
The dogs in the Iditarod snow race run in subzero temperatures for days without frostbite, and far exceeding human endurance. How? CC-licensed photo by mcgeez on Flickr.
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A selection of 9 links for you. Ruff time. I’m @charlesarthur on Twitter. On Threads: charles_arthur. On Mastodon: https://newsie.social/@charlesarthur. On Bluesky: @charlesarthur.bsky.social. Observations and links welcome.
Internet starts to return in Iran after three-month blackout • WIRED
Matt Burgess:
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After more than 2,000 hours of government-imposed connectivity blackouts, there were signs on Tuesday that Iran’s internet is coming back—at least at very low levels.
Iran’s more than 90 million citizens have been without internet for the overwhelming majority of 2026, between the current blackout that began on February 28, when Israel and the United States attacked the country, and a previous internet shutdown enforced after widespread protests in January. The reconnection appears to have been ordered by officials in Iran’s government—but could only be temporary.
Though some Iranian networks appeared to be connecting to the global internet on Tuesday, researchers cautioned that the level of access was far below even the partial restoration that Tehran allowed at the end of January and throughout February—and it was drastically below Iran’s typical baseline of global internet connectivity from December 2025. Internet monitoring experts at Kentik, NetBlocks, and Cloudflare began documenting the partial restoration of connectivity in Iran beginning in the early afternoon local time on Tuesday.
“We do see some traffic coming from Iran,” says Amir Rashidi, a cybersecurity expert with the internet freedom organization Miaan Group. “Some providers have come back online, but it is still too early to say exactly what will happen. After the January protests, some providers were also reconnected, but around 50% of the country’s traffic remained down.”
Doug Madory, the director of internet analysis at Kentik, says, “We’re not seeing much change for the mobile networks.” Instead, he says, some fixed-line providers have appeared to be restoring their services, with the Telecommunication Company of Iran’s fiber-optic service around Tehran showing the “biggest gain.”
At the start of January, the Iranian regime entirely shut down internet connectivity as the state killed thousands of protesters who took to the streets demanding improvements to economic conditions in the country. The government then entirely cut connectivity again at the end of February when the United States and Israel went to war in Iran—leaving millions of Iranians unable to contact their families, damaging the local economy, and prohibiting news and video footage about the war from getting into and out of the country. The limited reconnection of internet services on Tuesday comes as the US government continues to negotiate with Iran about a permanent end to the war.
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What hasn’t been explained is: why? The shutdown is explicable, but why bring it back now? Iran is reckoned to be losing $20-$30m for every day the internet is off, so that’s between $1.6bn and $2.5bn in lost revenues. Nowhere near what’s going on with oil, but still important.
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Claude Code’s creator on the end of the software engineer • Platformer
Casey Newton interviews Boris Cherny, who created Claude Code at Anthropic; it started as a little bit of code to find out what piece of music was playing on his Music app, and it wrote it using a language (Applescript) he’s never used. Which intrigued him:
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Casey Newton: A couple of last questions on software engineering. I’ve been asking all our guests: if a 22-year-old just finished a CS degree this month and came to you and said, “Okay, now what?” — what do you say? Is there an entry-level job waiting for them, or do they need to think differently about the first part of their career?
Boris Cherny: If you want to work at a company, you can totally still do that — there are entry-level jobs, there’s a lot you can do. But if you’re at all entrepreneurial, go start a startup. There has never been a better time in history to do it; it’s the golden age. You and your agents can build a giant company. People are building billion-dollar companies with just a few people. Claude Code started as just a few of us. We have so many customers building really big businesses with one or two or three people. One person with the right idea has so much leverage. I couldn’t imagine a better time to go into it.
Newton: That’s interesting, because the view we often get from the AI world is that model capabilities are advancing so quickly that maybe we won’t even have companies in five years. But you think that, at least for now, there’s still plenty of room to start a company.
Cherny: At least for the next few years. If you trace out the exponential, it gets really weird — there’s a version where the idea of jobs doesn’t make sense anymore, or companies don’t, or software doesn’t. But in the meantime there’s so much to do. We’re all here figuring out what the model means and what it can do, so you might as well be one of the people exploring the frontier.
