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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.

It’s pretty easy to get DeepSeek to talk dirty

AI companions like Replika are designed to engage in intimate exchanges, but people use general-purpose chatbots for sex talk too, despite their stricter content moderation policies. Now new research shows that not all chatbots are equally willing to talk dirty. DeepSeek is the easiest to convince. But other AI chatbots can be enticed too.

Huiqian Lai, a PhD student at Syracuse University, found vast differences in how mainstream models process sexual queries, from steadfast rejection to performative refusal followed by the requested sexually explicit content.

The findings highlight inconsistencies in LLMs’ safety boundaries that could, in certain situations, become harmful. Read the full story.

—Rhiannon Williams

Calorie restriction can help animals live longer. What about humans?

Living comes with a side effect: aging. Despite what you might hear on social media, there are no drugs that are known to slow or reverse human aging. But there’s some evidence to support another approach: cutting back on calories.

Reducing your intake of calories and fasting can help with weight loss. But they may also offer protection against some health conditions. And some believe such diets might even help you live longer—a finding supported by new research out this week.

However, the full picture is not so simple. Let’s take a closer look at the benefits—and risks—of caloric restriction.

—Jessica Hamzelou

This article first appeared in The Checkup, MIT Technology Review’s weekly biotech newsletter. To receive it in your inbox every Thursday, and read articles like this first, sign up here.


How a 30-year-old techno-thriller predicted our digital isolation

Thirty years ago, Irwin Winkler’s proto–cyber thriller, The Net, was released. It was 1995, commonly regarded as the year Hollywood discovered the internet. Sandra Bullock played a social recluse and computer nerd for hire named Angela Bennett, who unwittingly uncovers a sinister computer security conspiracy. She soon finds her life turned upside down as the conspiracists begin systematically destroying her credibility and reputation.

While the villain of The Net is ultimately a nefarious cybersecurity software company, the film’s preoccupying fear is much more fundamental: If all of our data is digitized, what happens if the people with access to that information tamper with it? Or weaponize it against us? Read the full story.

—Tom Humberstone

This story is from the next print edition of MIT Technology Review, which explores power—who has it, and who wants it. It’s set to go live on Wednesday June 25, so subscribe & save 25% to read it and get a copy of the 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 Donald Trump has extended TikTok’s deadline for a third time 
He’s granted it yet another 90-day reprieve. (WSJ $)
+ He says he needs more time to broker a deal. (AP News)
+ But it’s not clear if Trump’s orders are even legal. (Bloomberg $)

2 A SpaceX rocket exploded on the test stand
Sending a giant fireball into the Texas sky. (CNN)
+ It’s the fourth SpaceX explosion this year. (WP $)
+ The company has a lot of issues to resolve before it can ever reach Mars. (Ars Technica)

3 Checking a web user’s age is technologically possible
An Australian trial may usher in a ban on under-16s accessing social media. (Bloomberg $)
+ The findings are a blow to social media firms who have been fighting to avoid this. (Reuters)

4 Chinese companies are urgently searching for new markets
And Brazil is looking like an increasingly attractive prospect. (NYT $)
+ Chinese carmaker BYD is sending thousands of EVs there. (Rest of World)

5 How Mark Zuckerberg came to love MAGA
His recent alignment with the manosphere hasn’t come as a shock to insiders. (FT $)

6 We shouldn’t be using AI for everything
Using chatbots without good reason is putting unnecessary strain on the planet. (WP $)
+ AI companies are remaining tight-lipped over their energy use. (Wired $)
+ We did the math on AI’s energy footprint. Here’s the story you haven’t heard. (MIT Technology Review)

7 This Chinese courier company is out-delivering Amazon
J&T Express fulfills orders from giants like Temu and Shein. (Rest of World)

8 How Amazon plans to overhaul Alexa
With AI, AI, and some more AI. (Wired $)

9 How smart should today’s toys be?
The last AI-powered Barbie was not a resounding success. (Vox)

10 This French app allows you to rent household appliances
No raclette machine? No problem. (The Guardian)

Quote of the day

“So Mr “Art of the Deal” has not made a TikTok deal (again).”

—Adam Cochran, founder of venture capital firm Cinneamhain Ventures, questions Donald Trump’s credentials in a post on X.

