If you’ve never heard of the threadless ball screw, which was invented over sixty years ago, [Angus] of Maker’s Muse has a video demonstrating the whole thing, covering its history and showcasing both its strengths and weaknesses. If you like seeing mechanical assemblies in action, give it a watch.
The device — consisting of little more than a smooth rod and three angled ball bearings — is a way to turn rotational motion into linear motion. Not a single belt, thread, or complex mechanical assembly in sight. While a simple nut on a threaded rod can turn rotation into linear motion, those come with their own issues. The threadless ball screw was one effort at finding a better way.
While it lacks precision, the threadless ball screw nevertheless offers quiet and smooth motion with adjustable tension in a very DIY-friendly design.
Threadless ball screws never really took off, although they were given some consideration for use in 3D printers back in the RepRap days. Today one can purchase quality CNC components without leaving one’s web browser, but back in the early 2000s things like lead screws and ball screws were rather more specialized, less accessible, and more expensive than they are today. RepRap folks had to make their own solutions. But while the threadless ball screw is a very DIY-friendly design, it was ultimately lacking in performance.
The main problem is they’re just not precise enough for anything like CNC work. [Angus] does some back-and-forth tests with a 3D printed unit that shows serious drift after only a few minutes. Now, he knows perfectly well that his 3D-printed test unit is far from ideal, but the rapidity at which it drifted was still a surprise. Making a carriage with two threadless ball screws — one at each end — performed a lot better, but was ultimately still flawed.
It’s not all bad. There’s zero backlash. They are mechanically simple, remarkably smooth, and utterly quiet. Also, [Angus] discovered that the maximum force this setup can be made to apply is surprisingly significant, and is directly related to the tension on the bearings. That means one can trivially adjust how easily the carriage slips (or doesn’t) just by tightening or loosening the screw holding each bearing.
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Sure, they’re not precise. But maybe you don’t need precision. Maybe you just need to move something back and forth in a strong & silent sort of way that can still slip gracefully (and quietly) if something goes awry, like bottoming out an axis. 3D printing makes it pretty easy to whip one up, so maybe there’s still a place for the threadless ball screw.
The London Marathon 2026 live streams will feature a stellar lineup of the world’s elite long-distance runners tackling the iconic 26.2-mile course, which winds from Greenwich to The Mall, via the famous dry dock, the Cutty Sark, in the UK capital. Alongside defending champions Sebastian Sawe and Tigst Assefa, more than 59,000 runners will pound the tarmac, including former F1 world champion Sebastian Vettel and Olympian Laura Kenny.
The 29-year-old Sawe claimed victory in 2:02:27 twelve months ago, finishing ahead of Jacob Kiplimo, the half-marathon world record holder, on his marathon debut. The Ugandan will once again expect to contend for a podium place. Ethiopia’s Deresa Geleta is the third runner to have gone under the 2:03 mark, while Joshua Cheptegei and Tamirat Tola, the reigning Olympic champions over 10,000m and the marathon respectively, are also in contention. Amos Kipruto, the 2022 London Marathon champion, is also set to line up.
Assefa didn’t just win the 2025 women’s race. She broke the women-only world record with a time of 2:15:50. The Olympic and world silver medallist is a supremely consistent performer but will face strong competition from Kenya’s Joyciline Jepkosgei, who won in 2021 and finished runner-up last year. Hellen Obiri, an Olympic bronze medallist in Paris, is also expected to challenge.
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In the wheelchair events, Marcel Hug is targeting a record-equalling eighth London title after winning last weekend’s Boston Marathon in the men’s race. Fellow Swiss athlete Catherine Debrunner is aiming for a third consecutive title in the UK capital.
There will be no shortage of famous faces among the nearly 60,000 runners either. Former F1 star Vettel, Olympic cyclist Laura Kenny, ex-England cricket captain Alastair Cook, and former champion jockey AP McCoy are all set to take part.
Read on for our guide on where to watch the London Marathon 2026 live streams online, on TV, and potentially for free wherever you are.
Can I watch London Marathon 2026 for free?