Newton: Last one on engineering. Three years from now, do you think we’ll see more engineers, fewer engineers, or will it be impossible to answer because we might not be calling them engineers anymore?
Cherny: I don’t think we’re going to call them engineers. But if we talk about people writing code or using agents to write code, I think there will be 100 times more of them than there are today. That’s my prediction.
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Strange world to contemplate. But this feels like it’s moving much faster than any revolution in the past. The only limiter is the availability of memory and servers and data centres.
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The geometry of superior performance • Nick Mark
Nick Mark:
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Human athletic achievement is impressive. Elite marathoners sustain ~75–85% VO₂ max [the maximum rate of oxygen consumption during peak exercise] for hours. Humans can outrun horses in extreme heat and over distance. But evolution has optimized humans for endurance efficiency rather than for maximum oxygen flux. How do we compare to other animals and what can we learn about physiology from their adaptations?
Every March, teams of sled dogs depart Willow, Alaska on the Iditarod: a 938 mile race to Nome, run in legs totaling roughly 16 hours of effort per day, over 8–11 days (the current record is 7 days, 14 hours). The dogs run in temperatures that can drop below −40°C, consuming 10,000–12,000 kcal per day. They do not develop the rhabdomyolysis [destruction of striated muscle cells] that would destroy a human athlete attempting equivalent work.
Published VO₂max values for sled dogs reach 198 ml/kg/min. Unpublished measurements on Iditarod-trained sled dogs report up to 200–240 ml/kg/min — roughly 2.5 to 3 times the best human values.
How?
The sled dog’s adaptations hit nearly every node in the cascade simultaneously. Cardiac output is enormous, driven by a massive stroke volume. Red blood cell mass is high at baseline, and splenic contraction during exercise releases a stored erythrocyte reserve, acutely boosting oxygen-carrying capacity in a way that amounts to endogenous blood transfusion. Metabolic flexibility is extraordinary: sled dogs oxidize fat at rates that would be impossible in humans, shifting to near-complete fat dependence within the first day of sustained effort and maintaining that state for days without the glycogen depletion that floors human performance (”hitting the wall”).
Their rhabdomyolysis resistance is worth its own note: Dogs running the Iditarod accumulate muscle damage markers that would indicate severe injury in a human, yet somehow recover between legs and finish the race. The mechanisms (enhanced heat shock protein expression, differences in membrane repair kinetics, local anti-inflammatory adaptations in type I fibres) are not fully elucidated, but may someday lead to clinically relevant insights.
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There’s plenty more, including antelopes, bats, hummingbirds, even bumblebees. The challenge is that oxygen demand rises cubically, while delivery only goes up with surface area – two-dimensionally, in effect.
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Amid a scam crackdown, crypto giants keep fueling bitcoin ATMs • ICIJ
Spencer Woodman:
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Bitcoin ATMs, the now-ubiquitous machines in gas stations and smoke shops that convert physical cash to cryptocurrency, are in trouble.
Over the past few months, the Canadian government announced a proposal to ban the scam-prone machines while Tennessee, Minnesota and Indiana passed legislation to outlaw them. Just last week, the world’s largest operator of these ATMs, Bitcoin Depot, filed for bankruptcy, citing litigation and government action. Experts and authorities have for years warned about the machines’ heavy use by criminals, who rely on them as a convenient means to collect funds from scam victims.
But as the crackdown on crypto ATMs widens, one critical aspect of the scam ecosystem has escaped scrutiny: the crypto giants that have enabled these ATM operations through massive transfers of bitcoin. Because these machines often take in cash and convert that cash to bitcoin, the crypto necessary to make such conversions are essential to the ATM firms.
At ICIJ’s request, a group of cryptocurrency investigators traced billions of dollars in bitcoin transfers from brand-name crypto firms directly to the coffers of ATM companies, even as authorities issued increasingly dire warnings about potential criminal activity. ICIJ found that after attorneys general in Massachusetts, Iowa and Washington, DC, alleged that top ATM operators were dealing heavily in scam transactions, major crypto companies continued selling them big sums of bitcoin.