One more thing

China wants to restore the sea with high-tech marine ranches

A short ferry ride from the port city of Yantai, on the northeast coast of China, sits Genghai No. 1, a 12,000-metric-ton ring of oil-rig-style steel platforms, advertised as a hotel and entertainment complex.

Genghai is in fact an unusual tourist destination, one that breeds 200,000 “high-quality marine fish” each year. The vast majority are released into the ocean as part of a process known as marine ranching.

The Chinese government sees this work as an urgent and necessary response to the bleak reality that fisheries are collapsing both in China and worldwide. But just how much of a difference can it make? Read the full story.

—Matthew Ponsford

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 or skeet ’em at me.)

+ How many art terms are you familiar with? Time to brush up.
+ They can make a museum out of pretty much anything these days.
+ Beekeeping isn’t just beneficial for the bees—it could help your mental health, too 🐝
+ The Sculptor galaxy is looking ridiculously beautiful right now.

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In April, Mark Zuckerberg, as tech billionaires are so fond of doing these days, pontificated at punishing length on a podcast. In the interview, he addressed America’s loneliness epidemic: “The average American has—I think it’s fewer than three friends. And the average person has demand for meaningfully more. I think it’s like 15 friends or something, right?”

Before you’ve had a moment to register the ominous way in which he frames human connection in such bleak economic terms, he offers his solution to the loneliness epidemic: AI friends. Ideally AI friends his company generates.


“It’s like I’m not even me anymore.”
—Angela Bennett, The Net (1995)


Thirty years ago, Irwin Winkler’s proto–cyber thriller, The Net, was released. It was 1995, commonly regarded as the year Hollywood discovered the internet. Sandra Bullock played a social recluse and computer nerd for hire named Angela Bennett, who unwittingly uncovers a sinister computer security conspiracy. She soon finds her life turned upside down as the conspiracists begin systematically destroying her credibility and reputation. Her job, home, finances, and very identity are seemingly erased with some judicial tweaks to key computer records.

Bennett is uniquely—conveniently, perhaps—well positioned for this identity annihilation. Her mother, in the throes of dementia, no longer recognizes her; she works from home for clients who have never met her; her social circle is limited to an online chat room; she orders takeout from Pizza.net; her neighbors don’t even know what she looks like. Her most reliable companion is the screen in front of her. A wild, unimaginable scenario that I’m sure none of us can relate to.


“Just think about it. Our whole world is sitting there on a computer. It’s in the computer, everything: your DMV records, your Social Security, your credit cards, your medical records. It’s all right there. Everyone is stored in there. It’s like this little electronic shadow on each and every one of us, just begging for someone to screw with, and you know what? They’ve done it to me, and you know what? They’re gonna do it to you.”
—Angela Bennett, The Net


While the villain of The Net is ultimately a nefarious cybersecurity software company, the film’s preoccupying fear is much more fundamental: If all of our data is digitized, what happens if the people with access to that information tamper with it? Or weaponize it against us? 

This period of Hollywood’s flirtation with the internet is often referred to as the era of the technophobic thriller, but that’s a surface-level misreading. Techno-skeptic might be more accurate. These films were broadly positive and excited about new technology; it almost always played a role in how the hero saved the day. Their bigger concern was with the humans who had ultimate control of these tools, and what oversight and restrictions we should place on them.

In 2025, however, the most prescient part of The Net is Angela Bennett’s digital alienation. What was originally a series of plausible enough contrivances to make the theft of her identity more believable is now just part of our everyday lives. We all bank, shop, eat, work, and socialize without necessarily seeing another human being in person. And we’ve all been through covid lockdowns where that isolation was actively encouraged. For a whole generation of young people who lived through that, socializing face to face is not second nature. In 2023, the World Health Organization declared loneliness to be a pressing global health threat, estimating that one in four older adults experience social isolation and between 5% and 15% of adolescents experience loneliness. In the US, social isolation may threaten public health more seriously than obesity. 

The Net appeared at a time when the internet was only faintly understood as the new Wild West … In that sense, it remains a fascinating time capsule of a moment when the possibilities to come felt endless, the outlook cautiously optimistic.