The 2026 London Marathon is free-to-air on BBC One and BBC iPlayer for UK residents. Remember, though, you must have a TV license.
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There are also free live streams from RaiPlay if you live in Italy andRTVE Playfor Spanish residents.
In countries where the race hasn’t been picked up by a local broadcasting partner, such as Japan or New Zealand, the Olympic Channel also has coverage without a cost.
This handy guide has a rundown of what broadcasting deals are in place worldwide, meaning you can work out if yours doesn’t via a process of elimination.
Traveling abroad right now? You can use a VPN to watch London Marathon 2026 for free as if you were right at home. NordVPN is our top pick of the options.
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How to watch London Marathon 2026 using a VPN
A VPN is handy piece of software that can make your device appear as if it’s back in your home country, so you can unlock your usual service. The best VPN right now? We recommend NordVPN – it does everything and comes with up to 75% off.
How to watch London Marathon 2026 live streams in the US
FloTrack is showing London Marathon 2026 in the US.
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A subscription will set you back $150 per year or $29.99 per month on a rolling basis.
If you’re traveling overseas, don’t worry, as you can use NordVPN to watch your usual service from abroad.
How to watch London Marathon 2026 live streams in the UK
(Image credit: Future)
The London Marathon 2026 is being shown on BBC One, BBC Two and BBC iPlayer in the UK.
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On Sunday, the elite race coverage starts at 8.30am on BBC One, before live coverage moves to BBC Two at 2pm.
You can watch throughout on BBC iPlayer and the BBC Sport website. Remember, you need a TV license to do so.
If you’re traveling overseas, don’t worry, as you can use NordVPN to watch your usual service from abroad.
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How to watch London Marathon 2026 live streams in Canada
(Image credit: Other)
In Canada, FloTrack is also showing the London Marathon 2026.
A subscription will set you back US$150 per year or US$29.99 per month. It’s billed in US dollars.
If you’re already a subscriber but you’re outside Canada right now, download a VPN to watch London Marathon 2026 as if you were back at home.
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How to watch London Marathon 2026 live streams in Australia
FloTrack is also showing London Marathon 2026 live streams in Australia.
A subscription will set you back US$150 per year or US$29.99 per month. It’s billed in US dollars.
Not in Australia? Use NordVPN to tap into your usual race coverage from anywhere if you’re away from home.
What is the London Marathon 2026 start time?
Sunday, April 26 8.50am – Elite Wheelchairs
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9.05am – Elite Women
9.35am – Elite Men
9.35am to 11.30am – Mass Participation Start
(All times BST)
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Can I watch London Marathon 2026 on my mobile?
Of course, most broadcasters have streaming services that you can access through mobile apps or via your phone’s browser.
You can also stay up-to-date with the London Marathon on the official social media channels on Instagram (@LondonMarathon) and Facebook (@LondonMarathon).
We test and review VPN services in the context of legal recreational uses. For example: 1. Accessing a service from another country (subject to the terms and conditions of that service). 2. Protecting your online security and strengthening your online privacy when abroad. We do not support or condone the illegal or malicious use of VPN services. Consuming pirated content that is paid-for is neither endorsed nor approved by Future Publishing.
Looking for the most recent Mini Crossword answer? Click here for today’s Mini Crossword hints, as well as our daily answers and hints for The New York Times Wordle, Strands, Connections and Connections: Sports Edition puzzles.
Need some help with today’s Mini Crossword? Read on for all the answers. And if you could use some hints and guidance for daily solving, check out our Mini Crossword tips.
If you’re looking for today’s Wordle, Connections, Connections: Sports Edition and Strands answers, you can visit CNET’s NYT puzzle hints page.
Looking for the most recent regular Connections answers? Click here for today’s Connections hints, as well as our daily answers and hints for The New York Times Mini Crossword, Wordle and Strands puzzles.
Today’s Connections: Sports Edition is a tough one. If you’re struggling with today’s puzzle but still want to solve it, read on for hints and the answers.
Connections: Sports Edition is published by The Athletic, the subscription-based sports journalism site owned by The Times. It doesn’t appear in the NYT Games app, but it does in The Athletic’s own app. Or you can play it for free online.
