Arc Prize Foundation, which develops the AI benchmark tool ARC-AGI, has updated the estimated computing costs for OpenAI’s o3 “reasoning” model managed by ARC-AGI. The organization originally estimated that the best-performing configuration of o3 it tested, o3 high, would cost approximately $3,000 to address a single problem. The Foundation now thinks the cost could be much higher, possibly around $30,000 per task. OpenAI CEO says capacity issues will cause product delays In a series of posts on X, OpenAI CEO Sam Altman said the company’s new image-generation tool’s popularity may cause product releases to be delayed. “We are getting things under control, but you should expect new releases from OpenAI to be delayed, stuff to break, and for service to sometimes be slow as we deal with capacity challenges,” he wrote. March 2025 OpenAI plans to release a new ‘open’ AI language model OpeanAI intends to release its “first” open language model since GPT-2 “in the coming months.” The company plans to host developer events to gather feedback and eventually showcase prototypes of the model. The first developer event is to be held in San Francisco, with sessions to follow in Europe and Asia. OpenAI removes ChatGPT’s restrictions on image generation OpenAI made a notable change to its content moderation policies after the success of its new image generator in ChatGPT, which went viral for being able to create Studio Ghibli-style images. The company has updated its policies to allow ChatGPT to generate images of public figures, hateful symbols, and racial features when requested. OpenAI had previously declined such prompts due to the potential controversy or harm they may cause. However, the company has now “evolved” its approach, as stated in a blog post published by Joanne Jang, the lead for OpenAI’s model behavior. OpenAI adopts Anthropic’s standard for linking AI models with data OpenAI wants to incorporate Anthropic’s Model Context Protocol (MCP) into all of its products, including the ChatGPT desktop app. MCP, an open-source standard, helps AI models generate more accurate and suitable responses to specific queries, and lets developers create bidirectional links between data sources and AI applications like chatbots. The protocol is currently available in the Agents SDK, and support for the ChatGPT desktop app and Responses API will be coming soon, OpenAI CEO Sam Altman said. OpenAI’s viral Studio Ghibli-style images could raise AI copyright concerns The latest update of the image generator on OpenAI’s ChatGPT has triggered a flood of AI-generated memes in the style of Studio Ghibli, the Japanese animation studio behind blockbuster films like “My Neighbor Totoro” and “Spirited Away.” The burgeoning mass of Ghibli-esque images have sparked concerns about whether OpenAI has violated copyright laws, especially since the company is already facing legal action for using source material without authorization. OpenAI expects revenue to triple to $12.7 billion this year OpenAI expects its revenue to triple to $12.7 billion in 2025, fueled by the performance of its paid AI software, Bloomberg reported, citing an anonymous source. While the startup doesn’t expect to reach positive cash flow until 2029, it expects revenue to increase significantly in 2026 to surpass $29.4 billion, the report said. ChatGPT has upgraded its image-generation feature OpenAI on Tuesday rolled out a major upgrade to ChatGPT’s image-generation capabilities: ChatGPT can now use the GPT-4o model to generate and edit images and photos directly. The feature went live earlier this week in ChatGPT and Sora, OpenAI’s AI video-generation tool, for subscribers of the company’s Pro plan, priced at $200 a month, and will be available soon to ChatGPT Plus subscribers and developers using the company’s API service. The company’s CEO Sam Altman said on Wednesday, however, that the release of the image generation feature to free users would be delayed due to higher demand than the company expected. OpenAI announces leadership updates Brad Lightcap, OpenAI’s chief operating officer, will lead the company’s global expansion and manage corporate partnerships as CEO Sam Altman shifts his focus to research and products, according to a blog post from OpenAI. Lightcap, who previously worked with Altman at Y Combinator, joined the Microsoft-backed startup in 2018. OpenAI also said Mark Chen would step into the expanded role of chief research officer, and Julia Villagra will take on the role of chief people officer. OpenAI’s AI voice assistant now has advanced feature OpenAI has updated its AI voice assistant with improved chatting capabilities, according to a video posted on Monday (March 24) to the company’s official media channels. The update enables real-time conversations, and the AI assistant is said to be more personable and interrupts users less often. Users on ChatGPT’s free tier can now access the new version of Advanced