This included US-based exchange Kraken, which has transferred at least $1.1bn worth of bitcoin to crypto ATM operators in recent years. ICIJ found that Kraken sent the ATM operator Athena Bitcoin at least $17m worth of cryptocurrency after District of Columbia authorities singled out its machines last September.
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People often put notices on those “ATMs” saying things like “if you’ve been told to come here and put some money in, it’s a scam”.
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Bangladesh measles cases: hundreds of children die within months • BBC News
Caroline Davies:
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In just over two months, the number of suspected cases of measles have reached over 60,000 in Bangladesh, according to the health ministry. The exact number has not been confirmed, as many are waiting for results from the laboratory.
Highly contagious, measles spreads quickly through coughs and sneezes and is particularly dangerous for unvaccinated young children under the age of five.
There are multiple reports of parents struggling to find space for their sick children in Bangladesh’s hospitals.
UNICEF told the BBC that during field visits the hospitals they went to were overwhelmed. They say that their staff are helping to isolate and triage children arriving at hospitals where such measures are lacking.Where local health clinics can’t help, many people are travelling to the cities, hoping the hospitals there will be able to.
“Poor people do not usually come to government hospitals until the last moment, as they have to buy medicine and tests,” Dr Mushtaq Husain, former Principal Scientific Officer at the Institute of Epidemiology Disease Control and Research says.If healthcare were better resourced at a local level, he adds, fewer would need emergency hospitalisation.
“It feels like a bit of a perfect storm,” Rana Flowers, Bangladesh country head for UNICEF said during a press conference.
Flowers explained that the agency had identified several factors which increased the risk of infection, including pockets of cases since 2023 where children were missing out on routine vaccination, high population density in certain areas – especially Dhaka or Cox’s Bazar – and big population movements for holidays.But one element in particular has stood out: delays ordering vaccines.
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In richer parts of the world we have the luxury of forgetting about this.
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Will AI achieve consciousness? I’m mathematically sure it won’t • Slate
Noah Giansiracusa:
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Before I weigh in on this as a mathematician, let’s turn back to [railroad magnate Leland] Stanford [who wanted to know if a horse’s feet all left the ground during its gallop].
To understand the mechanics of the horse’s gait, his team placed a series of cameras along a stretch of dirt road on what would later become the university’s campus. The cameras were attached to trip wires so that when the horse passed each one, it would take a perfectly timed photograph.
The clarifying photos would go on to generate something even more exciting for the photographer, Eadweard Muybridge. To display his photographs in rapid succession, Muybridge invented a device that birthed the motion picture. Audiences were wowed by the illusion of motion that emerged in this relatively simple manner. Wowed but not fooled, for everyone understood what was happening inside Muybridge’s machine: Still photos were displayed one after the other.
As this technology developed, the photographs became more detailed and the animations swifter and smoother. With frame rates beyond what our eye can perceive, it did not take long for movies to appear nearly as realistic as life itself. But no matter how closely the horses in movies resemble the horses we see in nature, nobody argued that movies create living horses. We know that movies are just sequences of lifeless images.
Flash forward to the present, and we have a remarkable parallel: AI chatbots provide a convincing illusion of consciousness, but we know they are just a sequence of lifeless math calculations. They are no more conscious than the horse in Muybridge’s animation is alive. The main difference is that people could easily look inside Muybridge’s machine to see the photographs underlying his movie. Most people don’t look inside AI chatbots. But if they did, they would see that it’s essentially the same story—an AI chatbot is just a mathematical flip-book.
…When a chatbot isn’t actively responding to your prompt, it sits around waiting, doing absolutely nothing. Not thinking, feeling, experiencing self-awareness or consciousness or anything else. Until your prompt comes in, the chatbot is just a big fancy recipe, vacantly waiting for someone to do something with it. When your prompt does arrive, the chatbot merely translates it to a number, pipes this number through a giant formula, then translates the resulting number back to text. That’s all.
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I think the fallacy in this argument is: what is (what we call) consciousness except the ticking over of the biological systems essential to keeping our body going? Our brains and nervous systems are never quiet because to stop is to die. Each neuron does a sort of maths calculation (chemical, analogue) to determine how to respond to input. This doesn’t feel like a fruitful avenue for refuting claims about AI consciousness.
