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.

Harrowing story of an identity theft victim.

Yes, the person made a mistake—they gave the scammer a two-factor authentication code that allowed the scammer to take over their email address. But the real story here is how, for many of us, the security of most of our accounts hangs on the security of our email accounts.

The House Education and Workforce Committee approved the legislation along party lines.

Manufacturers and green groups have already challenged the Trump administration’s decision to give industries five more years to phase out potent greenhouse gases.

The groups allege the Trump administration illegally ended a $7 billion Biden-era residential solar program.

The decision could have implications for a separate but related fight over the $20 billion Greenhouse Gas Reduction Fund grants.

The decision is a loss for green groups who claimed the commission should have done more to evaluate harm.

Previous El Niños have dried up freshwater lakes supplying the canal, causing the Panama Canal Authority to impose daily transit restrictions.

Swollen rivers and flooded roads have stranded 104,271 people, officials reported, warning that overwhelmed rivers will remain a threat even when the rainfall eases.

Video footage from the provincial capital city of Parun showed scenes of utter devastation, with piles of mud, rocks and rubble where buildings used to be

Intermediary liability laws around the world recognize that social media platforms, search engines, and other online service providers have become an integral part of our lives: they shape how we access information, communicate with others and participate in public debate, and foster innovation online. These laws generally shield platforms, to varying degrees, from legal liability for user content: the responsibility for unlawful speech should rest primarily with the speaker, not with those who merely host it.  

These liability protections are not a gift for platforms. They exist so that platforms are not encouraged to proactively monitor and filter what we say online, or to remove even lawful speech simply to avoid legal risk. 

This is why a recent judgment by the EU Court of Justice, Coyote System (Joined Cases C-188/24 and C-190/24), is concerning: it could deprive online platforms of liability protection because of how they organize and disseminate user content. The consequences for freedom of expression could be significant. 

Liability Protections in the EU 

The European Union has long embraced a system of limited liability for online service providers. Under the e-Commerce Directive and now the Digital Services Act (DSA), platforms benefit from liability exemptions for user content. To discourage censorship, they also cannot be required to generally monitor user content or actively search for illegal activity. But that liability protection comes with qualifications: Platforms lose this benefit if they play an "active role" such that they have knowledge of, or control over, user-provided information (Recital 42 ECD, Recital 18 DSA, and case law, for example para. 113 in L’Oréal v eBay). For hosting services, providers must remove or disable content they know to be illegal. The DSA has introduced extensive due diligence obligations for platforms but left these foundational immunities intact. The message is clear: platforms bear responsibility for proper systems and processes, but generally not for users' speech. 

Coyote System, however, could undermine this balance. Confronted with a case about restrictions on navigation systems that transmit information to drivers about roadside checks, the Court formulated a general test for when an intermediary ceases to be a "neutral" host and therefore loses the hosting liability exemption. In essence, the Court held that where an intermediary's algorithm goes beyond merely categorizing and indexing user information to determine, "under what conditions, how and in which order of priority" (para. 122) information is disseminated, the intermediary "controls" that information and is deprived of protection under the e-Commerce Directive. 

Let's be clear: the case is not about a service that ranked or recommended user-generated content in the way social media platforms do. It is about the collection and real-time relay of user alerts about roadside checks. However, the Court's reasoning is not confined to navigation services. Recommendation algorithms determine how and in what order user content is disseminated across virtually every major online platform. Should such platforms now cease to qualify as neutral intermediaries and lose the protection of the hosting liability exemption? The answer should be no. 

The Meaning of Control 

Control has never been understood this broadly. Nor should it be. Every hosting service provider, think of Facebook, Amazon or Bluesky, will have some control over users’ content. If that ability alone ruled the analysis, the liability exemption would become largely meaningless. Instead, the disqualifying “active role” must relate to the actual content itself, not merely the technical means by which that content is organised or disseminated. 

The Court’s own case law reinforces this conclusion: In YouTube and Cyando, it examined a platform that categorises, ranks and recommends user content through algorithms, yet still proceeded on the basis that it could generally benefit from the hosting liability exemption. To be sure, the Court was mainly addressing specific knowledge of illegal content rather than the separate category of control. Even so, the underlying premise is clear: those features do not, by themselves, place a platform outside of protection. Advocate General therefore explained that what matters is the providers "intellectual control of that content" (para 152). The relevant question is who controls the information itself, makes it their own, not who determines how it appears. 