Voice Mode, while paying users will receive answers that are “more direct, engaging, concise, specific, and creative,” a spokesperson from OpenAI told TechCrunch. OpenAI and Meta have separately engaged in discussions with Indian conglomerate Reliance Industries regarding potential collaborations to enhance their AI services in the country, per a report by The Information. One key topic being discussed is Reliance Jio distributing OpenAI’s ChatGPT. Reliance has proposed selling OpenAI’s models to businesses in India through an application programming interface (API) so they can incorporate AI into their operations. Meta also plans to bolster its presence in India by constructing a large 3GW data center in Jamnagar, Gujarat. OpenAI, Meta, and Reliance have not yet officially announced these plans. OpenAI faces privacy complaint in Europe for chatbot’s defamatory hallucinations Noyb, a privacy rights advocacy group, is supporting an individual in Norway who was shocked to discover that ChatGPT was providing false information about him, stating that he had been found guilty of killing two of his children and trying to harm the third. “The GDPR is clear. Personal data has to be accurate,” said Joakim Söderberg, data protection lawyer at Noyb, in a statement. “If it’s not, users have the right to have it changed to reflect the truth. Showing ChatGPT users a tiny disclaimer that the chatbot can make mistakes clearly isn’t enough. You can’t just spread false information and in the end add a small disclaimer saying that everything you said may just not be true.” OpenAI upgrades its transcription and voice-generating AI models OpenAI has added new transcription and voice-generating AI models to its APIs: a text-to-speech model, “gpt-4o-mini-tts,” that delivers more nuanced and realistic sounding speech, as well as two speech-to-text models called “gpt-4o-transcribe” and “gpt-4o-mini-transcribe”. The company claims they are improved versions of what was already there and that they hallucinate less. OpenAI has launched o1-pro, a more powerful version of its o1 OpenAI has introduced o1-pro in its developer API. OpenAI says its o1-pro uses more computing than its o1 “reasoning” AI model to deliver “consistently better responses.” It’s only accessible to select developers who have spent at least $5 on OpenAI API services. OpenAI charges $150 for every million tokens (about 750,000 words) input into the model and $600 for every million tokens the model produces. It costs twice as much as OpenAI’s GPT-4.5 for input and 10 times the price of regular o1. Noam Brown, who heads AI reasoning research at OpenAI, thinks that certain types of AI models for “reasoning” could have been developed 20 years ago if researchers had understood the correct approach and algorithms. OpenAI says it has trained an AI that’s “really good” at creative writing OpenAI CEO Sam Altman said, in a post on X, that the company has trained a “new model” that’s “really good” at creative writing. He posted a lengthy sample from the model given the prompt “Please write a metafictional literary short story about AI and grief.” OpenAI has not extensively explored the use of AI for writing fiction. The company has mostly concentrated on challenges in rigid, predictable areas such as math and programming.might not be that great at creative writing at all. OpenAI rolled out new tools designed to help developers and businesses build AI agents — automated systems that can independently accomplish tasks — using the company’s own AI models and frameworks. The tools are part of OpenAI’s new Responses API, which enables enterprises to develop customized AI agents that can perform web searches, scan through company files, and navigate websites, similar to OpenAI’s Operator product. The Responses API effectively replaces OpenAI’s Assistants API, which the company plans to discontinue in the first half of 2026. OpenAI reportedly plans to charge up to $20,000 a month for specialized AI ‘agents’ OpenAI intends to release several “agent” products tailored for different applications, including sorting and ranking sales leads and software engineering, according to a report from The Information. One, a “high-income knowledge worker” agent, will reportedly be priced at $2,000 a month. Another, a software developer agent, is said to cost $10,000 a month. The most expensive rumored agents, which are said to be aimed at supporting “PhD-level research,” are expected to cost $20,000 per month. The jaw-dropping figure is indicative of how much cash OpenAI needs right now: The company lost roughly $5 billion last year after paying for costs related to running its services and other expenses. It’s unclear when these agentic tools might launch or which customers will be eligible to buy them. ChatGPT can directly edit your code The latest version of the macOS ChatGPT app allows users to edit code directly in supported developer tools, including