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Huawei unveils new semiconductor principle: the Tau (τ) scaling law • Trendforce
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The Tau Scaling Law proposes replacing traditional “geometric scaling” with “time (τ) scaling”, aiming to systematically reduce time constants across semiconductor systems. Through innovations like LogicFolding architecture, the approach seeks to continuously compress signal propagation delays and increase transistor density, enabling sustained advances in semiconductors and electronic systems.
In recent years, Moore’s Law has faced mounting pressure from both physical limitations and diminishing economic returns. As the pace of transistor miniaturisation slows and the cost advantages of geometric scaling fade, the global semiconductor industry has increasingly grappled with how to move beyond conventional process pathways and establish a sustainable route for continued performance improvement amid surging computational demand.
The Tau Scaling Law introduces a multi-layer optimisation framework spanning devices, circuits, chips and system-level architectures. Huawei expects high-end chips developed under the new framework to achieve transistor densities equivalent to a process node of 1.4 nanometre by 2031.
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Honestly, this seems to go beyond even system-on-a-chip (SoC). If you’re interested, there’s a deeper dive at Global Semi Research. But nobody quite seems to have a handle on it.
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Claude, author of the Humanitas • The Linchpin
“Linch”:
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I thought Pope Leo’s own speech was good, and addressed the current moment in AI with some of the seriousness it deserves. I thought the other speeches, including by Chris Olah, were less impressive. But that’s okay, I’m not the target audience!
A specific cardinal’s point struck me, however:
Cardinal Parolin made much of a specific prepositional choice in the subtitle: “sulla custodia della persona umana nel tempo dell’intelligenza artificiale,“ which the live translator translated to something like “on the safeguarding of the human person in the time of AI,” and not “sull’intelligenza artificiale“ – “on AI.”
This was supposed to be a big deal. “In the time of AI” supposedly centers the human person in the theological narrative, while a mere first papal encyclical on AI focuses too much on the technology itself and not on human and societal reactions. A fascinating position!
Though as my subsequent analysis will demonstrate, perhaps a more apt preposition here is “by.” As in, the world’s first papal encyclical written in large part by AI.
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This has been strenuously denied. My (limited) understanding is that encyclicals have contributions from multiple sources and is then drawn together in the Vatican. So is there a possibility that someone further down the chain of the 40,000-odd words asked Claude (or similar) to help? Possible, but it still feels very unlikely.
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You couldn’t create a more anti-news internet if you tried • Nieman Journalism Lab
Matt Pearce:
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When I go out and chat with people, I have no idea what kind of media they’re consuming, if any at all. Some people just ask AI: OpenAI reported in February that ChatGPT is getting about a million prompts a week for local news. Others randomly encounter news when TikTok passes a news creator at them. They have to describe the videos to me: I deleted the app and have lately been preferring to take my news via print as if I were a million years old and the past 15 years of media innovation I lived and worked through and helped foment never happened. Ironically, by weaning myself off a longtime digital news addiction (apart from a couple mostly national apps), I’m probably far closer to the modal consumer news experience than when I was a Los Angeles Times reporter, which is to say: news is not something a lot of people are actively seeking out. “News finds you nowadays,” a survey respondent told the Pew Research Center.
We are all part of the counterpublic now. And a counterpublic tends to distrust whoever’s in charge. There’s a counterpublic occupying the White House as we speak, and it’s notable for the time it spends looking for someone else to blame for what’s going on.
I work on things like news subsides to support the supply side of news production. But in environments of overwhelming choice (like ours for digital media), Richard Thaler and Cass Sunstein call for “libertarian paternalism” to help overwhelmed people make better consumer decisions. This repulsive term has the quality of being honest in that intentionally combines two unlikable words to describe a solution to the conundrum of how you guide flawed humans toward outcomes they might be happier with without depriving them of free choice.
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(Thanks Gregory B for the link.)
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| • Why do social networks drive us a little mad? • Why does angry content seem to dominate what we see? • How much of a role do algorithms play in affecting what we see and do online? • What can we do about it? • Did Facebook have any inkling of what was coming in Myanmar in 2016? Read Social Warming, my latest book, and find answers – and more. |
Errata, corrigenda and ai no corrida: none notified