That is precisely where Coyote System breaks new ground and offers a dangerous change of emphasis. By equating algorithmic organisation with content control, the ruling risks excluding social networks and other platforms from the liability exemption and encouraging proactive monitoring of what users say online and removal of lawful content. 

That outcome would have terrible consequences for freedom of expression in the EU. It’s also difficult to reconcile with the structure of the DSA, which certainly does not treat recommendation algorithms as incompatible with intermediary immunity. On the contrary, it accepts them as a defining feature of modern platforms, regulates them extensively through dedicated due diligence obligations, and still leaves the hosting liability regime untouched (it even integrated the YouTube ruling in its preamble!).  

This was no accident: During the DSA negotiations, proposals to deprive platforms of the hosting liability exemption if they optimize, classify, organize or otherwise promote online content were rejected, following successful advocacy by EFF and allies. Would the Court have decided this case differently under the DSA? Probably not. It’s more plausible that the EU judges were influenced by the specific nature of the service, which could explain why the judgment says remarkably, and sadly, little about why intermediary liability exists in the first place and the fundamental rights it serves. Coyote System did not merely transmit user reports but aggregated them into what the Advocate General described as a new "information layer," a distinction omitted by the Court. 

Chipping Away at Intermediary Liability Protections 

The danger is that the Court's broad language on algorithmic curation reaches well beyond that narrow category and, unintentionally or not, chips away at one of the most important safeguards for freedom of expression online.  

Unfortunately, Coyote System does not stand alone. It is the latest in a line of judgments that have gradually narrowed intermediary liability protections. Recently, in Russmedia, the Court privileged preventive content control in the name of data protection, paying little regard to the possibility of reconciling both regimes and the privacy costs of increased monitoring of user content. And in AGCOM, concerning Google's liability for YouTube videos uploaded by creators participating in its Partner Programme, the Court appears to leap from eligibility reviews to specific knowledge of illegal content. 

There is a political risk too. While the top court’s reasoning will be applied by national courts and further refined over time, the European Commission has shown little hesitation in incorporating landmark rulings into legislation. Just recently, in its digital omnibus proposal, it selectively restated part of a recent Court of Justice judgment to justify narrowing privacy rights of users. 

If these trends continue, freedom of expression online will become collateral damage in the EU. 

Nature Climate Change, Published online: 22 July 2026; doi:10.1038/s41558-026-02697-8

The authors review ecological novelty—ecological situations with no precedent—arising from climate change. They discuss ecological novelty due to direct and indirect effects of climate change, and due to adaptation and mitigation measures, and explore management options that are against, for or tolerant of ecological novelty.

Stars and galaxies make up much of the universe’s ordinary, observable matter. But for decades, scientists have wrestled with a cosmic conflict: There should be much more. 

Physicists have good estimates of how much matter was present in the early universe. Shortly after the Big Bang, roughly 83 percent of all matter in the universe was composed of invisible dark matter, with ordinary matter making up the rest. And yet, these estimates exceed the amount of ordinary matter seen in stars and galaxies today. Where, then, did all the missing ordinary matter go? 

Now MIT scientists, as part of the CHIME/FRB Collaboration, are using far-off radio signals to reveal missing matter in the vast space between galaxies. The team has developed a new method to search out missing matter by combining locations of galaxies with detections of fast radio bursts. 

A fast radio burst, or FRB, is an ultrabright, millisecond flash of radio waves emitted by extremely energetic phenomena in the distant universe. As it travels through space, the signal from a fast radio burst gets stretched, or “smeared,” in time. The more missing matter that it passes through, the more smeared the signal becomes. 

The MIT-led team measured the degree of smearing experienced by thousands of FRB signals detected on Earth. Then they compared each FRB smear with locations of galaxies across the universe to determine how much of an FRB’s smearing was due to galaxy matter versus other, missing matter. 