Xcode, VS Code, and JetBrains. ChatGPT Plus, Pro, and Team subscribers can use the feature now, and the company plans to roll it out to more users like Enterprise, Edu, and free users. ChatGPT’s weekly active users doubled in less than 6 months, thanks to new releases According to a new report from VC firm Andreessen Horowitz (a16z), OpenAI’s AI chatbot, ChatGPT, experienced solid growth in the second half of 2024. It took ChatGPT nine months to increase its weekly active users from 100 million in November 2023 to 200 million in August 2024, but it only took less than six months to double that number once more, according to the report. ChatGPT’s weekly active users increased to 300 million by December 2024 and 400 million by February 2025. ChatGPT has experienced significant growth recently due to the launch of new models and features, such as GPT-4o, with multimodal capabilities. ChatGPT usage spiked from April to May 2024, shortly after that model’s launch. February 2025 OpenAI cancels its o3 AI model in favor of a ‘unified’ next-gen release OpenAI has effectively canceled the release of o3 in favor of what CEO Sam Altman is calling a “simplified” product offering. In a post on X, Altman said that, in the coming months, OpenAI will release a model called GPT-5 that “integrates a lot of [OpenAI’s] technology,” including o3, in ChatGPT and its API. As a result of that roadmap decision, OpenAI no longer plans to release o3 as a standalone model.  ChatGPT may not be as power-hungry as once assumed A commonly cited stat is that ChatGPT requires around 3 watt-hours of power to answer a single question. Using OpenAI’s latest default model for ChatGPT, GPT-4o, as a reference, nonprofit AI research institute Epoch AI found the average ChatGPT query consumes around 0.3 watt-hours. However, the analysis doesn’t consider the additional energy costs incurred by ChatGPT with features like image generation or input processing. OpenAI now reveals more of its o3-mini model’s thought process In response to pressure from rivals like DeepSeek, OpenAI is changing the way its o3-mini model communicates its step-by-step “thought” process. ChatGPT users will see an updated “chain of thought” that shows more of the model’s “reasoning” steps and how it arrived at answers to questions. You can now use ChatGPT web search without logging in OpenAI is now allowing anyone to use ChatGPT web search without having to log in. While OpenAI had previously allowed users to ask ChatGPT questions without signing in, responses were restricted to the chatbot’s last training update. This only applies through ChatGPT.com, however. To use ChatGPT in any form through the native mobile app, you will still need to be logged in. OpenAI unveils a new ChatGPT agent for ‘deep research’ OpenAI announced a new AI “agent” called deep research that’s designed to help people conduct in-depth, complex research using ChatGPT. OpenAI says the “agent” is intended for instances where you don’t just want a quick answer or summary, but instead need to assiduously consider information from multiple websites and other sources. January 2025 OpenAI used a subreddit to test AI persuasion OpenAI used the subreddit r/ChangeMyView to measure the persuasive abilities of its AI reasoning models. OpenAI says it collects user posts from the subreddit and asks its AI models to write replies, in a closed environment, that would change the Reddit user’s mind on a subject. The company then shows the responses to testers, who assess how persuasive the argument is, and finally OpenAI compares the AI models’ responses to human replies for that same post.  OpenAI launches o3-mini, its latest ‘reasoning’ model OpenAI launched a new AI “reasoning” model, o3-mini, the newest in the company’s o family of models. OpenAI first previewed the model in December alongside a more capable system called o3. OpenAI is pitching its new model as both “powerful” and “affordable.” ChatGPT’s mobile users are 85% male, report says A new report from app analytics firm Appfigures found that over half of ChatGPT’s mobile users are under age 25, with users between ages 50 and 64 making up the second largest age demographic. The gender gap among ChatGPT users is even more significant. Appfigures estimates that across age groups, men make up 84.5% of all users. OpenAI launches ChatGPT plan for US government agencies OpenAI launched ChatGPT Gov designed to provide U.S. government agencies an additional way to access the tech. ChatGPT Gov includes many of the capabilities found in OpenAI’s corporate-focused tier, ChatGPT Enterprise. OpenAI says that ChatGPT Gov enables agencies to more easily manage their own security, privacy, and compliance, and could expedite internal authorization of OpenAI’s tools for the handling of non-public sensitive data. More teens report using ChatGPT for schoolwork, despite the tech’s faults Younger Gen Zers are embracing ChatGPT, for schoolwork, according to a new survey by the Pew Research Center. In a follow-up to its 2023 poll on ChatGPT usage among young people, Pew asked ~1,400 U.S.