Transistors, the building blocks of modern electronics, are typically made of silicon. Because it’s a semiconductor, this material can control the flow of electricity in a circuit. But silicon has fundamental physical limits that restrict how compact and energy-efficient a transistor can be.

MIT researchers have now replaced silicon with a magnetic semiconductor, creating a magnetic transistor that could enable smaller, faster, and more energy-efficient circuits. The material’s magnetism strongly influences its electronic behavior, leading to more efficient control of the flow of electricity. 

The team used a novel magnetic material and an optimization process that reduces the material’s defects, which boosts the transistor’s performance.

The material’s unique magnetic properties also allow for transistors with built-in memory, which would simplify circuit design and unlock new applications for high-performance electronics.

“People have known about magnets for thousands of years, but there are very limited ways to incorporate magnetism into electronics. We have shown a new way to efficiently utilize magnetism that opens up a lot of possibilities for future applications and research,” says Chung-Tao Chou, an MIT graduate student in the departments of Electrical Engineering and Computer Science (EECS) and Physics, and co-lead author of a paper on this advance.

Chou is joined on the paper by co-lead author Eugene Park, a graduate student in the Department of Materials Science and Engineering (DMSE); Julian Klein, a DMSE research scientist; Josep Ingla-Aynes, a postdoc in the MIT Plasma Science and Fusion Center; Jagadeesh S. Moodera, a senior research scientist in the Department of Physics; and senior authors Frances Ross, TDK Professor in DMSE; and Luqiao Liu, an associate professor in EECS, and a member of the Research Laboratory of Electronics; as well as others at the University of Chemistry and Technology in Prague. The paper appears today in Physical Review Letters.

Overcoming the limits

In an electronic device, silicon semiconductor transistors act like tiny light switches that turn a circuit on and off, or amplify weak signals in a communication system. They do this using a small input voltage.

But a fundamental physical limit of silicon semiconductors prevents a transistor from operating below a certain voltage, which hinders its energy efficiency.

To make more efficient electronics, researchers have spent decades working toward magnetic transistors that utilize electron spin to control the flow of electricity. Electron spin is a fundamental property that enables electrons to behave like tiny magnets.

So far, scientists have mostly been limited to using certain magnetic materials. These lack the favorable electronic properties of semiconductors, constraining device performance.

“In this work, we combine magnetism and semiconductor physics to realize useful spintronic devices,” Liu says.

The researchers replace the silicon in the surface layer of a transistor with chromium sulfur bromide, a two-dimensional material that acts as a magnetic semiconductor.

Due to the material’s structure, researchers can switch between two magnetic states very cleanly. This makes it ideal for use in a transistor that smoothly switches between “on” and “off.”

“One of the biggest challenges we faced was finding the right material. We tried many other materials that didn’t work,” Chou says.

They discovered that changing these magnetic states modifies the material’s electronic properties, enabling low-energy operation. And unlike many other 2D materials, chromium sulfur bromide remains stable in air.

To make a transistor, the researchers pattern electrodes onto a silicon substrate, then carefully align and transfer the 2D material on top. They use tape to pick up a tiny piece of material, only a few tens of nanometers thick, and place it onto the substrate.

“A lot of researchers will use solvents or glue to do the transfer, but transistors require a very clean surface. We eliminate all those risks by simplifying this step,” Chou says.

Leveraging magnetism

This lack of contamination enables their device to outperform existing magnetic transistors. Most others can only create a weak magnetic effect, changing the flow of current by a few percent or less. Their new transistor can switch or amplify the electric current by a factor of 10.

They use an external magnetic field to change the magnetic state of the material, switching the transistor using significantly less energy than would usually be required.

The material also allows them to control the magnetic states with electric current. This is important because engineers cannot apply magnetic fields to individual transistors in an electronic device. They need to control each one electrically.

The material’s magnetic properties could also enable transistors with built-in memory, simplifying the design of logic or memory circuits.

A typical memory device has a magnetic cell to store information and a transistor to read it out. Their method can combine both into one magnetic transistor.

“Now, not only are transistors turning on and off, they are also remembering information. And because we can switch the transistor with greater magnitude, the signal is much stronger so we can read out the information faster, and in a much more reliable way,” Liu says.

