ARC will be a tokamak that hosts fusion between hydrogen’s two heavier isotopes, deuterium and tritium. This reaction results in a helium nucleus and releases a neutron and radiation. The helium transfers heat to the plasma, maintaining the conditions needed for fusion, but it is otherwise a waste product, referred to as “ash” in the fusion context. The neutron and radiation, however, are put to use. Part of that use is simply imparting energy into a blanket of molten salt that surrounds the fusion chamber. That energy, in the form of heat, will be used to drive a turbine that produces the electricity. The molten salt includes lithium ions; when one lithium isotope absorbs a neutron, it decays into more helium, plus tritium that can be used as fuel for the reactor. There are isotopes present that will also release additional neutrons, allowing this process to generate sufficient fuel.

Overall, the present design of ARC is expected to produce about 1.13 GW of fusion power, with 500 MW of that extracted as electricity. Some of that (100 MW) will be needed to power the plant’s operations, leaving 400 MW to be sent to the grid. The rest of the energy is either kept in the tokamak to maintain the fusion reactions or lost due to inefficiencies in the heat and energy transfer of the system. There’s a lot of uncertainty about these numbers; the 1.13 GW is just the center of a range of potential values running from 900 MW to 1.3 GW, so the 400 MW output may need to be adjusted up or down accordingly.

Some of that 400 MW comes during periods where fusion is not occurring. The nuclear reactions will occur within 15-minute-long periods that will be interspersed with one minute resets. The resets are meant to be kept short enough that nothing has much of a chance to cool down before it gets heated up again — thermal inertia will let it continue generating power. That will be one of the key differentiators with SPARC, which doesn’t have the heat extraction needed to maintain stable fusion for these long time periods, and so can’t maintain the near constant temperatures needed for reliable power generation.

It’s inevitable that parts of the device will be exposed to radiation and perhaps fusion plasma. The inner walls of the reactor will be shielded by tungsten, which will limit erosion by the conditions. Meanwhile, the vacuum vessel is designed to be replaced every one to two years. The papers note that this flexibility will allow them to make some design changes even after ARC is built. To enable this, the whole tokamak is meant to split in half for maintenance.

Randy Bresnik, Luca Parmitano, Frank Rubio and Andre Douglas are expected to launch into Earth orbit next year, with the goal of testing two commercially developed lunar landers that are slated to carry astronauts to the surface of the moon during the Artemis IV mission in 2028. Bresnik will be the mission’s commander, with Parmitano, an Italian astronaut with the European Space Agency, serving as the pilot. Douglas and Rubio will be mission specialists, and Bob Hines will train with the crew as a backup member. “This test flight will enable us to prove we can carry out highly choreographed operations with our partners across hardware interfaces, software propulsion systems and life support elements with crew in the high-stakes space environment,” Jeremy Parsons, NASA’s Artemis program manager, said during NASA’s announcement on Tuesday.

Bresnik has been to the International Space Station twice, most recently as commander of an expedition in 2017. A retired U.S. Marine colonel, he was selected as a NASA astronaut in 2004. Bresnik has helped oversee development and testing of spacecraft for the Artemis program as an assistant to the chief of the Astronaut Office, which manages astronaut training and operations. Parmitano has also done two stints on the ISS and served as commander of an expedition in 2019. He has completed a total of six spacewalks and also performed the first live DJ set in orbit. Before becoming an astronaut, Parmitano was a test pilot for the Italian air force.

For Rubio, a physician with 28 years of service in the Army, Artemis III will be his second trip to space. From 2022 to 2023, he spent 371 days on the space station, breaking the record for longest-duration spaceflight by an American, according to NASA. Douglas is the only crew member making his spaceflight debut. An engineer who previously worked on space exploration and robotics at Johns Hopkins University Applied Physics Lab, he became a NASA astronaut in 2022. Douglas was the backup crew member for the Artemis II mission around the moon earlier this year. He told NBC News in an interview after Tuesday’s announcement that the role had at times been a challenge. “It was hard to figure out how do you balance getting ready to go, not go, all that stuff,” he said. “But to go now is just fantastic.”

The Federal Communications Commission (FCC) wants to make it effectively impossible for people to buy what many call burner phones — a phone not explicitly linked to your identity at the point of purchase — which would impact privacy-conscious people, to domestic abuse survivors, to journalists, and many more. The FCC plans to do this by legally forcing the country’s telecoms to store a wealth of personal information about essentially all phone customers, including a government issued identification number and their physical address, alarming privacy advocates and civil rights activists who compare the measures to those from authoritarian countries where it can be difficult to buy a mobile phone plan without giving up your identity.