We also spend increasing amounts of time looking at our phones, where finely tuned algorithms aggressively lobby for more and more of our ad-revenue-­generating attention. As Bennett warns: “Our whole lives are on the computer, and they knew that I could be vanished. They knew that nobody would care, that nobody would understand.” In this sense, in 2025 we are all Angela Bennett. As Bennett’s digital alienation makes her more vulnerable to pernicious actors, so too are we increasingly at risk from those who don’t have, and have never had, our best interests at heart. 

To blame technology entirely for a rise in loneliness—as many policymakers are doing—would be a mistake. While it is unquestionably playing a part in exacerbating the problem, its outsize role in our lives has always reflected larger underlying factors. In Multitudes: How Crowds Made the Modern World (2024), the journalist Dan Hancox examines the ways in which crowds have been demonized and othered by those in power and suggests that our alienation is much more structural: “Whether through government cuts or concessions to the expansive ambitions of private enterprise, a key reason we have all become a bit more crowd-shy in recent decades is the prolonged, top-down assault on public space and the wider public realm—what are sometimes called the urban commons. From properly funded libraries to pleasant, open parks and squares, free or affordable sports and leisure facilities, safe, accessible and cheap public transport, comfortable street furniture and free public toilets, and a vibrant, varied, uncommodified social and cultural life—all the best things about city life fall under the heading of the public realm, and all of them facilitate and support happy crowds rather than sad, alienated, stay-at-home loners.”

Nearly half a century ago Margaret Thatcher laid out the neoliberal consensus that would frame the next decades of individualism: “There’s no such thing as society. There are individual men and women and there are families. And no government can do anything except through people, and people must look after themselves first.” 

TOM HUMBERSTONE

In keeping with that philosophy, social connectivity has been outsourced to tech companies for which the attention economy is paramount. “The Algo” is our new, capricious god. If your livelihood depends on engagement, the temptation is to stop thinking about human connection when you post, and to think more about what will satisfy The Algo to ensure a good harvest. 

How much will you trust an AI chatbot powered by Meta to be your friend? Answers to this may vary. Even if you won’t, other people are already making close connections with “AI companions” or “falling in love” with ChatGPT. The rise of “cognitive offloading”—of people asking AI to do their critical thinking for them—is already well underway, with many high school and college students admitting to a deep reliance on the technology. 

Beyond the obvious concern that AI “friends” are hallucinating, unthinking, obsequious algorithms that will never challenge you in the way a real friend might, it’s also worth remembering who AI actually works for. Recently Elon Musk’s own AI chatbot, Grok, was given new edicts that caused it to cast doubt on the Holocaust and talk about “white genocide” in response to unrelated prompts—a reminder, if we needed it, that these systems are never neutral, never apolitical, and always at the command of those with their hands on the code. 

I’m fairly lucky. I live with my partner and have a decent community of friends. But I work from home and can spend the majority of the day not talking to anyone. I’m not immune to feeling isolated, anxious, and powerless as I stare unblinking at my news feed. I think we all feel it. We are all Angela Bennett. Weaponizing that alienation, as the antagonists of The Net do, can of course be used for identity theft. But it can also have much more deleterious applications: Our loneliness can be manipulated to make us consume more, work longer, turn against ourselves and each other. AI “friendships,” if engaged with uncritically, are only going to supercharge this disaffection and the ways in which it can be abused.

It doesn’t have to be this way. We can withhold our attention, practice healthier screen routines, limit our exposure to doomscrolling, refuse to engage with energy-guzzling AI, delete our accounts. But, crucially, we can also organize collectively IRL: join a union or a local club, ask our friends if they need to talk. Hopelessness is what those in power want us to feel, so resist it.

The Net appeared at a time when the internet was only faintly understood as the new Wild West. Before the dot-com boom and bust, before Web 2.0, before the walled gardens and the theory of a “dead internet.” In that sense, it remains a fascinating time capsule of a moment when the possibilities to come felt endless, the outlook cautiously optimistic.

We can also see The Net’s influence in modern screen-life films like Searching, Host, Unfriended, and The Den. But perhaps—hopefully—its most enduring legacy will be inviting us to go outside, touch grass, talk to another human being, and organize. 


