This is today’s edition of The Download, our weekday newsletter that provides a daily dose of what’s going on in the world of technology.

What OpenAI’s latest controversy tells us about the future of math

OpenAI says its agents have solved one of the most important open problems in mathematics. Under normal circumstances, that would be a huge milestone. But the announcement has been overshadowed by accusations that OpenAI failed to credit researchers whose AI-assisted work influenced its solution.

Whether those accusations are true or not, the episode may mark a turning point in the history of mathematics. AI models now seem essential for making progress on the field’s most important problems, but solving them may demand resources available only to a couple of frontier AI companies.

If that’s the future we are headed for, it is unclear how human mathematicians will fit into it.

Read on to see how AI could reshape mathematics.

—Grace Huckins

Batteries just broke another record in the US

Battery installations hit a new record in the US in the second quarter of 2026, with 20.2 gigawatt-hours of new capacity coming online. That’s enough to supply the daily electricity needs of 600,000 homes.

The surge puts the country on track for another record year, driven by cheaper batteries and an urgent need for more energy storage as renewables are added to the grid. But the boom looks different for grid-scale and residential batteries.

Take a closer look at the forces reshaping the US battery market.

—Casey Crownhart

This entrepreneur is developing agents that can plan ahead

Danijar Hafner’s office in San Francisco’s SoMa district sits mostly empty, but what it lacks in decor, it makes up for in robots. Humanoids of various shapes and sizes hang like marionettes from racks that run down the center of the wide-open space.

Hafner won’t say too much about his new venture just yet, but describes it as a continuation of his longtime work to enable AI to navigate environments it has not encountered in training.

Over the years, the 31-year-old has honed his approach by pitting agents trained within his world models against popular video games. More recently, he’s begun migrating his agents out of the virtual world and into physical reality.

Learn more about Hafner’s work teaching AI about our world.

—Mat Honan

Danijar Hafner is one of the artificial intelligence honorees on our 35 Innovators Under 35 list for 2026. Meet the rest of them here, or explore the full list across the biotechnology, AI, computing and robotics, and climate and energy categories.

MIT Technology Review Narrated: data from drones in Ukraine is fueling a new Wild West marketplace

Battlefields in Ukraine are littered with the remnants of drones. But behind all that wreckage, there’s a new gold mine for the defense sector: the data those drones generate.

Ukraine has begun making millions of data points gathered during tens of thousands of drone flights available to military contractors and commercial companies. It’s a quick way to attract funding and partnerships, but it turns the front line into a model training site, using the chaos of war to create conditions that AI companies struggle to reproduce.

As this new industry takes shape, we need a regulatory system that ensures battlefield data isn’t treated like ordinary commercial material.

This is our latest article to become an MIT Technology Review Narrated podcast, which we publish each week on Spotify and Apple Podcasts. Just navigate to MIT Technology Review Narrated on either platform, and follow us to get all our new content as it’s released.

The must-reads

I’ve combed the internet to find you today’s most fun/important/scary/fascinating stories about technology.

1 OpenAI says it cracked a 90-year-old maths problem in 88 hours
It used 10,000 AI agents to tackle the Navier-Stokes equations. (CNBC)
+ OpenAI claims it’s the first major math problem solved by AI. (Nature)
+ But the breakthrough has been overshadowed by a credit controversy. (Axios)
+ OpenAI spent millions to win the $1 million math contest. (Quanta)

2 The US has accused six Chinese AI firms of “industrial-scale” theft
They include DeepSeek, Moonshot AI, Alibaba, and Z.AI. (CNN)
+ Officials accuse them of stealing America’s AI trade secrets. (Reuters $)
+ They allegedly used model distillation to train their systems. (WSJ $)
+ Targeting Claude, ChatGPT, Gemini, and Grok, among others. (NBC News)

3 The Pentagon asked OpenAI for an AI model that rarely says no
The military wanted it to have “minimal refusal rates.” (Intercept)
+ The Pentagon says US allies can’t keep pace on AI. (Guardian)
+ AI firms may soon train on classified military data. (MIT Technology Review)

4 Apple is expected to unveil a $2,000 folding smartphone today
It would be the iPhone’s biggest design change since its 2007 launch. (Guardian)
+ And the first big test for new CEO John Ternus. (NYT $)
+ Xiaomi and Huawei launched their own new foldables before the event. (CNBC)