Building on this demonstration, the researchers plan to further study the use of electrical current to control the device. They are also working to make their method scalable so they can fabricate arrays of transistors.

This research was supported, in part, by the Semiconductor Research Corporation, the U.S. Defense Advanced Research Projects Agency (DARPA), the U.S. National Science Foundation (NSF), the U.S. Department of Energy, the U.S. Army Research Office, and the Czech Ministry of Education, Youth, and Sports. The work was partially carried out at the MIT.nano facilities.

On April 30, the MIT Schwarzman College of Computing’s Social and Ethical Responsibilities of Computing (SERC) initiative hosted a full-day research symposium examining how artificial intelligence is shaping the world and its implications for society. 

The symposium included research talks by SERC’s latest seed grant recipients on topics such as air pollution forecasting and responsible computer vision deployment, panels on AI alignment and AI in education, and a keynote address by Jon Kleinberg PhD ’96, the Tisch University Professor of Computer Science and Information Science at Cornell University. The event also featured a poster session, where student researchers showcased projects they worked on throughout the year as SERC Scholars.

“There is so much amazing research being done at MIT on how AI and computing can be forces for good that benefit humanity. It was inspiring to see so much community interest in all this cutting-edge work,” said Brian Hedden, co-associate dean of SERC and professor of philosophy, who holds an MIT Schwarzman College of Computing shared position with the Department of Electrical Engineering and Computer Science (EECS).

“As computing and AI become increasingly embedded in nearly every dimension of society, SERC’s mission is to help ensure that ethical reflection and technical progress advance together,” said Nikos Trichakis, co-associate dean of SERC and the J.C. Penney Professor of Management. “This year’s symposium highlights the extraordinary range of work underway across MIT, and creates a forum for our community to engage deeply with the responsibilities that come with shaping the future of computing.”

Aligning AI with human values — and what values those might be

The challenges with AI alignment and moral meshing lie in the ethical questions of how to instill “human values” onto a very powerful and rapidly changing technology. Who makes the decision on what values and rationalities are included in an ethical framework? How does one account for distortion when translating these values from user to machine? 

These questions, among others, were posed by Dylan Hadfield-Menell, associate professor of EECS, during a panel he moderated that brought together an interdisciplinary group of speakers.

Iason Gabriel, a philosopher and research scientist at Google DeepMind, used the example of a judge to illustrate his point. “You want a judge to have good character, but to still interpret the rules. A reasonable person, though not necessarily the best person who ever lived. When it comes to AI, it’s not appropriate to model it as perfect. AI should be doing what we tell it to do, while using its character to interpret according to our moral values.”

Bailey Flanigan, assistant professor of political science in a shared appointment with the MIT Schwarzman College of Computing in EECS, took this a step further. To her, the most important problem to AI alignment is “resolving fundamental questions on who is entitled to govern different types of AI systems in the first place.”

Joining Flanigan on the panel was Bernado Zacka, associate professor of political science. Given the momentum of AI and complex institutional designs, Zacka expressed, “one of the most urgent problems is understanding the wisdom contained in the systems we are replacing, and why they function the way they do.” 

As deployment pressure increases, it can often feel like people are building the plane as they fly it, although the panelists overall seemed optimistic about the trajectory of AI alignment, emphasizing how crucial human components are to shaping these systems.

Offloading versus uplifting

As students across all levels of education begin to use AI, questions arise on whether there’s a way to ethically incorporate AI tools while maintaining academic accuracy and rigor. At a panel on AI and education, MIT faculty and Marta McAlister, the director of Gemini for Education, explored how AI is already being used in their classrooms and discussed ways it can support learning while remaining aligned with instructional and curricular goals.

Professors Eric Klopfer and Samuel Madden, co-chairs of MIT’s Ad Hoc Committee on AI Use in Teaching, Learning, and Research Training, homed in on a central dilemma of whether AI is being used to offload work, rather than being used to help scaffold the concepts being taught. 