-based teens ages 13 to 17 whether they’ve used ChatGPT for homework or other school-related assignments. Twenty-six percent said that they had, double the number two years ago. Just over half of teens responding to the poll said they think it’s acceptable to use ChatGPT for researching new subjects. But considering the ways ChatGPT can fall short, the results are possibly cause for alarm. OpenAI says it may store deleted Operator data for up to 90 days OpenAI says that it might store chats and associated screenshots from customers who use Operator, the company’s AI “agent” tool, for up to 90 days — even after a user manually deletes them. While OpenAI has a similar deleted data retention policy for ChatGPT, the retention period for ChatGPT is only 30 days, which is 60 days shorter than Operator’s. OpenAI launches Operator, an AI agent that performs tasks autonomously OpenAI is launching a research preview of Operator, a general-purpose AI agent that can take control of a web browser and independently perform certain actions. Operator promises to automate tasks such as booking travel accommodations, making restaurant reservations, and shopping online. Operator, OpenAI’s agent tool, could be released sooner rather than later. Changes to ChatGPT’s code base suggest that Operator will be available as an early research preview to users on the $200 Pro subscription plan. The changes aren’t yet publicly visible, but a user on X who goes by Choi spotted these updates in ChatGPT’s client-side code. TechCrunch separately identified the same references to Operator on OpenAI’s website. OpenAI tests phone number-only ChatGPT signups OpenAI has begun testing a feature that lets new ChatGPT users sign up with only a phone number — no email required. The feature is currently in beta in the U.S. and India. However, users who create an account using their number can’t upgrade to one of OpenAI’s paid plans without verifying their account via an email. Multi-factor authentication also isn’t supported without a valid email. ChatGPT now lets you schedule reminders and recurring tasks ChatGPT’s new beta feature, called tasks, allows users to set simple reminders. For example, you can ask ChatGPT to remind you when your passport expires in six months, and the AI assistant will follow up with a push notification on whatever platform you have tasks enabled. The feature will start rolling out to ChatGPT Plus, Team, and Pro users around the globe this week. New ChatGPT feature lets users assign it traits like ‘chatty’ and ‘Gen Z’ OpenAI is introducing a new way for users to customize their interactions with ChatGPT. Some users found they can specify a preferred name or nickname and “traits” they’d like the chatbot to have. OpenAI suggests traits like “Chatty,” “Encouraging,” and “Gen Z.” However, some users reported that the new options have disappeared, so it’s possible they went live prematurely. FAQs: What is ChatGPT? How does it work? ChatGPT is a general-purpose chatbot that uses artificial intelligence to generate text after a user enters a prompt, developed by tech startup OpenAI. The chatbot uses GPT-4, a large language model that uses deep learning to produce human-like text. When did ChatGPT get released? November 30, 2022 is when ChatGPT was released for public use. What is the latest version of ChatGPT? Both the free version of ChatGPT and the paid ChatGPT Plus are regularly updated with new GPT models. The most recent model is GPT-4o. Can I use ChatGPT for free? There is a free version of ChatGPT that only requires a sign-in in addition to the paid version, ChatGPT Plus. Who uses ChatGPT? Anyone can use ChatGPT! More and more tech companies and search engines are utilizing the chatbot to automate text or quickly answer user questions/concerns. What companies use ChatGPT? Multiple enterprises utilize ChatGPT, although others may limit the use of the AI-powered tool. Most recently, Microsoft announced at its 2023 Build conference that it is integrating its ChatGPT-based Bing experience into Windows 11. A Brooklyn-based 3D display startup Looking Glass utilizes ChatGPT to produce holograms you can communicate with by using ChatGPT.  