If you’re a longtime reader, you probably know that our newsroom selects 10 breakthroughs every year that we think will define the future. This group exercise is mostly fun and always engrossing, but at times it can also be quite difficult. 

We collectively pitch dozens of ideas, and the editors meticulously review and debate the merits of each. We agonize over which ones might make the broadest impact, whether one is too similar to something we’ve featured in the past, and how confident we are that a recent advance will actually translate into long-term success. There is plenty of lively discussion along the way.  

The 2026 list will come out on January 12—so stay tuned. In the meantime, I wanted to share some of the technologies from this year’s reject pile, as a window into our decision-making process. 

These four technologies won’t be on our 2026 list of breakthroughs, but all were closely considered, and we think they’re worth knowing about. 

Male contraceptives 

There are several new treatments in the pipeline for men who are sexually active and wish to prevent pregnancy—potentially providing them with an alternative to condoms or vasectomies. 

Two of those treatments are now being tested in clinical trials by a company called Contraline. One is a gel that men would rub on their shoulder or upper arm once a day to suppress sperm production, and the other is a device designed to block sperm during ejaculation. (Kevin Eisenfrats, Contraline’s CEO, was recently named to our Innovators Under 35 list). A once-a-day pill is also in early-stage trials with the firm YourChoice Therapeutics. 

Though it’s exciting to see this progress, it will still take several years for any of these treatments to make their way through clinical trials—assuming all goes well.

World models 

World models have become the hot new thing in AI in recent months. Though they’re difficult to define, these models are generally trained on videos or spatial data and aim to produce 3D virtual worlds from simple prompts. They reflect fundamental principles, like gravity, that govern our actual world. The results could be used in game design or to make robots more capable by helping them understand their physical surroundings. 

Despite some disagreements on exactly what constitutes a world model, the idea is certainly gaining momentum. Renowned AI researchers including Yann LeCun and Fei-Fei Li have launched companies to develop them, and Li’s startup World Labs released its first version last month. And Google made a huge splash with the release of its Genie 3 world model earlier this year. 

Though these models are shaping up to be an exciting new frontier for AI in the year ahead, it seemed premature to deem them a breakthrough. But definitely watch this space. 

Proof of personhood 

Thanks to AI, it’s getting harder to know who and what is real online. It’s now possible to make hyperrealistic digital avatars of yourself or someone you know based on very little training data, using equipment many people have at home. And AI agents are being set loose across the internet to take action on people’s behalf. 

All of this is creating more interest in what are known as personhood credentials, which could offer a way to verify that you are, in fact, a real human when you do something important online. 

For example, we’ve reported on efforts by OpenAI, Microsoft, Harvard, and MIT to create a digital token that would serve this purpose. To get it, you’d first go to a government office or other organization and show identification. Then it’d be installed on your device and whenever you wanted to, say, log into your bank account, cryptographic protocols would verify that the token was authentic—confirming that you are the person you claim to be. 

Whether or not this particular approach catches on, many of us in the newsroom agree that the future internet will need something along these lines. Right now, though, many competing identity verification projects are in various stages of development. One is World ID by Sam Altman’s startup Tools for Humanity, which uses a twist on biometrics. 

If these efforts reach critical mass—or if one emerges as the clear winner, perhaps by becoming a universal standard or being integrated into a major platform—we’ll know it’s time to revisit the idea.  

The world’s oldest baby

In July, senior reporter Jessica Hamzelou broke the news of a record-setting baby. The infant developed from an embryo that had been sitting in storage for more than 30 years, earning him the bizarre honorific of “oldest baby.” 

This odd new record was made possible in part by advances in IVF, including safer methods of thawing frozen embryos. But perhaps the greater enabler has been the rise of “embryo adoption” agencies that pair donors with hopeful parents. People who work with these agencies are sometimes more willing to make use of decades-old embryos. 

This practice could help find a home for some of the millions of leftover embryos that remain frozen in storage banks today. But since this recent achievement was brought about by changing norms as much as by any sudden technological improvements, this record didn’t quite meet our definition of a breakthrough—though it’s impressive nonetheless.

We have some exciting news: Nominations are now open for MIT Technology Review’s 2026 Innovators Under 35 competition. This annual list recognizes 35 of the world’s best young scientists and inventors, and our newsroom has produced it for more than two decades. 

It’s free to nominate yourself or someone you know, and it only takes a few moments. Submit your nomination before 5 p.m. ET on Tuesday, January 20, 2026. 

We’re looking for people who are making important scientific discoveries and applying that knowledge to build new technologies. Or those who are engineering new systems and algorithms that will aid our work or extend our abilities. 

Each year, many honorees are focused on improving human health or solving major problems like climate change; others are charting the future path of artificial intelligence or developing the next generation of robots. 

The most successful candidates will have made a clear advance that is expected to have a positive impact beyond their own field. They should be the primary scientific or technical driver behind the work involved, and we like to see some signs that a candidate’s innovation is gaining real traction. You can look at last year’s list to get an idea of what we look out for.