The new method revealed not only whether missing matter was present, but also where. Specifically, the researchers discovered that it exists in very diffuse clouds surrounding groups of galaxies. These clouds extend out from the galaxies, to much further distances than scientists had predicted. 

“We find that, overall, where there are more galaxies, there tends to be more missing matter around them,” says Haochen Wang, a graduate student in MIT’s Kavli Institute for Astrophysics and Space Research.

The results, reported today in the journal Physical Review Letters, support the idea that matter is flung outside a galaxy through black hole jets, exploding stars, and other highly energetic processes within a galaxy. What’s more, the findings suggest that such processes are more energetic than scientists had thought. 

“We’re finding missing matter that is pushed out to larger scales,” says Kiyoshi Masui, associate professor of physics at MIT. “These measurements indicate that star activity, and activity from black holes, is stronger and much more violent than predicted.”

Masui and Wang are co-authors of the new study, which includes Shion Andrew, Adam Lanman, Kenzie Nimmo, and Ryan Raikman from MIT, and collaborators from multiple other institutions as part of the CHIME/FRB Collaboration. 

The shape of matter

The vast majority of ordinary, observable matter in the universe is built from baryons — a type of subatomic particle that includes protons and neutrons, and that makes up most of an atom’s mass. Scientists estimate that just 17 percent of the early universe was made from this “baryonic” matter, shortly after the Big Bang. 

Some of that early matter was forged into every substantial thing we see today, from planets, stars, and galaxies, to our own bodies. But as scientists have realized, this matter doesn’t quite add up. The total mass of all the stars, galaxies, and galactic clouds is about a tenth of the baryonic matter that existed in the early universe. There must be more matter, likely in the spaces between galaxies. But the universe is vast. Any leftover matter likely exists at extremely low densities, of around a single proton per cubic meter, making it extremely challenging to detect.  

Recently, however, Masui and others have found that such missing matter could be sussed out using fast radio bursts. FRBs were first discovered in 2007, and since then astronomers have detected several thousand of the mysterious, ultrashort signals from distant galaxies, billions of light years away. 

“What makes FRBs good to probe missing matter is that they have a special property,” Wang says. “They start out as a very quick flash, and as they pass through matter, they smear out in time. And we can measure that smearing very precisely, which is directly proportional to how much missing matter the FRB passed through.”

Researchers have previously taken advantage of this smearing property of FRBs to detect missing matter around galaxies. These efforts have confirmed that tenous clouds exist in the vast spaces between galaxies. Masui and Wang wanted to go a step further. 

“We’re not just probing if the gas is with the galaxy or not, but we are seeing the shape of the missing matter that’s around the galaxies,” Wang says. “By mapping the shape of missing matter, we can understand how galaxies form and how they interact with their environment.”

Galactic fountains

For their new study, the team mapped the shape of missing matter around galaxies by cross-correlating thousands of FRB measurements with locations of millions of galaxies. They used data from two sources: the Canadian Hydrogen Intensity Mapping Experiment (CHIME) and the Dark Energy Spectroscopic Instrument (DESI) survey. 

CHIME is a large radio telescope located in British Columbia, Canada, that is designed to scan the entire northern sky for incoming radio waves. The telescope is sensitive to ultrashort, ultrabright radio signals, and since it began observing, CHIME has detected about 4,000 fast radio bursts across the sky. 

DESI is an instrument that is mounted on the Mayall Telescope at Kitt Peak National Observatory, near Tucson, Arizona. The instrument makes detailed measurements of the light coming from over 30 million galaxies, to provide estimates of dark energy — the mysterious force that drives the expansion of the universe. 

From CHIME’s catalog of detections, members of the CHIME/FRB collaboration analyzed 2,870 FRB signals. Each signal is a burst of radio waves, at multiple wavelengths, from highest to lowest energy. The higher-energy “blue” waves typically are less affected by any missing matter they travel through, and therefore should arrive at a detector before lower-energy “red” wavelengths, which are more delayed, or “smeared,” in time. 

The team measured the smearing of each FRB’s various wavelengths, which they could then directly relate to the amount of matter that the FRB must have traveled through before reaching CHIME’s detectors. Masui and Wang then correlated these measurements with the locations of over 6 million galaxies provided by DESI data. In this way, they could look for an association between the missing matter and the galaxies, and measure where one is in relation to the other. 