Madden, faculty head of computer science in EECS and the MIT College of Computing Distinguished Professor, described the process of cognitive struggle, whereby learning is done through a series of trials and failures. He said, “students now, when they hit that wall, their first instinct is to ask AI. They don’t see this as excelling in this process, and they haven’t actually acquired the skill you’re assessing.” The question then becomes how instructors maintain the process of cognitive struggle so it provides just enough of a challenge to combat the urge to use AI. 

Klopfer, who serves as director of the Scheller Teacher Education Program and the Education Arcade at MIT, echoed similar sentiments, in that critical thinking is no longer becoming a crucial step in the output of the work. Regarding where to start in keeping material just challenging enough, Klopfer suggested examining the curriculum as a whole. “Some core content has to go. We keep adding, instead of parsing or pruning,” he said. 

Moderator Justin Reich, director of the Teaching Systems Lab and an associate professor in the Comparative Media Studies Program/Writing, noted that while teens know that AI is bad, it doesn’t necessarily stop their AI usage. However, by inviting them into the discussion on how AI is implemented and incorporating a more reflective exchange with instructors, students could be more equipped to choose how they use these tools and why.

Regardless, AI tools and their implementation should not be treated as a one-size-fits-all policy. Pat Pataranutaporn, the Asahi Broadcasting Corporation Career Development Professor of Media Arts and Sciences and head of the Cyborg Psychology research group at the MIT Media Lab, said, “AI is not just one thing. It can and should be designed differently to promote things like creativity and critical thinking. What we measure, and how, shouldn’t be about getting the answer right. We should think about it would really mean for a student to learn these days.”

Is mimicking human reasoning just as good as the real thing?

With a slide deck that included chess grandmasters and film references, Kleinberg’s keynote address, titled “AI’s Models of the World, and Ours,” evaluated instances where AI systems have inadvertently set us up to fail due to a mismatch between the system’s model of the world and ours. 

To illustrate this point, Kleinberg used chess, where modern chess engines can compete at superhuman levels, but when paired with human partners, their strategies aren’t understandable or inferable to their human counterpart. These human handoffs would then lead to confusion. Kleinberg used the example of “The Fellowship of the Ring,” where Gandalf, a powerful wizard, entrusts a highly dangerous and important quest to a ragtag group of adventurers. For those familiar with the story, the group is unexpectedly left without Gandalf’s guidance, sending them into a temporary bout of very serious turmoil. 

When the chess engine hands a turn over to its human partner, the human struggles to pick up on the predictive move pattern that the engine has been following up until this point. “The danger of human-algorithm teams is that when the human takes over, the algorithm knows what it wants to do next, but the human doesn’t,” explained Kleinberg.

These analogies showcase the differences in the ways AI understands a world — through predictive simulations, pattern recognition, and constraints — to mimic human reasoning versus the innate, embodied knowledge that comes with the human experience, and whether these systems truly understand the worlds in which they’re operating. But the question remains that if the game still results in a checkmate, does it matter?

This April, humanity had front-row seats to space as the Artemis II Orion spacecraft transmitted crystal-clear footage of its historic journey around the moon over more than 250,000 miles back to Earth at speeds on par with those of home internet connections. 

The livestreaming of high-definition videos and high-resolution photos of the moon and Earth was made possible through the Orion Artemis II Optical Communications System (O2O). Developed by MIT Lincoln Laboratory in collaboration with NASA Goddard Space Flight Center, the onboard O2O payload was the space end of a high-speed laser communications (lasercom) link. 

This link reached Earth when Orion had a line of sight with primary optical ground stations located at NASA’s White Sands Test Facility in New Mexico and Caltech/NASA Jet Propulsion Laboratory’s Table Mountain Facility in California, or an experimental ground station at Australian National University’s Mount Stromlo Observatory. 

Together with terrestrial networks, O2O formed an internet backbone between the Artemis II Orion spacecraft and the Mission Control Center at NASA's Johnson Space Center in Texas.

Toward a high-speed internet in space

"Our goal was to demonstrate O2O's operational utility for human spaceflight, extending the high-bandwidth connections that internet users enjoy on Earth to astronauts in deep space," says lead systems engineer Farzana Khatri, a senior staff member in Lincoln Laboratory's Optical and Quantum Communications Group. "We not only demonstrated the first use of lasercom on a crewed mission beyond low Earth orbit, but also attracted massive public engagement as the astronauts shared multimedia from their journey in near-real time."

