
The precise biology behind the Venus Flytrap’s stunningly fast activation has been figured out, finally. CC-licensed photo by Mark Freeth on Flickr.
You can sign up to receive each day’s Start Up post by email. You’ll need to click a confirmation link, so no spam.
A selection of 11 links for you. Yes, they’re back. I’m @charlesarthur on Twitter. On Threads: charles_arthur. On Mastodon: https://newsie.social/@charlesarthur. On Bluesky: @charlesarthur.bsky.social. Observations and links welcome.
Social media ban for under-16s in the UK: Cambridge expert reaction • University of Cambridge
»
“Whether this is a good or bad policy decision depends on what we consider to be the ultimate goal of this ban,” said Prof Amy Orben of Cambridge’s MRC Cognition and Brain Sciences Unit, who was last month appointed to a Department for Science, Innovation and Technology (DSIT) advisory panel on children’s online wellbeing.
“On the one hand, this ban will not solve our collective concerns about the increasingly digital childhoods experienced in the UK today. We know from the Australian ban that current enforcements are incomplete, and the majority of young people are still online at similar rates.
“Evidence synthesis from my team and others shows that we should likely not expect substantial boosts to well-being or mental health in the short term, or large changes in behaviours or rates of parental conflict,” said Orben, who led a major report on the current evidence on impacts of social media on young people, commissioned by DSIT and published in January.
“However, a ban is likely to change public perceptions, and make social media use less acceptable in younger age groups. This is an important first step in public health education and behavioural change. It can also minimise instances of individual harms for young people who cease engaging with platforms, and over time it can, if done right, change our culture around social media use among certain age groups.
“First and foremost, the ban is a recognition by government that previous policies to make social media safe have not worked as planned. Banning something for those most vulnerable is a good step if it cannot be made safe. But we know why social media is at times unsafe for not just children but adults as well: this includes harmful content, conduct or communications, as well as design features that make it harder for us to disengage even when we want to. We have failed to adequately address these.”
«
Social media ban: responses to 10 common objections • Edrith
Edrith:
»
I would like laws to have an impact. I’m also someone who is normally fairly opposed to safetyism and the nanny state, and supportive of parental choice. At the same time I’m not a full-on libertarian: I think some products should be age-gated (tobacco, gambling), regulated even for adults (cars, guns) or outright banned (drink-driving, heroin).
To put my cards on the table, I believe smartphones in general, and social media in particular, have been a deeply harmful societal innovation, at the ‘hey, let’s put lead in petrol’ scale of innovation. Their affects appear to include contributing to declining mental health, collapsing attention spans, bullying and general unhappiness, as well as contributing to broader crises such as falls in literacy, loneliness, fertility collapse and political polarisation. In some cases this is due to direct harms caused by use; in others, it is because the addictive nature crowds out other, healthier activities such as outdoor play or in-person socialising with others. For some of these, we increasingly have causal as well as correlational evidence; for others, it is simply highly indicative, when one looks at the trend lines across very many different countries going south at the same time.
Smartphones have sufficient other positive uses such that we’re not realistically going to get rid of them – any more than we did cars, despite the deaths they cause. But the case for social media is much weaker: regulation is needed, and a social media ban for under 16s (and a properly enforced phone ban in school) is a good place to start.
«
The piece then looks at the arguments against, and responds. It’s pretty straightforward. Doing is better than not doing.
unique link to this extract
Australia has already banned social media for under 16s; here’s what the UK can learn from the experience • The Conversation
Lisa Given:
»
In March 2026, Australia’s eSafety Commission released its first detailed compliance report. It showed social media companies had taken “some steps” to restrict access to accounts. But the report also provided data from parents showing 70% of children retained active social media accounts.
The report highlighted four key compliance issues. It found that messaging to under-16s on some platforms encouraged children to attempt age assurance, even where they declared themselves to be underage. Some platforms enabled under-16s to repeatedly attempt the same age-assurance method to ultimately pass age checks. Pathways for reporting age-restricted accounts have generally not been accessible and effective, particularly for parents. Finally, some platforms appear not to have done enough to prevent under-16s having accounts.