And nonprofit organization Solana officially integrated the chatbot into its network with a ChatGPT plug-in geared toward end users to help onboard into the web3 space. What does GPT mean in ChatGPT? GPT stands for Generative Pre-Trained Transformer. What is the difference between ChatGPT and a chatbot? A chatbot can be any software/system that holds dialogue with you/a person but doesn’t necessarily have to be AI-powered. For example, there are chatbots that are rules-based in the sense that they’ll give canned responses to questions. ChatGPT is AI-powered and utilizes LLM technology to generate text after a prompt. Can ChatGPT write essays? Yes. Can ChatGPT commit libel? Due to the nature of how these models work, they don’t know or care whether something is true, only that it looks true. That’s a problem when you’re using it to do your homework, sure, but when it accuses you of a crime you didn’t commit, that may well at this point be libel. We will see how handling troubling statements produced by ChatGPT will play out over the next few months as tech and legal experts attempt to tackle the fastest moving target in the industry. Does ChatGPT have an app? Yes, there is a free ChatGPT mobile app for iOS and Android users. What is the ChatGPT character limit? It’s not documented anywhere that ChatGPT has a character limit. However, users have noted that there are some character limitations after around 500 words. Does ChatGPT have an API? Yes, it was released March 1, 2023. What are some sample everyday uses for ChatGPT? Everyday examples include programming, scripts, email replies, listicles, blog ideas, summarization, etc. What are some advanced uses for ChatGPT? Advanced use examples include debugging code, programming languages, scientific concepts, complex problem solving, etc. How good is ChatGPT at writing code? It depends on the nature of the program. While ChatGPT can write workable Python code, it can’t necessarily program an entire app’s worth of code. That’s because ChatGPT lacks context awareness — in other words, the generated code isn’t always appropriate for the specific context in which it’s being used. Can you save a ChatGPT chat? Yes. OpenAI allows users to save chats in the ChatGPT interface, stored in the sidebar of the screen. There are no built-in sharing features yet. Are there alternatives to ChatGPT? Yes. There are multiple AI-powered chatbot competitors such as Together, Google’s Gemini and Anthropic’s Claude, and developers are creating open source alternatives. How does ChatGPT handle data privacy? OpenAI has said that individuals in “certain jurisdictions” (such as the EU) can object to the processing of their personal information by its AI models by filling out this form. This includes the ability to make requests for deletion of AI-generated references about you. Although OpenAI notes it may not grant every request since it must balance privacy requests against freedom of expression “in accordance with applicable laws”. The web form for making a deletion of data about you request is entitled “OpenAI Personal Data Removal Request”. In its privacy policy, the ChatGPT maker makes a passing acknowledgement of the objection requirements attached to relying on “legitimate interest” (LI), pointing users towards more information about requesting an opt out — when it writes: “See here for instructions on how you can opt out of our use of your information to train our models.” What controversies have surrounded ChatGPT? Recently, Discord announced that it had integrated OpenAI’s technology into its bot named Clyde where two users tricked Clyde into providing them with instructions for making the illegal drug methamphetamine (meth) and the incendiary mixture napalm. An Australian mayor has publicly announced he may sue OpenAI for defamation due to ChatGPT’s false claims that he had served time in prison for bribery. This would be the first defamation lawsuit against the text-generating service. CNET found itself in the midst of controversy after Futurism reported the publication was publishing articles under a mysterious byline completely generated by AI. The private equity company that owns CNET, Red Ventures, was accused of using ChatGPT for SEO farming, even if the information was incorrect. Several major school systems and colleges, including New York City Public Schools, have banned ChatGPT from their networks and devices. They claim that the AI impedes the learning process by promoting plagiarism and misinformation, a claim that not every educator agrees with. There have also been cases of ChatGPT accusing individuals of false crimes. Where can I find examples of ChatGPT prompts? Several marketplaces host and provide ChatGPT prompts, either for free or for a nominal fee. One is PromptBase. Another is ChatX. More launch every day. Can ChatGPT be detected? Poorly. Several tools claim to detect ChatGPT-generated text, but in our tests, they’re inconsistent at best. Are ChatGPT chats public? No. But OpenAI recently disclosed a bug, since fixed, that exposed the titles of some users’ conversations to other people on the service. What lawsuits are there surrounding ChatGPT? None specifically targeting ChatGPT. But OpenAI is involved in at least one lawsuit that has implications for AI systems trained on publicly available data, which would touch on ChatGPT. Are there issues regarding plagiarism with ChatGPT? Yes. Text-generating AI models like ChatGPT have a tendency to regurgitate content from their training data.

iPhones and Android phones are under attack.