Their analysis revealed a pattern: Missing baryonic matter tended to be found around galaxies and galaxy clusters. But rather than gathering close to galaxies in a dense ball, missing matter was scattered across a large radius, similar to a diffuse puff. 

“A galaxy is maybe a few 100,000 light years across, and we found missing matter out to about 4 million light years,” Masui says. “That’s further than the simulations predict, by quite a bit.”

“We are finding that the activity in galaxies is messier than we thought,” Wang says. “They’re more like fountains, and really push out gas to very large distances.”

The new results show that fast radio bursts can be a reliable method by which to search for missing matter. As CHIME continues to detect more FRBs, the team says its method can only improve.

“We got it to work for the first time, and will get it to work even more precisely as data gets better,” Masui says. 

CHIME and CHIME/FRB are supported by the Canada Foundation for Innovation, the Natural Sciences and Engineering Research Council of Canada and, the provinces of British Columbia, Québec, and Ontario. This study was supported in part by the U.S. National Science Foundation.

On June 4, colleagues held homemade signs, waved pompoms, and cheered loudly for award recipients in Kresge Auditorium. Twenty individuals and three teams received MIT Excellence Awards — the Institute’s highest honor for staff. Additional honors included the Collier Medal, the Staff Award for Distinction in Service, and the Gordon Y. Billard Award. 

The Collier Medal honors the memory of MIT police officer Sean Collier, who gave his life in service to the MIT community. Recipients embody a deep commitment to community and approach their work with compassion for others. The Staff Award for Distinction in Service is presented to an individual who approaches their work with kindness, empathy, and approachability, and serves as a trusted adviser at the Institute. The Gordon Y. Billard Award is given to staff or faculty members, or MIT-affiliated individuals, who make "significant and lasting contributions to the MIT community."

The 2026 MIT Excellence Award recipients and their categories are: 

Bringing Out the Best 

• Robin Elices 

• Kate McCarthy 

• Jim Mitchell 

Embracing Inclusion 

• Allison Chang 

• Mandana Sassanfar 

Innovative Solutions 

• Kayla S. (KB) Burt 

• Amanda Jarvis 

• Julie Uva 

• Sustainability Team (Yu Cheng, Brian Goldberg, Susy Jones, Steve Lanou, Ellie McLane, and Julie Newman) 

Outstanding Contributor 

• Barry Pugatch 

• Emma Shortall 

• Chao Li 

• Catherine Nunziata 

• Trinidad Carney 

• Gang Liu 

• Laura von Bosau 

• James Daley 

• Craig Rowe 

• MIT Health Housekeeping Team (Michael Batista, Maria Coelho, Mae Evans, Maria Fatima Rosario, Selam Stefanos, Claudia Teixeira, and Claudia Vidal)

Serving Our Community 

• Olivia Cheo 

• Clayton Hainsworth 

• Atsushi Takahashi 

• MIT Health Ambulatory Safety Net and Population Management Team (Michele M. A. David, Solanlly Mendez, Pamela Mensah, Nicole Napier, Lucus David Sensius, and Stephanie Shaprio)

The 2026 Collier Medal recipient was Michael Grenier, pub manager, dining, Division of Student Life. At the Muddy Charles and the Thirsty Ear pubs, Grenier creates spaces where MIT community members can relax, meet friends, and find unconditional support. His acts of kindness are woven into the atmosphere he creates, and alumni regard him as someone who shaped an important part of their early adult lives. 

This year’s winner of the Staff Award for Distinction in Service was Christina Couch, associate director and lecturer, MIT Graduate Program in Science Writing, Comparative Media Studies, School of Humanities, Arts and Social Sciences (SHASS). Couch has been an invaluable member of the SHASS community — as a student, alumna, and staff member. Through her work, she has created opportunities for students to interact and build relationships with professional journalists, and underlying everything she does is her compassion and deep belief in student potential.

Three community members were honored with a 2026 Gordon Y. Billard Award.  