The report explained Facebook, Instagram, Snapchat, TikTok and YouTube were being investigated for “potential non-compliance”. While the results of these investigations are not yet known, enforcement decisions are expected by midyear. In the meantime, parents continue to be frustrated with the ineffectiveness of the legislation.
A recent study provides further insights into the flaws and limitations of Australia’s social media restrictions. The study found 61% of under 16s reported “no or little change” in their social media use. Only 26% reported they had been “significantly affected” by the ban. However, of those who were restricted, 51% reported a significant drop in access to news coverage. These results raise significant concerns for young people’s future civic engagement.
«
It’s always interesting how social media is viewed by those who oppose the laws as absolutely essential to children’s development at all ages, even though humans developed pretty well without them for quite a few million years.
unique link to this extract
Scientists reveal surprising mechanism behind Venus flytrap’s rapid snap • The Guardian
Hannah Devlin:
»
The Venus flytrap is one of nature’s most impressive predators, luring insects with the intoxicating scent of nectar before capturing them with a snap of its jaw-like leaves.
Now, scientists have revealed the mechanism that allows the carnivorous plant to react with lightning speed, resolving a problem that stumped Charles Darwin and many researchers after him.
In an intricate series of experiments, scientists found that a hair-trigger detection causes the cells on the outer surface of the leaf to soften. This prompts the flytrap to flip into a closed position within a second of a bug landing on the leaf.
“When Darwin saw these plants move so fast, he was convinced that the plant had a muscle inside, but plants do not have muscles and they do not have nerves,” said Dr Yoël Forterre, a physicist at the French National Centre for Scientific Research (CNRS) and Aix-Marseille University and senior author of the research. “For more than a century there have been many hypotheses. It’s very surprising that plant cell walls can tune their mechanical properties so fast.”
A key challenge, Forterre said, was making physical measurements of such a finely tuned system that moves incredibly quickly. “As soon as you perturb it, it closes,” he said. “If you close it accidentally with a drop of water, it will close and then reopen the next day. If it catches an insect, it has to digest it and dissolve the skeleton, which will take several weeks.”
«
Sure, seems trivial, but in a couple of decades it’ll probably be the principle behind a new method of repairing blood vessels. Or shoe fastenings. Who knows.
unique link to this extract
Will Siri AI kill AI as a service? • The Dent
Andy Nicolaides:
»
Love them or hate them, you can’t deny that Apple, and their products, change the playing field very often. Apple, along with Google with their Photos all, are probably responsible for a lot of standalone photo back up services closing their doors. As soon as the two big OS providers started including photo backup with their devices, the idea of it being a standalone product seemingly died overnight. Photo backup is just a service now, something anyone expects to have with any device they use.
Since starting to use Siri AI I’ve stopped using Gemini and Claude (again outside of the coding elements) for just general queries and questions. I’ve even reduced my Kagi usage a little for general questions and information. There is absolutely the novelty of it all that will drive me to use it more, of course, but the integration with the wider OS and the fact that it can now (finally) answer questions with decent information and relatively quickly all without having to use a separate app (which you can still do if you want) has already been a bit of a game changer.
After just a few days it’s already feeling like just a ‘service’ and part of what I get with an iPhone now. If I didn’t have use for Claude Code (it feels like we all need to be at least dabbling with it for work these days) I wouldn’t think twice of just not using a different AI system again.
As I say, very early days, but I feel like this is already the turning point where the expensive AI tools like Claude Code, ChatGPT Codex and others become very expensive professional applications, only aimed at corporations that have the money to burn on it, and the big players start to back away from targeting consumer users, with Gemini for Android, and Siri AI for Apple devices, becomes the de facto standard.
«
Amateur saboteurs: the young men carrying out attacks for gangs, Russia and Iran • Reuters
Michael Holden and Sam Tobin:
»
Shortly after midnight on May 13, 2025, Ukrainian national Roman Lavrynovych messaged someone he knew as ‘EL Money’, a mystery figure who had instructed him to commit three arson attacks on property linked to British Prime Minister Keir Starmer.
“I hope I will have an opportunity to shake your hand soon … Be in touch,” he said in a text message. An hour later, counter-terrorism officers raided his London home and he was charged with committing arson with intent to endanger life.