Amazon’s inaugural launch of its Project Kuiper internet satellites on April 9 turned out to be nothing of the sort when poor weather conditions prompted the mission team to postpone liftoff. Up until Thursday, we’d heard nothing from Amazon and United Launch Alliance (ULA) — the operator of the Atlas V rocket carrying the satellites to orbit — about a new target launch date. But on Friday, they finally revealed a schedule. Recommended Videos “Kuiper 1, the launch of a ULA Atlas V 551 rocket carrying the first production satellites for Amazon’s Project Kuiper, is now planned for April 28,” ULA said in a post on social media. Related It continued: “The launch is scheduled for 7 p.m. ET at the opening of a two-hour window, from Space Launch Complex-41 at Cape Canaveral Space Force Station, Florida,” adding: “This launch begins a new chapter in the commercial launch industry as Amazon partners with ULA to deliver the first batch of their advanced satellites to low-Earth orbit (LEO).” With Project Kuiper, one of Amazon’s goals is to take on SpaceX’s Starlink internet service, which started in 2019 and now provides broadband connectivity to individuals and businesses via a growing constellation of small satellites.  Amazon’s April 28 mission will deploy 27 Project Kuiper satellites to orbit — the maximum number of Kuiper satellites that ULA’s Atlas V rocket can carry in a single deployment.  For subsequent missions, Amazon will also use ULA’s newer Vulcan rocket, which can carry as many as 45 Kuiper satellites in one flight, as well as the New Glenn, a new heavy-lift rocket operated by Blue Origin. Amazon is planning to build a constellation of around 3,200 Project Kuiper satellites by 2029. This will be enough to offer global broadband coverage, giving it a chance to compete with SpaceX’s Starlink service.  In a letter to shareholders in 2023, Amazon chief Andy Jassy said that Kuiper is our low-Earth orbit “aims to provide broadband connectivity to the 400-500 million households who don’t have it today (as well as governments and enterprises seeking better connectivity and performance in more remote areas),” describing it as “a very large revenue opportunity for Amazon.” If you’re interested to watch the the inaugural launch toward the end of April, Digital Trends has everything you need to know. Editors’ Recommendations

Which end is up? To regenerate a head, you first have to know where your tail is Planaria can't replace a missing head until after the tail develops sufficiently. John Timmer – Apr 18, 2025 2:40 pm | 3 Credit: NNehring Credit: NNehring Story text Size Small Standard Large Width * Standard Wide Links Standard Orange * Subscribers only   Learn more For those of us whose memory of high school biology hasn't faded entirely, planarians will probably sound very familiar. They're generally used as an example of one of the extreme ends of regenerative capacity. While some animals like mammals have a limited ability to regenerate lost tissues, planarians can be cut roughly in half and regenerate either an entire head or entire tail, depending on which part of the body you choose to keep track of. In doing so, they have to re-establish something that is typically only needed early in an animal's development: a signaling system that helps tell cells where the animal's head and tail are. Now, a US-based team asked a question that I'd never have thought of: What happens if you cut the animal in half early in development, while the developmental head-to-tail signaling system is still active? The answer turned out to be surprisingly complex. Heads or tails? Planarians are small flatworms that would probably be living quiet lives somewhere if biologists hadn't discovered their ability to regenerate lots of adult tissues when damaged. The process has been well-studied by this point and involves the formation of a cluster of stem cells, called a blastema, at the site of damage. From there, many of the signals that control the formation of specialized tissues in the embryo get re-activated, directing the stem cells down the developmental pathways needed to reproduce any lost organs. Critical to this process is a signaling system that helps inform the animal of where its head is. Signaling molecules called wnts help developing embryos form what's called the anterior-posterior axis by telling the animal where its posterior resides. If it's needed, wnt signaling may also be reactivated during regeneration after the loss of major portions of the animal, inducing the blastema to form new tail structures. That reactivation takes place in the animal's muscle, which appears to be a key tissue in the process of sensing the damage and inducing regeneration. The question being asked here is what happens if the damage that induces regeneration happens while the animal is still developing at a time when wnt signaling is normally patterning the animal's organs. To find out, the researchers started taking planarian embryos (from the species named Schmidtea polychroa) and slicing them in half. Before a critical point in development, the animals failed to close the wound made by the cut, causing the two embryo halves to simply spew cells out into the environment. Somewhat later, however, there was excellent survival, and the head portion of the embryo could regenerate a tail segment. This tells us that the normal signaling pathways present in the embryo are sufficient to drive the process forward. But the tail of the embryo at this stage doesn't appear to be capable of rebuilding its head. But the researchers found that they could inhibit wnt signaling in these posterior fragments, and that was enough to allow the head to develop. Lacking muscle One possibility here is that wnt signaling is widely active in the posterior of the embryo at this point, blocking formation of anterior structures. Alternatively, the researchers hypothesize that the problem is with the muscle cells that normally help organize the formation of a stem-cell-filled blastema, which is needed to kick off the regeneration process. Since the anterior end of the embryo develops earlier, they suggest there may simply not be enough muscle cells in the tail to kick off this