The proposed change would drastically shake up how people obtain phone plans in the U.S., and have all sorts of privacy and cybersecurity knock-on effects. The FCC is proposing the data collection partly as a way to combat scammers, with telecoms being required to collect other information on business and foreign customers like the intended use case of their bulk phone plan purchase and their IP address. But the changes would mean telecoms collect data on all new and renewing customers, and the FCC provides a long list of other things that the collected data could help authorities with.

In a synopsis of the proposed changes, the FCC writes, “Specifically, we seek comment on requiring originating providers to, at a minimum, obtain and retain the name, physical address, government issued identification number, and an alternate telephone number of any new and renewing customer before granting access to its services.” The goal of collecting this data, the FCC writes, is to deter some scammers from getting onto a telecom network in the first place, and so “enforcers will be better able to identify the scammers when they do.” The FCC compares the changes to the sort of data collected by banks to prevent money laundering.

One section stresses that the newly collected data would help “law enforcement to more easily identify callers that use the network to perpetuate crimes by ensuring that voice providers have accurate and complete customer information.” It goes on to ask if the data would help identify people buying and selling illicit goods; the investigation of “fraud, espionage, or influence operations that undermine national security”, and “address abuse in text messaging networks.” “Criminals continue to leverage the anonymity provided by phone calls and texts to defraud Americans and exploit communications networks to further other crimes,” one section reads.

Created in 2021 by a congressional mandate, the list (PDF) seeks to identify Chinese companies that the Pentagon considers to have links to the Chinese military — not only those directly controlled by the Chinese military and security forces but also those contributing to the country’s defense industrial base. When updating the list last year, the Pentagon said the Chinese military sought to acquire advanced technologies and expertise developed by Chinese companies, universities and research programs that “appear to be civilian entities.”

The Chinese Embassy on Monday accused the U.S. of “overstretching the concept of national security and making discriminatory lists to go after Chinese companies.” It said Chinese companies observe the laws and regulations of the countries where they do business. “The U.S. should stop its wrong practice and create a fair, just and non-discriminatory environment for Chinese companies,” the embassy said in a statement. […] The Chinese Embassy on Monday accused the U.S. of “overstretching the concept of national security and making discriminatory lists to go after Chinese companies.” It said Chinese companies observe the laws and regulations of the countries where they do business. “The U.S. should stop its wrong practice and create a fair, just and non-discriminatory environment for Chinese companies,” the embassy said in a statement.

The EU said it began its investigation, in December 2025, after Meta banned third-party general-purpose AI assistants from the WhatsApp for Business API. It said that appeared to be an abuse of Meta’s dominant position in European markets. So, as an interim measure as its investigation continues, it has given Meta five working days to re-instate access for third-party general-purpose AI assistants to the WhatsApp for Business API under the same terms and conditions that were in place previously.

“In rapidly evolving markets, competition can be lost long before a final decision is adopted,” said Teresa Ribera, the Commission’s executive vice-president for clean, just and competitive transition. “This is why these interim measures will remain in place for the duration of the investigation.” She added the decision “preserved choice for citizens across Europe on the AI assistants they want to use with WhatsApp, without that decision being made for them.” The Commission said if Meta failed to comply with its interim decision it could be fined up to 10% up of its total turnover.

[W]ith the launch of Claude Fable 5, Anthropic is honoring its stated “eventual goal” to deploy Mythos-class models at scale. It’s also capitalizing on growing momentum and investor interest in its technology ahead of a potentially massive IPO, which is expected to take place as soon as this year. Anthropic said Claude Fable 5 shows “exceptional performance” across software engineering and knowledge work tasks. On some benchmarks, it scored more than 10% higher than Claude Opus 4.8, another model the company announced late last month, according to a blog post.

Claude Fable 5 represents a “significant jump” in capability, which is why Anthropic had to implement additional guardrails to prevent misuse, Penn said. If a user asks a high-risk question, like how to make ricin, a toxin, for instance, the model will block its response and fall back to Claude Opus 4.8 to deliver a safe answer. “What we wanted to do was to be very intentional about building new types of classifiers and new types of safety guardrails in place for this launch,” Penn said.

Researchers have analyzed a high-severity vulnerability in Linux that’s able to escalate untrusted users to root by exploiting a bug you don’t often see: a single errant character inside the kernel. The vulnerability, tracked as CVE-2026-23111, is located in nf_tables, a subsystem of the Linux kernel that provides packet filtering capabilities. It’s used to manage firewall rules and replaces older subsystems such as iptables, ip6tables, arptables, and ebtables.

The presence of a single mis-issued exclamation point in code implementing nf_tables introduced a use-after-free, a class of vulnerability that corrupts memory by placing malicious code at memory addresses that haven’t been properly freed of their previous contents. CVE-2026-23111 can be exploited by an unprivileged user or process to elevate system rights to root. The exploit works by disrupting the deletion of verdicts — a determination within the nf_tables framework that determines if a packet matches a rule calling for a certain action to be performed. This process can use what are known as catchall elements, which act as a wildcard in the event a lookup doesn’t match any other element in the set.