With his conviction on Monday, the 22-year-old Lavrynovych joins a growing list of mainly young men, lured on social media and found guilty in Britain of carrying out serious criminal acts on behalf of shadowy online figures for money which, more often than not, they never even received.
“Clearly the tasking (instruction) was to intimidate and create fear for the prime minister and to attack the UK,” said Helen Flanagan, head of counter-terrorism policing in London, in an interview for British media. “There is no evidence to suggest they knew who they were targeting or why. It was a quick dash for cash really.”
Foreign states using unreliable and untrained individuals -many of them minors – to carry out such tasks was almost unheard of until recent years but a flurry of incidents in Britain and across Europe has brought the issue into focus.
The authorities say the aim is to sow unrest and division while allowing hostile governments to deny any involvement.Russia has used the proxy tactic extensively in Ukraine: since its full-scale invasion in 2022, roughly one in five of the more than 1,100 Ukrainians accused of committing arson, terrorism or sabotage have been minors, Ukraine’s security service has said.
British authorities say doing so in Britain became necessary after more than 600 Russian operatives, including over 400 spies, were expelled following the poisoning of Sergei Skripal and his daughter Yulia in Salisbury, southern England, in 2018.
…Lavrynovych said he had been working on a construction site and was first contacted by EL Money on a Telegram chat used by Ukrainians to find jobs. He told police he had felt threatened to comply with his orders and was worried about his grandmother, with whom he lived.
“I needed some more money,” he told London’s Old Bailey court. “I didn’t know where he contacted me from.”
«
Has AI already killed how-to nonfiction? Sales trends, my personal data, and what it might mean for the future • The Blog of Author Tim Ferriss
Tim Ferriss:
»
let’s state the obvious: millions of people have a vague sense that AI is changing things. And LLMs sure are convenient for getting answers quickly. My team and I use Claude and other tools daily.
But far fewer people have first-hand experience with the speed and intensity of disruption that’s happening. Not in a year, not in six months, but right now.
So let me show you, using my own books as the cadaver on the table, what a fatality looks like. First, some broader stats. For the first three months of 2026, Publishers Weekly reported that “adult nonfiction” was down 9% from Q1 2025. Who knows… maybe in line with historical fluctuations?
But looking more closely, Self-help had the steepest subcategory decline, with units down 26.3% year-over-year. Only two of 16 subcategories—crafts/hobbies/antiques/games and religion—grew at all (9.6% and 1.6%, respectively). The exceptions alone could make an interesting blog post for another time.
But, let’s be honest: one quarter doesn’t make a trend. So let’s zoom out and look at my full catalog over a few years. Below are the domestic print numbers (BookScan) for my five books—The 4-Hour Workweek, The 4-Hour Body, The 4-Hour Chef, Tools of Titans, and Tribe of Mentors—as a portfolio.
Keep in mind that all of these were #1 NYT and/or WSJ bestsellers, and The 4-Hour Workweek was one of the most highlighted books across all of Amazon in 2017, a full decade after publication. The sales have been surprisingly durable… and predictable. These books have long been an annuity that I could count on.
But alas! There’s trouble in paradise.
«
His self-help books are down 57% against 2025, which was itself down 46% on the previous year. So:
»
On some level, The 4-Hour Body is a lookup table. I have described a lot of my books as Choose Your Own Adventure-style menus: How do I lose fat? How do I fix my sleep? How do I quickly add 10 pounds of muscle? Similarly, The 4-Hour Workweek is a decision tree for designing your lifestyle and automating your income.
In 2019, the best interface to those answers was a book. In 2026, millions believe that the best interface is a free chatbot that has read my books.
«
(Thanks Joe S for the link.)
unique link to this extract
Nobody clicks your share buttons • Derek Hanson
Derek Hanson:
»
I don’t click share buttons. I never have.
When I find something worth sharing, I tap the share icon in Chrome on my phone. That’s it. On my desktop I click the little link icon in Arc’s browser bar, or I just double-click the address bar and hit command-C command-V. I’ve never once looked at a row of branded social icons at the bottom of a blog post and thought, “Oh good, there’s the Facebook button.”
I think most people are the same way. And I think the data backs that up.