• Cullen R. Buie, professor of mechanical and biological engineering, associate department head of mechanical engineering, and head of house, Maseeh Hall 

• Traci Swartz, assistant director, Community Services Office, Institute Affairs, Office of the President 

• David L. Verrill, executive director, Initiative on the Digital Economy, MIT Sloan School of Management 

Presenters included Provost Anantha Chandrakasan; MIT Chief of Police John DiFava and Captain Andrew Turco; Executive Vice President and Treasurer Glen Shor; Associate Provost Maria Yang; Dean of the School of Science Nergis Mavalvala; Lincoln Laboratory Assistant Director Justin Brooke; Vice President for Human Resources Ramona Allen; and Chancellor Melissa Nobles. 

Visit the MIT Human Resources website for more information about the award recipients, categories, and to view photos and video of the event. 

Every year, MIT’s graduation coincides with the joyful reunion of classes past, but this year brought a special occasion for the Department of Electrical Engineering and Computer Science (EECS). Senior Lecturer Gim Hom hosted a special reunion for around 15 of his classmates from the Class of 1971 in the Cypress Engineering Design Studio, a staffed makerspace and classroom run by the department. (Yes, for those of you doing some hasty subtraction, that is a 55th-year reunion.) Participants worked with electronic components just as they did in labs long ago, building their choice of two projects: a simplified electrocardiogram (ECG) and an audio amplifier. But the event wasn’t only a reunion. For Hom, the activity doubled as his chance to teach a “last class.” 

He explains: “As a lecturer, I use real-world problems and solutions to teach concepts in analog and digital design. For the reunion activity, I drew upon two existing labs from my courses and stripped out the theory material, leaving only the assembly for the reunion activity.”

For the first activity, attendees refreshed their soldering skills, assembling a printed circuit board (PCB) that approximated the design of an ECG before attaching electrodes and rolling up their sleeves (literally) to view the electrical impulses of their heartbeats. Hom explains that “in 6.2040 (Analog Lab), I use the ECG as a platform for teaching signal acquisition, filtering, and display. Students first analyze the design of an ECG circuit and then build and solder the board themselves, gaining hands-on experience with printed circuit board assembly. For many students, this is their first exposure to soldering.”

In the second activity, the alumni learned to surface mount solder, a skill that, while technically possible, had not yet become popularized during their time as undergraduates at MIT. “Modern electronics primarily rely on surface-mount technology (SMT),” explains Hom. “To give students exposure to SMT assembly, I designed an optional laboratory project: a small USB-powered audio amplifier that students can use to play music from their phones. While external speakers must be connected, the amplifier yields surprisingly good sound quality.”

Throughout the day, technical instructors Anthony Pennes and Liam Ackerman (both coincidentally celebrating their own reunions, at 10 and 5 years out from MIT, respectively) remained on hand to answer questions and familiarize attendees with the technology available in the Engineering Design Studio, which is open to the EECS community from morning until nearly midnight throughout the school year. 

“It was wonderful to see alumni leave with a working board with big smiles on their faces,” says Hom, who, while no longer teaching, will continue part time as an advisor to EECS students.

Meanwhile, his classmates have a working memento of their time at MIT — and a reminder that technical skills can last a lifetime. 

It’s a lot:

According to information obtained by The Tech, MIT is spending over $3 million on more than 500 AI surveillance cameras in academic buildings, residence halls, and outdoor areas along Memorial Drive. Installation of the new cameras, along with the wiring and infrastructure that will support them, began November 2025 and will likely continue until September 2026.

Technical specifications for the cameras suggest that they will be capable of collecting real-time face and object classification data, including detection of motion, loitering, crowds, face masks, and camera tampering. Individuals can also be automatically classified on the basis of clothing color, gender, and age, up to a distance of 35 feet (11 meters) from the camera. According to a statement from MIT spokesperson Kimberly Allen, any collected data is “retained up to 30 days,” unless an exception is granted...

The president invoked an obscure process to review the institution's federal grants over what he says is "climate fraud."

A third of the research offices the agency is evaluating to possibly close works in climate adaptation and wildfire prevention.

The latest Ratepayer Protection Act would apply more specifically to data centers.

The Trump EPA recently asked Congress to undo four more federal waivers underpinning California air pollution rules.