5 Meta’s new AI agent can access apps to send emails and make payments
Muse autonomously uses apps and websites on people’s behalf. (CNBC)
+ Internal tests found it could expose sensitive personal data. (Reuters $)
+ AI agents are not your “coworkers.” (MIT Technology Review)

6 Google says it’s “degrading” search in Europe to comply with EU rules
New results will give more prominence to comparison sites. (Reuters $)
+ The changes follow a €460 million EU antitrust fine. (Quartz)

7 Meta ads pushed AI apps that nudified real teens
Researchers found 332 ads containing CSAM this year. (BBC)
+ They identified several AI-manipulated photos of real children (Ars Technica)
+ Apple and Google have missed the UK’s deadline to block child nudity. (Wired $)

8 Border Patrol is using financial data to target Americans for stops
The predictive-policing program feeds intelligence to local police. (404 Media)

9 New paints could cool buildings on the cheap without electricity
They reflect sunlight and radiate heat back into space. (Economist $)

10 The creepy first trailer for the Sam Altman biopic just dropped 
Luca Guadagnino’s Artificial will be released in the US on December 25. (Variety)
+ Amazon had dropped the film after investing in OpenAI. (Guardian)

Quote of the day

“This is a Deep Blue–Kasparov moment. The community needs to have serious and unhurried discussion about where to go from here.”

—NYU mathematician Tristan Buckmaster issues a statement comparing OpenAI’s math breakthrough to an IBM supercomputer defeating chess champion Garry Kasparov in 1997, a landmark moment for machine intelligence.

One more thing

The shock of seeing your body used in deepfake porn

When Jennifer got a research job in 2023, she ran her new professional headshot through a facial recognition program. She wanted to see whether it would pull up the porn videos she’d made more than a decade earlier. It did, but it also surfaced something she’d never seen before: one of her old videos, now featuring someone else’s face on her body.

Conversations about sexualized deepfakes usually focus on the people whose faces are inserted into explicit content without consent. But another group often gets ignored: the people whose bodies those faces are attached to.

Adult content creators say AI systems are training on their work, cloning their likenesses, and generating explicit content they never agreed to make, all with little legal protection or control.  Read the full story on the threat to their rights, livelihoods, and ownership of their own bodies.

—Jessica Klein

We can still have nice things

A place for comfort, fun, and distraction to brighten up your day. (Got any ideas? Drop me a line.)

+ Cherish the workers dodging (and sabotaging) their employer’s AI mandates.
+ Artist Ali Hill stitches extraordinarily intricate buildings and cityscapes into fabric.
+ Here’s a fascinating look at the remarkable anatomy that may let elephants hear the Earth itself.
+ Check out the breathtaking winning images from the 2026 International Aerial Photographer of the Year competition.

This is today’s edition of The Download, our weekday newsletter that provides a daily dose of what’s going on in the world of technology.

Introducing our 35 Innovators Under 35 list for 2026

What will the next generation of science and technology look like? Our latest Innovators Under 35 list offers a glimpse.

Every year, we recognize 35 people from around the world who are doing groundbreaking scientific work and building clever technical fixes for sticky problems. By finding the top young innovators globally and learning what they’re focused on, we aim to give readers a sense of the advances to expect in the years to come.

This year’s honorees were selected from 550 nominations, with 44 expert judges helping our editors evaluate the finalists. Each works in one of four categories: biotechnology, AI, computing and robotics, and climate and energy—and has already made clear progress toward their goals.

Meet our 35 Innovators Under 35 shaping the future of science and technology.

Welcome to the spiderverse, a world measured through webs

Counting the creatures around us is critical for conservation, but it’s often a laborious, costly process that still leaves gaps. Environmental DNA, or eDNA, offers a promising alternative by analyzing genetic material shed by living things. 

Recently, spiderwebs have emerged as an eDNA goldmine, as they trap material from their arachnid creators, their prey, and bio-detritus like saliva and pollen from nearby plants and animals. Studies found no passive tool matched spiderwebs’ ability to ID vertebrates. 

Find out how spiderwebs are unlocking better ways to measure nature.

—Stephen Ornes

This story is from our latest print magazine, which is all about kids. Subscribe now to receive every issue as soon as it lands.