During the last missions to the moon in the late 1960s and early '70s, astronauts relied on radio-frequency systems to communicate. But radio waves can only carry so much data per second because of their low carrier frequency; the grainy, poor-quality video and images of the moon from that time speak to this limited bandwidth. 

With its much higher carrier frequency, infrared laser light can transmit 10 to 100 times more data per second than can radio waves. The switch from Apollo-era radios to Artemis-era lasers is analogous to the move from dial-up to high-speed internet. And a high-speed internet is rapidly becoming a key requirement for NASA missions as they collect more high-resolution data and push humans farther into deep space.

Lasering in on unprecedented views

During the Artemis II mission, from April 1 to 11, O2O downlinked nearly half a terabyte of data at speeds up to 260 megabits per second. This data trove contained never-before-seen views of the basins and craters on the far side of the moon, a crescent Earth setting behind the moon, a nearly hour-long total solar eclipse with other planets scattered across a star-filled sky, and flashes of light from tiny meteoroids striking the lunar surface.

"O2O was able to downlink all the data stored on multiple onboard cameras, allowing mission control to erase the memory cards and refill them with new photos and videos," explains Khatri. "For any space mission, scientists and spacecraft engineers are concerned that data not sent down during the mission can become corrupted or get destroyed. And, when the spacecraft capsule returns, downloading the data can sometimes take months. The lasercom capability provided by O2O ensured the data were preserved and immediately available for analysis."

O2O is based on the laboratory's R&D 100 Award–winning Modular, Agile, and Scalable Optical Terminal (MAScOT), which contains subassembly modules for pointing the laser beams, establishing a communications link with ground stations, and maintaining this link despite atmospheric conditions. MAScOT made its debut in space on the International Space Station in 2023, demonstrating NASA's first LEO user for their lasercom relay system.

Over the moon for O2O

Leading up to the launch of Artemis II, operations teams from the laboratory traveled to NASA's White Sands Test Facility and Mission Control Center (MCC) to conduct monthly maintenance on ground hardware and simulate different mission stages. During the 10-day mission, laboratory teams provided 24/7 coverage. 

At mission control, one laboratory team, along with NASA Goddard colleagues, interfaced with a mission flight controller to command the O2O payload, coordinated with U.S. and Australian ground terminals to bring up the O2O physical link, assessed whether overall O2O mission requirements were being met, and analyzed data to ensure payload health and optimize performance. Another laboratory team oversaw subsystems of the optical ground terminal at White Sands, while staff at the laboratory's main campus in Massachusetts offered subject-matter expertise.

Initially, O2O had a scheduled operational window of one hour per day, with the onboard radio system set to downlink most data. However, mission operators found O2O so useful that they maximized its operational time as the mission progressed. On the fly, mission operators adjusted Orion's attitude — how the spacecraft is oriented in space — so that O2O could have line-of-sight access with the ground.

"One special aspect of this mission that enabled our technology to be so impactful was the flexibility built into the planning process to account for the fact that humans hadn't been to the moon in more than 50 years, and it would be the first time sending astronauts on Orion," says Bryan Robinson, leader of the Optical and Quantum Communications Group. "An established process for making real-time changes to the plan and the willingness of operators to try out this new technology had a huge impact, even for this short mission. This impact was tangible by everyone in mission operations and by the public watching from home."

With Artemis II completed, engineers, scientists, and mission specialists are analyzing mission data. Their analyses will provide insights into spacecraft and subsystem performance and moon geology, which will inform lunar landings and deep-space exploration. While the laboratory team is still processing O2O performance data, they believe the system could downlink at least 10 times more data by improving the efficiency of the downlink process and by addressing data-flow bottlenecks in space and ground networks.

The laboratory team is now evaluating how lasercom could support future moon plans for Artemis and Ignition. Aligning with the National Space Policy to secure U.S. leadership in space, Ignition is a recently announced initiative to establish a permanent lunar base with a sustainable human presence.

"Participating in this historic mission from the MCC and having O2O be useful, I couldn't have asked for anything more amazing in my career," Khatri says.