process at early stages of development. To test their hypothesis, they performed a somewhat unusual experiment. They started by cutting off the tails of embryos and saving them for 24 hours. At that point, they cut the front end off tails, creating a new wound to heal. At this point, regeneration proceeded as normal, and the tails grew a new head. This isn't definitive evidence that muscle cells are what's missing at early stages, but it does indicate that some key developmental step happens in the tail within the 24-hour window after the first cut. The results reinforce the idea that regeneration of major body parts requires the re-establishment of the signals that lay out organization of the embryo in development—something that gets complicated if those signals are currently acting to organize the embryo. And it clearly shows that the cells needed to do this reorganization aren't simply set aside early on in development but instead take some time to appear. All of that information will help clarify the bigger-picture question of how these animals manage such a complex regeneration process. Current Biology, 2025. DOI: 10.1016/j.cub.2025.03.065  (About DOIs). John Timmer Senior Science Editor John Timmer Senior Science Editor John is Ars Technica's science editor. He has a Bachelor of Arts in Biochemistry from Columbia University, and a Ph.D. in Molecular and Cell Biology from the University of California, Berkeley. When physically separated from his keyboard, he tends to seek out a bicycle, or a scenic location for communing with his hiking boots. 3 Comments

This article is part of a special series celebrating the 100th anniversary of the birth of quantum theory. Read more here The seeds of quantum theory were sown by Albert Einstein and others as early as 1905. But the theory came together properly 100 years ago in 1925 – and has exerted its influence ever since, as this timeline shows. > 1905 Riffing on earlier work by Max Planck, Albert Einstein suggests that light is made of particles with certain energies. These “quanta of light” were an early step on the road to quantum theory. > 1913 Niels Bohr produces a quantum description of the atom in which electrons can only exist in certain orbits with fixed energies. > 1919 Physicist Hendrika Johanna van Leeuwen writes a thesis proposing that magnetism is also a quantum mechanical phenomenon. > 1925 On the windswept island of Helgoland, Werner Heisenberg carries out a calculation that treats the electron’s characteristics not as single values, but as tables of values. In this, his supervisor, Max Born, spots a key truth of quantum mechanics (see “Carlo Rovelli on what we get wrong about the origins of quantum theory”). > 1926 Erwin Schrödinger develops an alternative quantum framework that paints electrons as waves using a mathematical construct called the wave function. > 1935 Schrödinger devises a thought experiment in which a cat in a closed box may be considered both alive and dead while it is unobserved. Einstein, Nathan Rosen and Boris Podolsky write a paper on quantum entanglement, which links two particles even when separated by…

Dave Filoni took the stage at Star Wars Celebration, ostensibly for a look back at season one of Ahsoka—but the main attraction was, of course, the first concrete news regarding season two of the Rosario Dawson-starring series. Fans have been waiting for updates since the emotional and open-ended season one finale back in late 2023, and Filoni finally delivered the goods. Inspired by retro adverts for A New Hope‘s sequel before anything had been filmed for Empire Strikes Back, the new teaser for season 2, the new trailer was made entirely of concept art for the season, with voiceover narration teasing the coming battle between the New Republic and the Imperial Remnant. The tease included glimpses of fleet battles between New Republic and Remnant ships, with Ezra suiting up alongside New Republic pilots to take the fight to the Empire. Meanwhile, in the other galaxy where Ahsoka and Sabine stayed after season one, we saw shots of the Master and Padawan exploring ancient ruins, and fighting giant, old droid guardians, with narration teasing a final confrontation with Baylan Skoll to culminate their journey. “The imperial remnant is gaining in power,” the narration says. “Who will be able to stop them? In the continuation of the Star Wars series, our heroes must confront enemies in two different galaxies as they battle the forces of evil. In the course of the odyssey, we return to old friends … and battle ancient machines from a dark and terrible past. Culminating in an awesome confrontation between Ahsoka Tano and the Fallen Jedi Knight, Baylen Skoll.” Other intriguing shots included David Tennant’s droid Huyang squaring off with Shin Hati (seemingly splitting his arms into multiples akin to Grievous, a saber in each hand), and Chopper blasting away with a massive repeater cannon. The trailer also confirmed that Rebels‘ Zeb Orrelios, after his live-action debut in The Mandalorian, would finally be reunited with his animated compatriots. Ahsoka‘s first season ran for eight episodes and explored not only the life of Dawson’s Ahsoka Tano—spinning off the character’s life-action debut in The Mandalorian—but also fellow Star Wars Rebels heroes Sabine Wren (Natasha Liu Bordizzo), Hera Syndulla (Mary Elizabeth Winstead), and Ezra Bridger (Eman Esfandi). It also brought Grand Admiral Thrawn (Lars Mikkelsen) to live-action for the first time, and featured the return of Hayden Christensen as future Darth Vader Anakin Skywalker. The Star Wars Celebration panel confirmed the news that Game of Thrones star Rory McCann will take over the role of former Jedi Baylan Skoll, stepping in for the late Ray Stevenson, who portrayed the character in season one. Further teases included the fact that Admiral Ackbar will appear in the season, going “head to head” with Thrawn, and Hayden Christensen will reprise his role as the chosen one, Anakin Skywalker. Want more io9 news? Check out when to expect the latest Marvel, Star Wars, and Star Trek releases, what’s next for the DC Universe on film and TV, and everything you need to know about the future of Doctor Who.