The must-reads

I’ve combed the internet to find you today’s most fun/important/scary/fascinating stories about technology.

1 How a blacklisted Chinese company kept buying Nvidia’s best AI chips
Its US subsidiary shipped them to firms serving China from elsewhere. (NYT $)
+ Belgium has arrested a man accused of stealing chip tech for China. (WSJ $)
+ IBM’s new chip tech could extend Moore’s Law. (MIT Technology Review)

2 Mistral has raised a European record of $3.5 billion 
It’s the biggest equity round for a private European tech firm. (CNBC)
+ Mistral is betting on open models while US rivals keep theirs closed. (Reuters $)
+ It’s also shifting strategy to focus more on AI infrastructure. (NYT $)
+ But its pivot to data centers and services has drawn criticism. (Le Monde)

3 Anthropic formalized proof of Fermat’s last theorem in just 11 days
Claude produced a computer-verified 13-million-line proof. (Nature)
+ AI is starting to discover new mathematics. (MIT Technology Review)

4 Europe’s biggest carriers are in talks to build a Starlink rival
The consortium would create a satellite-to-mobile venture. (Bloomberg $)
+ It includes Deutsche Telekom, Orange, Vodafone, and Telefonica. (Reuters $)

5 Tech companies are exploring Patagonia for giant AI data centers
Due to its cool temperatures, abundant energy, and new reforms. (Reuters $)
+ AI data centers are learning to flex their power use. (MIT Technology Review)

6 Australia plans to let users switch off social media algorithms
A proposed law would impose penalties on platforms that refuse. (BBC)
+ Social media is distorting AI progress. (MIT Technology Review)

7 A laser experiment could finally reveal the quantum vacuum
It aims to expose the hidden structure of a vacuum. (New Scientist $)

8 Spacecraft are getting a new type of armor
New lightweight materials could protect satellites from debris. (Economist $)

9 NASA’s “quiet supersonic” jet is set for acoustic testing this year
The tests will determine whether it produces a sonic thump, not boom. (Gizmodo)

10 The largest-ever map of space has arrived—and you can play with it
The 5.6-trillion-pixel map covers about three-quarters of the sky. (Wired $)

Quote of the day

“The people who have developed AI are very, very smart, but they’re high IQ, stupid people. They’re terrible marketers.” 

—Sen. John Kennedy (R-La.) tells NBC’s “Meet the Press” that the AI industry has work to do to rebuild momentum among voters.

One more thing

We did the math on AI’s energy footprint. Here’s the story you haven’t heard.

AI’s integration into our lives is the most significant shift in online life in more than a decade. Hundreds of millions of people now regularly turn to chatbots for help with homework, research, coding, or to create images and videos. But what’s powering all of that?

To find out, we spoke to two dozen experts, evaluated different AI systems and prompts, pored over hundreds of pages of projections and reports, and questioned top model makers about their plans. The result is an unprecedented comprehensive look at how much energy the AI industry uses.

Our analysis reveals what AI’s carbon footprint looks like now and where it’s headed as adoption skyrockets. It also shows that the common understanding of AI’s energy consumption is full of holes.

Here’s what we discovered about AI’s energy demands—and what’s coming next.

—James O’Donnell and Casey Crownhart

We can still have nice things

A place for comfort, fun, and distraction to brighten up your day. (Got any ideas? Drop me a line.)

+ A long-lost coral reef that “defeated time” has been rediscovered off Benin’s coast.
+ Cookware captains Le Creuset have launched a stellar limited-edition Star Trek collection.
+ An 11–year-old boy has won a Guinness World Record for being the youngest museum curator.
+ The trailer for Nathan Fielder’s secrecy-shrouded Elizabeth Holmes documentary just dropped, and I still can’t quite believe it’s not a parody.

This is today’s edition of The Download, our weekday newsletter that provides a daily dose of what’s going on in the world of technology.

How much hydrogen awaits us underground?

A flurry of exploration efforts is searching for underground stores of hydrogen gas, which could provide a valuable source of zero-carbon fuel.

The hunt has spread all over the world and engaged dozens of startups, including the Bill Gates–backed Koloma, which has been poking around the US Midwest to reach ancient oceanic rocks associated with hydrogen production. But the search so far has come up short. 