"When I came home, I was floored by the response of people who engaged with the mission while it was happening. Much of that engagement was enabled by the technology we developed. That's a rare moment in a career doing what we do," Robinson adds. 

The internet is an essential resource for young people and adults to access information, explore community, and find themselves—both inside countries and across continents. Yet governments around the world continue to introduce and implement legislation requiring all online users to verify their ages before accessing the digital space. In some cases, politicians are going further, putting forth proposals to ban social media for younger users.  

In late 2025, Australia’s government rolled out the first complete ban on users under 16 from having social media accounts. In this sweeping regime, platforms are required to introduce age assurance tools to block under-16s, demonstrate that they have taken “reasonable steps” to deactivate accounts used by under-16s, and prevent any new accounts being created, or face fines of up to 49.5 million Australian dollars ($32 million USD). The 10 banned platforms—Instagram, Facebook, Threads, Snapchat, YouTube, TikTok, Kick, Reddit, Twitch, and X—have each said they’ll comply with the legislation, which led to young people losing access to their accounts overnight. Reddit is currently challenging the law in Australian courts on constitutional grounds. Recent research notes how the ban is preventing teenagers from accessing news in the country. 

In the United Kingdom, rules took effect in mid-2025 under the Online Safety Act that require all online services available in the country to assess whether they host content considered harmful to children; if so, these services must introduce age checks to prevent children from accessing such content. Online services are also required to change their algorithms and moderation systems to ensure that content defined as harmful, like violent imagery, is not shown to young people. 

This approach is reckless, short-sighted, and we’ve already seen it introduce more harm to the young people that it is trying to protect. The UK’s scramble to find an effective age verification method shows us that there isn't one, and we’ve spent years urging UK politicians to abandon any measures that require platforms to collect data or remove privacy protections around users’ identities. 

Earlier this year, Indonesia’s Communications and Digital Affairs Minister, Meutya Hafid, announced that users under 16 would have their accounts on “high risk” platforms deactivated from 28 March. The platforms subject to this ban are YouTube, TikTok, Facebook, Instagram, Threads, X, Bigo Live, and Roblox; with Hafid noting how this policy would make Indonesia “the first non-Western country to delay children's access to digital spaces according to age.”

Similarly, the Malaysian government has recently pushed forward with plans to ban users under 16 from having accounts on social media platforms with at least 8 million users in Malaysia, including Facebook, Instagram, TikTok, and YouTube. Users under the age of 16 are being told to download or transfer their data from these platforms in one month before the restrictions are applied. Platforms failing to comply with the ban may face penalties of up to $2.5 million USD.

In Latin America, Brazil approved a new law in 2025 establishing that providers of information technology products and services directed to children and teenagers, or likely to be accessed by them, must conduct age checks when their products and services offer risks to underage users. Regulation requires age assurance for products and services that are not allowed for children and adolescents in accordance with Brazilian legislation. App stores and operating systems are required to provide age signals for other providers. 

While the law is already in force, full compliance with its obligations is expected for early 2027, after the approval of further regulations and a transition period, and the authority responsible for enforcing the law is the Brazilian National Data Protection Agency. The list of concerns regarding the implementation of the law include: the wide scope of products and services that may fall within age-check obligations, how these obligations can affect non-proprietary operating systems and free software projects, and how effective the law's crucial data protection safeguards will be in a context of likely widespread age checks for accessing content online.

Similarly, the European Union has taken large steps towards mandatory age verification that could undermine privacy, expression, and participation rights for everyone. Politicians are promoting an EU-wide approach to age verification through its age verification “app,” which will be fully interoperable with the Digital Identity Wallet. While this mini-app has been announced as technically ready to be rolled out “for citizens to use,” it comes with its own realm of potential privacy and security concerns, such as long-term identifiers (which could result in tracking) and over-exposure of personal information. 

The European Commission also supports age verification in various legislative initiatives, from proposals that would allow or mandate companies to scan our communication (“Chat Control”) to non-binding guidelines of existing laws, such as the Digital Services Act. The EU Parliament, too, has proposed an EU digital minimum age of 16 for access to social media, a move that aligns with EU Commission’s president Ursula von der Leyen’s recent public support for measures inspired by Australia’s model. To all these initiatives EFF has provided one consistent response: mandatory age verification measures are not the right way to protect young people. 