Construction and Renovation of Shanghai University Yanchang Campus / ECADISave this picture!Courtesy of ECADIUniversity, Renovation•Shanghai, China Architects: ECADI Area Area of this architecture project Area:  73006 m² Year Completion year of this architecture project Year:  2023 Manufacturers Brands with products used in this architecture project Manufacturers:  成功科技(嘉兴)有限公司Save this picture! Text description provided by the architects. The Shanghai University Yanchang Road Campus spans 19.2 hectares, featuring new constructions and renovations within the existing architectural complex. The project includes clusters for the College of Art, College of Film, and an experimental training base for film production and cultural exchange, forming an integrated art education complex with functions including research, teaching, experimentation, training, exhibition, and communication.Save this picture!Save this picture!The campus renovation locates at the middle of the campus, adding up to 73,000 m² of total floor areas. It focuses on harmonizing old and new structures. Adopting a "strategic infill development and vertical expansion" approach, the design retains well-preserved existing buildings, and respects the original campus layout while introducing modern vitality. New buildings blend modestly with historical surroundings to echo the campus heritage and depict the cultural identities of the two colleges.Save this picture!Save this picture!The architectural form of Film College reflects the logical relationship between internal functions and spatial organization. The base volume characterized by red brick walls harmonizes with the old campus through its warm color palette, material texture, and compatible architectural scale. The lobby and communal spaces feature expansive window systems that integrate external landscapes into interior environments, creating a cohesive campus vista.Save this picture!Save this picture!The upper suspended volume of the Film College is supported by six core tubes and steel trusses, achieving cantilevered structures and flexible open-floor layout. These steel trusses simultaneously generate distinctive spatial effects within the building. The horizontally extended U-shaped glass volume floats above the existing campus, establishing a dialogue with its surroundings through innovative architectural language.Save this picture!Save this picture!The diverse height requirements of various disciplines of the Art College are addressed through a split-level layout, which integrates interconnected atria, grand staircases, and ramps to create a gallery-like circulation path within the building. The design not only resolves functional height disparities but also fosters an interactive layered environment that encourages collaborative learning and creative researching.Save this picture!The interwoven spatial hierarchy naturally translates into a rhythmically articulated facade. Situated in a bustling urban area, the campus aims to drive cultural and industrial development in its vicinity, transforming itself into an open and shared hub that merges with the city's cultural and creative ecosystem.Save this picture! Project gallerySee allShow less Project locationAddress:Jing'an District, Shanghai, ChinaLocation to be used only as a reference. It could indicate city/country but not exact address.About this officeECADIOffice••• MaterialsMaterials and TagsPublished on April 19, 2025Cite: "Construction and Renovation of Shanghai University Yanchang Campus / ECADI" 19 Apr 2025. ArchDaily. Accessed . <https://www.archdaily.com/1029092/construction-and-renovation-of-shanghai-university-yanchang-campus-ecadi&gt ISSN 0719-8884Save想阅读文章的中文版本吗?上海大学延长校区建设改造项目 / 和·建筑设计工作室是否 You've started following your first account!Did you know?You'll now receive updates based on what you follow! Personalize your stream and start following your favorite authors, offices and users.Go to my stream

Nature, Published online: 16 April 2025; doi:10.1038/d41586-025-01258-xScientists have captured a colossal squid in the deep sea for the first time. Plus, crows have surprising geometry skills and the world now has a plan in place for pandemics.