When a verdict map is deleted from memory, catchall elements are deactivated and a chain’s reference counter is decremented. When errors occur the deletion can be reversed and the counter incremented. CVE-2026-53111 allows for that process to be altered. As a result, the exploit can decrement the variable an arbitrary number of times and then delete and free the chain when some objects still point to it.

Commission spokesperson Thomas Regnier told reporters in Brussels: “The decision not to roll out Siri AI in the EU is Apple’s and Apple’s only. Apple was simply unable to develop interoperability solutions that meet essential EU privacy and security standards. Instead of trying to find a suitable compliance solution, Apple simply made a request to the European Commission to be exempted from their interoperability obligations. That’s not an option.”

Craig Federighi, Apple’s senior vice president of Software Engineering, said the company was “deeply disappointed” and cited what it described as regulators’ refusal to accept any of Apple’s proposals, including a system called Trusted System Agent that would have allowed third-party virtual assistants to safely access the same device capabilities as Siri AI.

The Commission’s account tells a different story. Rather than negotiating over Apple’s proposed solutions, regulators say Apple simply requested a blanket exemption from its interoperability obligations under the Digital Markets Act, something the Commission says is not an available option. Apple’s statement framed the DMA’s requirements as demanding that any AI system be given “nearly unlimited access” to a user’s device.

For example, Meta says if you bought a tent online recently, you might see camping-related videos in your Reels feed. “We aren’t collecting any new data as part of this update,” the blog post says. “This is about using information that businesses already send to us to further improve your experience.”

Meta spokesperson Emil Vazquez tells The Verge that the company previously only used the activity across its apps, such as likes, views, and follows, to tailor the content you see. The company also started using conversations with its AI assistant to personalize ads last year.

Microsoft has shut down a wave of its own repositories on GitHub, including those related to Azure and AI coding agents, as it investigates a data breach, according to research from cybersecurity researchers and a statement given to 404 Media by Microsoft. Hackers planted malware that would harvest peoples’ credentials when they opened it in AI coding tools like Claude Code or Gemini CLI, according to one set of researchers. The exact contours of the breach are unclear, but researchers say Microsoft has disabled more than 70 of its own repositories, and pointed to a particular package that was previously compromised.

Last week, cybersecurity website OpenSourceMalware.com, which acts as a clearing house for indicators of supply chain attacks so defenders can secure their own networks, and which also publishes its own write-ups, wrote about the mass disabling of Microsoft GitHub repositories. “GitHub disabled 73 Microsoft repositories across four of its GitHub organizations — the entire Azure Functions org, the whole Durable Task family, and a row of AI sample apps — in a 105-second sweep on June 5,” the website wrote on Friday. Is it very unusual for any company, let alone Microsoft, to disable so many of its own repositories in one go. They include 49 related to Azure, Microsoft’s cloud computing arm, and some concerning AI agents. The shutdown repositories also include ones related to durabletask, a Microsoft development tool.

Researchers from StepSecurity wrote on Friday that the GitHub closures came after a malicious commit was pushed to the durabletask repository. That attack planted configuration files that would harvest peoples’ credentials when they opened the repository in Claude Code, Gemini CLI, Cursor, or VS Code, StepSecurity wrote.

The rollout won’t happen overnight. NHS England said that each trust will receive a central allocation of licenses based on headcount, typically starting with around 2,000 Copilot seats, and that more than half a million staff are expected to have access by October 2026. The NHS has no shortage of administrative work to throw at the software. The rollout envisions Copilot helping with discharge paperwork, bed management, rota planning, meeting minutes, board papers, briefings, data analysis, and assorted HR, finance, and procurement tasks.

NHS organizations will also receive access to Copilot Studio, Microsoft’s toolkit for building custom AI agents. NHS England said trusts will be able to develop agents for tasks such as handling Freedom of Information requests, processing complaints, reducing helpdesk workloads, and assisting with financial analysis. A governance framework called Agent 365 will oversee the deployment of those systems.

“Today, I am calling on tech companies operating in this country to introduce vice controls that prevent children from sending and receiving sexually explicit images. Because this is not an impossible challenge,” he said. “If they choose not, then we will act and we will change the law.” […] Under the changes, sexual predators will be prevented from being able to exploit and abuse victims through their devices, and children stopped from being able to access pornography, the Home Office said. Adults will still be able to take, share or view nude content once they have verified their age.

In the Commons, Melanie Ward, the Labour MP for Cowdenbeath and Kirkcaldy, said: “It’s time to stop asking social media companies to make their products safe, and instead time to start requiring them to do so through regulation.” Clive Efford, the Labour MP for Eltham and Chislehurst, said the “sociopaths” running social media platforms had no concern for the welfare of children. “The only message that they’re going to listen to is if there’s legislation put before this house that is going to act and send a clear message to them.” The proposal is designed to sit alongside the Online Safety Act, which requires companies to have processes for removing material that is illegal or harmful to children.