We encourage self-nominations, and if you previously nominated someone who wasn’t selected, feel free to put them forward again. Please note: To be eligible for the 2026 list, nominees must be under the age of 35 as of October 1, 2026. 

Semifinalists will be notified by early March and asked to complete an application at that time. Winners are then chosen by the editorial staff of MIT Technology Review, with input from a panel of expert judges. (Here’s more info about our selection process and timelines.) 

If you have any questions, please contact tr35@technologyreview.com. We look forward to reviewing your nominations. Good luck! 

As Europe gradually phases out heavy-duty diesel trucks, Traton is gearing up production of its electric models. The company is also helping to install hundreds of public chargers to aid the growth of electric freight transport across Europe. 

Every day, trucks carry many millions of tons of cargo down roads and highways around the world. Nearly all run on diesel and make up one of the largest commercial sources of carbon emissions. Traton is producing a wide variety of zero-emission trucks that could help clean up this sector while also investing in a Europe-wide advanced charging network so other manufacturers can more easily follow suit. 

In Europe especially, the next decade could see tremendous growth in electric truck adoption. New CO2 emission standards require new diesel trucks to essentially be phased out of production by 2040. And given that trucks typically operate for around 15 years, more owners will be considering electric models for their next purchase. 

Today, Traton is a company in transition. A subsidiary of Volkswagen, it is made up of a collection of commercial vehicle brands, including Scania, MAN, and International. While it still manufactures conventional trucks that run on fossil fuels, it’s making rapid progress in the EV space. Some of Scania’s long-haul electric semis can travel about 350 miles before needing to recharge, for example. 

Its EV models are also starting to pick up in terms of sales. In the first half of 2025, Traton sold 1,250 electric models globally, which was twice as many as during the same period last year. That puts it not far behind Volvo, another market leader. Traton is now ramping up production—MAN recently opened a new factory line that can assemble electric and diesel trucks interchangeably. That should also help bring costs down, key to success for the sector—today, the price of an electric truck can be several times higher than for diesel ones. 

What’s more, Traton is working to install hundreds of publicly available chargers across Europe through an industry partnership called Milence. That group has also invested in high-powered chargers that can deliver more than 1 megawatt of power to heavy-duty trucks, allowing trucks to recharge in 45 minutes or less (for comparison, rapid chargers available for cars today deliver between 50 and 350 kilowatts).

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Key indicators

• Industry: Electric vehicles 
• Founded: 2015 
• Headquarters: Munich, Germany
• Notable fact: One of Traton’s subsidiaries is a leading school bus manufacturer in the US and Canada, where it debuted its first electric school bus in 2021.

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Potential for impact 

Moving freight produces about 8 percent of global greenhouse gas emissions. Most of that pollution (65%) comes from trucks and vans—more than cargo ships, trains, and planes combined. And the World Economic Forum expects demand for road freight will triple by 2050. 

Electric trucks do have a climate impact from the mining and manufacturing processes required to build them. The source of electricity that powers them—whether renewable or fossil fuels—also matters. Even so, battery-electric trucks operating in Europe today reduce emissions on average by 63% compared with diesel trucks, according to an analysis by the nonprofit International Council on Clean Transportation. 

To mitigate climate change, the ICCT has said that all of the world’s major markets need to fully transition to selling only zero-emission trucks by 2040. Last year, about 90,000 electric trucks were sold globally; electric models accounted for less than 2.5 percent of total truck sales in the year prior. But market forces seem poised to accelerate this transition, and Traton is a small but growing player. 

Today, China leads the world in electric truck production and sales. In Europe, though, sales are expected to tick up as the EU requires manufacturers of heavy-duty rigs to slash CO2 emissions from their fleets by 90% by 2040, with progressive targets leading up to that level—the first of which kicked in as of July. 

Caveats

It’s early days for electric trucking, as supply chains and charging infrastructure are built out. A large electric truck requires four to six times as many battery packs as an electric car, and securing enough batteries has proven particularly difficult for many EV firms based outside of China, where most batteries are produced. 

To mitigate this risk, Traton is building its own battery production, starting with facilities in Södertälje, Sweden and Nuremberg, Germany—with plans to make 50,000 battery packs a year, which could power about 10,000 heavy-duty trucks. (The company declined to say what proportion of the batteries currently used in its trucks comes from China.) 

The company’s International brand, which operates in the US, could be hit by tariffs and see demand drop as the Trump administration moves to eliminate all greenhouse gas emissions standards for vehicles. 

No matter what, the competition will be fierce—every major European truck manufacturer offers electric models now, and Chinese firms have already expanded internationally and built a strong customer base in markets like South America through sales of electric buses. 

Next steps

For now, MAN is working toward its goal of delivering 1,000 electric trucks from its new manufacturing line by the year’s end. Looking ahead, Scania aims to begin selling its first heavy-duty truck compatible with megawatt chargers in February, with deliveries to follow later in the year. Through Milence, megawatt chargers are now available at three sites, in Sweden, Belgium, and the Netherlands, and will soon be installed at five more.