This idea has been rattling around in my head for years. Back when I was deep in my PhD research at Iowa State, I came across Andy Crestodina from Orbit Media writing about things you should remove from your website. One of them was social icons in your header. Not even the share buttons; the plain follow-us icons. His argument was simple: those icons are exit signs. You spent all this effort getting someone to your site, and the most visually prominent element on the page is an invitation to leave.
But he didn’t stop there. In the same piece, he looked at social share buttons on service pages and product pages and found the same pattern. Share rates around 0.1% or lower. His advice was to cut them and uninstall the WordPress plugin that added them. Visual noise, no value.
That stuck with me. And when I started building block themes and thinking about what belongs in a post template, I kept coming back to it. Every WordPress theme I’ve worked with ships social share icons somewhere in the post layout. They sit at the top or the bottom, a little row of branded circles. Nobody questions them. They’re just there, like they’ve always been there.
But should they be?
«
Obviously not: someone thought they were a good idea years ago, and everyone copied them, and now they’re like Japanese knotweed.
unique link to this extract
AI document integrity: what your AI reads is probably different from what you read • PQ PDF
PQ PDF Tools:
»
The problem hides in plain sight. A PDF isn’t one document. The page a person reads and the text a machine extracts are not guaranteed to match — and your AI ingests the machine’s version. When they differ, the model learns, retrieves and answers from a version of the document no human ever saw.
• RAG poisoning: retrieval pipelines index extracted text. If extraction diverges from the rendered page, your assistant cites content that isn’t there — confidently.
• Corrupted training data: fine-tuning on parsed PDFs bakes in extraction errors, hidden layers and reading-order scrambles at scale — invisibly.
• Compliance & e-discovery: when the value stored differs from the value shown — on signed forms, contracts and filings — automated review reaches the wrong conclusion.
• Silent, not loud: none of this throws an error. It degrades answer quality and audit integrity quietly, until someone downstream is wrong and can’t say why.
Across the 16,971-PDF DOJ Epstein release, 18.6% of files read differently to a machine than to a human — the extracted text layer diverged from the rendered page.
«
Given the prevalence of PDFs in all sorts of government and formal financial products, this is quite a hidden problem. Not an iceberg, but still trouble.
unique link to this extract
Current Rothko
Neat: a webpage that finds a Rothko painting that matches (as far as it can) the weather where you are. Needs location access, but it’s a web page, not an app.
unique link to this extract
Global food crisis looms as supply chains fracture after Iran War • news.com.au
Jamie Siedel:
»
Higher food prices? Less choice? Poorer quality? Disgruntled fellow shoppers? You ain’t seen nothing yet.
The muttering echoing through Australian supermarket aisles is just the beginning – even if US President Donald Trump miraculously pulls off his long-promised “deal” to end his Iran War.
Critical links in the global supply chain are broken. And they’re steadily winding their way towards the next harvest. The doubling (and in some places tripling) of diesel costs makes farming far more expensive. Not to mention transporting produce to market.
And a lack of fertiliser means the next crop will produce less. Or not be planted at all. Now, last season’s harvest is feeling the strain. “So today, we have enough food available, and we have enough stocks. The problem is for the next harvest,” warns UN Food and Agriculture Organisation chief economist Maximo Torero.
It’s a global problem. It extends from the fields of Africa to the prairies of the United States. “If the situation improves tomorrow, if you open the Strait of Hormuz tomorrow, we will still have higher prices because of less supply,” Torero explains.
“Farmers [have] already made a decision. But we could avoid a significant crisis by the end of the year or 2027.”
And if we don’t open the Strait of Hormuz tomorrow? “That means that the yields in the world will be affected for the second half of the year for 2027,” Torero said.
A new report published by the Food and Agriculture Organisation of the United Nations (FAO) states that the real Hormuz crisis will arrive in about six months.
“The decisions we make now will determine whether this remains a manageable shock, or evolves into a deeper global food security crisis in 2026 and 2027, and beyond,” Director General QU Dongyu told a crisis meeting in Spain on Wednesday.
He said the US/Israel attack on Iran had produced a moment of “profound geopolitical and economic fragility”.
«
Well in theory the strait is open, but..
unique link to this extract
| • 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