The discovery came from an investigation detailed in a June 2 preprint paper by Todd Humphreys and his student Zach Clements at The University of Texas at Austin, along with Argyris Krizise at Stanford University in California. By sifting through public data from ground-based stations with global navigation satellite system (GNSS) receivers, they identified a pattern of high-powered interference lasting less than 10 seconds each time but simultaneously detectable by ground stations across Europe from Norway to Spain to Poland, and even reaching as far west as Greenland and Canada.

By analyzing the ground station data from January 2019 to April 2026, the researchers found 75 days with at least one widespread GNSS interference event overlapping with the GPS L1 frequency band centered on 1575.42 megahertz. That represents the main band used for signal transmission by the US-made GPS satellite constellation and GNSS constellations from other countries. Such interference patterns happened mostly on Tuesdays, Wednesdays, and Thursdays during business hours in Europe, Humphreys told the YouTube channel Veritasium. Because such “continental-scale” interference was simultaneously affecting GPS receivers across Europe and beyond, Humphreys and his colleagues calculated that the source had to be at least 1,200 kilometers above the Earth.

[…] In the Veritasium video, Humphreys speculated that the Russians may have been testing the satellites’ GPS interference capabilities only briefly on a neighboring frequency adjacent to the typical GPS band. “And then in the eventual future when there is a hot conflict, they go ahead and tune their transmitter down to the GPS band, but it’s much more damaging now that it lies right on that band,” he said. Incidentally, the raw data also revealed a second interference burst from the Russian satellites in a lower-frequency band used by China’s BeiDou navigation system. “I can no longer say this is accidental with confidence,” Humphreys told Veritasium. He also described the Russian satellites’ quiet demonstration as a “massive escalation in the electronic warfare background conflict that is going on right now.”

The investigation consulted over 20 independent battery experts, including Julian Zanau from the Fraunhofer Research Institute, Dr. Yahim San from Justus-Liebig University, Tom Bicha from Leona, and Dr. Yuo Hesca from Seinajoki University of Applied Sciences. Every single one confirmed the tested cell is lithium-ion. There are two key pieces of evidence. First, the voltage curves from VTT testing match high-nickel lithium-ion cells (NCM chemistry). The cell sits at 3.7-3.8 volts at 50% state of charge — right where lithium-ion cells operate. Sodium-ion cells don’t go significantly past 3.5 volts at 50% SOC.

The second piece of evidence is even more damning: VTT’s cell expansion data. When a battery charges, ions squeeze into the anode material, causing it to expand in a predictable pattern. A graphite anode produces a distinctive “kink” in the expansion curve around 50-70% state of charge, caused by how ions reorder themselves in graphite’s layered structure. The Donut Lab cell shows exactly that kink.

This is critical because sodium ions are physically too large to fit into graphite layers. The graphite anode signature proves the cell uses lithium ions. The investigation puts it well: “it’s like we have a slightly noisy fingerprint and a picture of the suspect’s face. And yet again, it’s a match.” The calculated energy density? About 298 Wh/kg — what you’d expect from a good lithium-ion cell, not the 400 Wh/kg claimed.

The investigation reveals that the battery technology traces back to CT Coatings, a German company with an “eclectic” array of patents — including inventions for screen-printed paving slabs, menu folders, and warning triangles. CT Coatings promised Nordic Nano and Donut Lab a screen-printed sodium-ion solid-state battery. What it delivered was a lithium-ion pouch cell.

The world’s oceans are under “severe and accelerating” pressure from human activities, with the rate of sea-level rise double that of a decade ago, according to a damning assessment from the United Nations. The “intensifying” stressors, which include pollution and large-scale industrial fishing, are cumulative, said the report, resulting in widespread biodiversity loss and putting ocean systems under “severe strain.”

The UN’s third World Ocean Assessment, which reflects the work of nearly 600 scientists from 86 countries, looked at the oceans’ health from 2021-25. The previous report, that covered up to 2018, found persistent degradation of the marine environment. Five years on, scientists know more about the cumulative impacts of anthropogenic pressures on the ocean, and the latest report shows just how much of the damage has been done in the past few years. The scientists’ key findings include:

- Sea levels continue to rise at an increasing rate, from 2mm a year prior to 2015 to 4.3mm a year in 2023.
- 16% of the increase in global ocean heat since 1955 occurred after 2018.
- The greatest relative warming has been observed in the Atlantic Ocean and the southern parts of the Indian and Pacific Oceans.
- Large gaps in knowledge persist — with only 27% of the ocean floor mapped by 2025, deep-sea ecosystems remain poorly understood.