These proposals restrict the fundamental rights of young people to speak to each other and to access information. They also force all internet users, not just those under a certain age, to upload private data—like a face scan or passport—in order to access a website or service. In considering the vast scope of privacy issues pertaining to the collection, storage, and sharing of this personal information, the problems of age verification in restricting free speech are compounded by these reckless and harmful approaches to verification. 

The problem of censorship and surveillance goes far beyond the borders of the internet. EFF continues to explore support for legislative and litigation challenges that recognize how these laws harm everyone’s rights to privacy, free expression and due process.

Last year during LGBTQ+ Pride month, we launched an LGBT Q&A where we answered your most pressing digital rights questions on EFF’s Instagram and TikTok  accounts. 

Ahead of LGBT Q&A Season 2 launching next week, we’re posting a recap with some of the questions we answered. Check them out below.

1. You wanted to know: How to stay safe when dating online.
2. You asked: I'm a 17 year old trans woman and my address is public on the Internet. What steps can I take to mitigate this risk? 
3. You wondered about: Tips for staying safe at Budapest Pride.
4. You questioned: Why does homophobic content I report on social media not get removed?  
5. You asked: What pictures are safe to use on dating apps?
6. You wanted to know: Is it safe to have gay, trans, and Palestinian flags in my bio? 

We’re here to help build an online space where you get to decide what aspects of yourself you share with others, how you present to the world, and what things you keep private. Join us to make the internet private, safe, and full of pride.

Researchers have prototyped an AI-powered internet worm.

The coolest thing about the prototype is that it carries its own LLM with it, and runs it on computers that have been broken into.

This is the closest to John Brunner’s original 1975 conception of a computer worm that I’ve seen.

A federal judge ordered an environmental group to turn over an expert witness’s AI “prompts” in a lawsuit against Shell.

Lawmakers rejected the biggest changes sought by Gov. Dan McKee, who argued they would help curb spiking utility bills.

Owner PacifiCorp says it needs to meet data-center-driven demand increases.

The New York governor's shift on energy, culminating with weakening the state’s landmark climate law, is drawing plaudits from business leaders and centrist Democratic thinkers.

The president unveiled $185 million in grants for two new plants in West Virginia and Alaska.

Irish protection of peatlands is still "inadequate," the European Commission ruled, despite legal warnings since 2019.

In recent months, mounting criticism from industry and countries has charged that the climate policy is exacerbating industry during a generational energy crisis.

Jim Hagemann Snabe, Siemens’ chair, will advise the European Commission on industrial applications of artificial intelligence.

MEPs complained about AllatRa Global Research Center holding an event on Parliament premises.

Moderate measures could be deployed by the end of June, said canal administrator Ricaurte Vásquez Morales.

Nature Climate Change, Published online: 05 June 2026; doi:10.1038/s41558-026-02656-3

Global warming boosts freshwater methane production. Now, a study shows that methane oxidizing bacteria cannot increase their methane consumption rates enough in response to warming-induced enhancement of methane availability, leading to higher emissions.

Nature Climate Change, Published online: 05 June 2026; doi:10.1038/s41558-026-02643-8

Blue carbon brings new interest in the land and sea rights of coastal communities, small-scale fishers and Indigenous peoples. While promises of climate mitigation, conservation and economic benefits are compelling, blue carbon projects must uphold local agency and rights as a legal and ethical duty, not just as conditional for project approval.

Nature Climate Change, Published online: 05 June 2026; doi:10.1038/s41558-026-02649-2

How the balance of microbial methane production and oxidation in freshwater systems will change with warming is unclear. This study uses natural warming experiments to demonstrate that methane emissions increase because oxidation keeps pace with, but cannot exceed, warming-accelerated production.

Nature Climate Change, Published online: 05 June 2026; doi:10.1038/s41558-026-02651-8

Blue carbon projects are expanding, yet their implications for tenure security remain uncertain. Analysis of 122 guidance documents reveals that rights are narrowly interpreted and key international obligations are overlooked, leaving rightsholders vulnerable to dispossession and exclusion.