“Find the others.”
—Douglas Rushkoff, Team Human (2019)


Tom Humberstone is a comic artist and illustrator based in Edinburgh.

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Living comes with a side effect: aging. Despite what you might hear on social media or in advertisements, there are no drugs that are known to slow or reverse human aging. But there’s some evidence to support another approach: cutting back on calories.

Caloric restriction (reducing your intake of calories) and intermittent fasting (switching between fasting and eating normally on a fixed schedule) can help with weight loss. But they may also offer protection against some health conditions. And some believe such diets might even help you live longer—a finding supported by new research out this week. (Longevity enthusiast Bryan Johnson famously claims to eat his last meal of the day at 12pm.)

But the full picture is not so simple. Weight loss isn’t always healthy and neither is restricting your calorie intake, especially if your BMI is low to begin with. Some scientists warn that, based on evidence in animals, it could negatively impact wound healing, metabolism and bone density. This week let’s take a closer look at the benefits—and risks—of caloric restriction.

Eating less can make animals live longer. This remarkable finding has been published in scientific journals for the last 100 years. It seems to work in almost every animal studied—everything from tiny nematode worms and fruit flies to mice, rats, and even monkeys. It can extend the lifespan of rodents by between 15% and 60%, depending on which study you look at.

The effect of caloric restriction is more reliable than the leading contenders for an “anti-aging” drug. Both rapamycin (an immunosuppressive drug used in organ transplants) and metformin (a diabetes drug) have been touted as potential longevity therapeutics. And both have been found to increase the lifespans of animals in some studies.

But when scientists looked at 167 published studies of those three interventions in research animals, they found that caloric restriction was the most “robust.” According to their research, published in the journal Aging Cell on Wednesday, the effect of rapamycin was somewhat comparable, but metformin was nowhere near as effective.

“That is a pity for the many people now taking off-label metformin for lifespan extension,” David Clancy, lecturer in biogerontology at Lancaster University, said in a statement. “Let’s hope it doesn’t have any or many adverse effects.” Still, for caloric restriction, so far so good.

At least it’s good news for lab animals. What about people? Also on Wednesday, another team of scientists published a separate review of research investigating the effects of caloric restriction and fasting on humans. That review assessed 99 clinical trials, involving over 6,500 adults. (As I said, caloric restriction has been an active area of research for a long time.)

Those researchers found that, across all those trials, fasting and caloric restriction did seem to aid weight loss. There were other benefits, too—but they depended on the specific approach to dieting. Fasting every other day seemed to help lower cholesterol, for example. Time-restricted eating, where you only eat within a specific period each day (à la Bryan Johnson), by comparison, seemed to increase cholesterol, the researchers write in the BMJ. Given that elevated cholesterol in the blood can lead to heart disease, it’s not great news for the time-restricted eaters.

Cutting calories could also carry broader risks. Dietary restriction seems to impair wound healing in mice and rats, for example. Caloric restriction also seems to affect bone density. In some studies, the biggest effects on lifespan extension are seen when rats are put on calorie-restricted diets early in life. But this approach can affect bone development and reduce bone density by 9% to 30%.

It’s also really hard for most people to cut their caloric intake. When researchers ran a two-year trial to measure the impact of a 25% reduction in caloric intake, they found that the most their volunteers could cut was 12%. (That study found that caloric restriction reduces markers of inflammation, which can be harmful when it’s chronic, and had only a small impact on bone density.)

Unfortunately, there’s a lot we still don’t really understand about caloric restriction. It doesn’t seem to help all animals live longer—it seems to shorten the lifespan of animals with certain genetic backgrounds. And we don’t know whether it extends the lifespan of people. It isn’t possible to conduct a randomized clinical trial in which you deprive people of food from childhood and then wait their entire lives to see when they die.

It is notoriously difficult to track or change your diet. And given the unknowns surrounding caloric restriction, it’s too soon to make sweeping recommendations, particularly given that your own personal biology will play a role in any benefits or risks you’ll experience. Roll on the next round of research.

This article first appeared in The Checkup, MIT Technology Review’s weekly biotech newsletter. To receive it in your inbox every Thursday, and read articles like this first, sign up here.

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