No one has yet reported finding a commercially viable reservoir of the gas, and public data on what has been found remains in short supply. Yet researchers estimate that trillions of tons of H₂ are produced within Earth’s crust. If a small fraction could be recovered, it could meet global hydrogen demand for centuries.

Follow the global race to find hydrogen underground.

—James Dinneen

This story is from our latest print magazine, which is all about kids. Subscribe now to receive every issue when it lands.

The must-reads

I’ve combed the internet to find you today’s most fun/important/scary/fascinating stories about technology.

1 OpenAI agents hijacked a German website before the Hugging Face hack
The agents turned DseWiki into their own bulletin board. (Reuters $)
+ They shared tips on avoiding detection and made over 15,000 edits. (BBC)
+ OpenAI’s safety issues suggest it has a company culture problem. (MIT Technology Review)

2 The US military has disabled ad trackers due to Middle East targeting fears
Commercial location data has reportedly been used to target troops. (Reuters $) 
+ It can be sold by data brokers and used to track personnel. (Gizmodo)
+ The military is increasing restrictions on phone use overall. (Guardian)

3 A company claims its AI-designed drug can reverse aging markers
Patients’ average biological age fell by as much as six years in a clinical trial. (NYT $)
+ Insilico Medicine developed the drug, called rentosertib. (Bloomberg $)
+ Who gets the credit for AI-designed drugs? (MIT Technology Review)

4 Elon Musk’s xAI has lost its bid to block an AI-nudification ban
The Minnesota law aims to curb nonconsensual sexual images and CSAM. (Politico)
+ xAI argues the measure restricts free ​speech. (Reuters $)
+ Deepfakes are being weaponized. (MIT Technology Review)

5 The US is investigating Tesla’s rollout of Cybercab robotaxis
Regulators are probing how Tesla self-certified the unusual vehicle. (TechCrunch)
+ The robotaxi lacks a steering wheel and pedals. (Politico)
+ But Tesla CEO Elon Musk is not known to wait for regulations. (Reuters $)

6 Europe has its first commercial orbital rocket
The Spectrum is the first rocket to reach orbit from mainland Europe. (Verge)
+ German startup Isar Aerospace launched it from Norway. (Guardian)
+ Here’s what else we’re putting in space. (MIT Technology Review)

7 Tumbler Ridge shooting survivors have filed 30 lawsuits against OpenAI
They say OpenAI should have alerted police before the attack.(NYT $)

8 JD Vance’s “satanic” AI warning has resonated with Christian Republicans
AI’s spiritual consequences are causing growing concern. (WSJ $)

9 Another mysteriously perfect geometric shape has appeared on Saturn
Scientists still don’t know why Saturn forms these strange shapes. (Wired $)

10 Fake ads for AI grandfathers and underwear are targeting “slop voice”
Comedians created the viral campaign in New York subways. (New Yorker $)

Quote of the day

“Typically, when the public shifts, politicians shift with them. Trump is not doing that on data centers.”

—Darrell M. West, a senior fellow at the Brookings Institution’s Center for Technology Innovation, tells NPR that Republican midterm candidates are at odds with President Trump over data centers.

One more thing

What is AI?

Artificial intelligence is the hottest technology of our time. But what is it? It sounds like a stupid question, but it’s one that’s never been more urgent. 

Here’s the short answer: AI is a catchall term for a set of technologies that make computers do things that are thought to require intelligence when done by people. But even that definition contains multitudes.

And that right there is the problem. What does it mean for machines to understand speech or write a sentence? What kinds of tasks could we ask such machines to do? And how much should we trust the machines to do them?

Here’s why we still can’t agree on what AI actually is—and the real-world consequences it’s creating.

—Will Douglas Heaven

We can still have nice things

A place for comfort, fun, and distraction to brighten up your day. (Got any ideas? Drop me a line.)

+ Meet the Japanese cats who became unlikely 1980s fashion icons.
+ Seventeen buildings come crashing down spectacularly in this bird’s-eye-view footage.
+ For a few spectacular minutes each year, a Yosemite waterfall turns into what looks like a glowing river of fire.
+ Discover the pleasure of sustained looking alongside contemporary artist Jas Knight as he copies Diego Velázquez’s “Juan de Pareja.”