Hints for today’s Connections: Sports Edition groups
Here are four hints for the groupings in today’s Connections: Sports Edition puzzle, ranked from the easiest yellow group to the tough (and sometimes bizarre) purple group.
Yellow group hint: Whack!
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Green group hint: Hoops team monikers.
Blue group hint: Common last name.
Purple group hint: Not 2 or 3.
Answers for today’s Connections: Sports Edition groups
Climate tech startups are capital intensive, timelines are long, and the technology is often considered “first of its kind.” What’s more, a key value proposition is addressing pollution — an externality that is, at best, poorly priced by the market. Those aren’t the qualities stock pickers tend to favor.
And yet, public markets appear to be warming to climate tech startups — or at least some of them.
This week, nuclear startup X-energy went public, raising $1 billion in an upsized share offering that appears to have delivered a windfall for its investors, including Amazon. Retail investors apparently can’t get enough, with the stock popping 25% in its first hour of trading. Also this week, geothermal startup Fervo said it filed for an initial public offering. The size of the Fervo IPO has yet to be disclosed, but private investors have valued the company at around $3 billion, according to PitchBook.
The move to go public aligns with what investors told TechCrunch at the end of last year. After years of tepid attitudes toward climate tech companies, they expected public markets to start welcoming energy-related startups. Nearly every investor that weighed in on the question said the startups with the best chances of going public specialize in either nuclear fission or enhanced geothermal. Fervo, specifically, was mentioned several times.
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Thank data centers for that. The AI craze has taken a trend of rising demand for electricity and made it sexy and salable. Companies that were already betting on the upswing lucked into a trending narrative that coincided with their technological maturity. Fortune certainly favors the prepared.
The IPOs are also certain to please investors, letting them return capital to their LPs. The recent dearth of IPOs has kept a chunk of climate tech funding locked up, at a time when many funds would like to start cashing out.
But it’s not just about cashing out.
Techcrunch event
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San Francisco, CA | October 13-15, 2026
Fervo and X-energy have followed the traditional route to public markets, suggesting there is confidence that a broad base of investors wants to participate. If it were just about freeing up investor capital, the startups could have followed the SPAC route. (Severalhave.) But these two companies took the longer path.
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Yet for all that success, a wide swathe of climate tech will probably be left out of the IPO wave.
Companies that aren’t entangled in energy markets will have to find other ways to press on — and without access to the deep pockets the public market provides. The divergence suggests the climate tech world is starting to go K-shaped, a trend which Mark Cupta, managing director at Prelude Ventures, suggested when I spoke to him a little over a week ago.
Companies stuck on the poorer side of the IPO window still have private investors to lean on. But there, too, a K-shaped trajectory is starting to appear.
Venture capital and growth funds raised about $6.5 billion last year, according to Sightline Climate. That’s the same as in 2021, but because there are more funds today, each fund is now smaller. For founders, that could be bad news since funds have less to draw on. On the upside, more competition could drive better fundraising results.
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At the same time, the big funds keep getting bigger. Infrastructure dominated climate tech fundraising last year, with 42 funds raising 75% of all dollars in the sector, according to Sightline Climate. That success will spill over into the startup side if it’s a company with a mature technology that is ready to build big.
Sightline said that many new infrastructure funds are specializing in renewables, grid technologies, and energy storage. In other words, the K-shape isn’t going away anytime soon.
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In a letter to the residents of Tumbler Ridge, Canada, OpenAI CEO Sam Altman said he is “deeply sorry” that his company failed to alert law enforcement about the suspect in a recent mass shooting.
After police identified 18-year-old Jesse Van Rootselaar as a suspected shooter who allegedly killed eight people, the Wall Street Journal reported that OpenAI had flagged and banned Van Rootselaar’s ChatGPT account in June 2025 for after she described scenarios involving gun violence. The company’s staff debated alerting police but ultimately decided against it, eventually reaching out to Canadian authorities after the shooting.
OpenAI has since said that it is improving safety protocols, for example by putting more flexible criteria in place to determine when accounts get referred to authorities, and by establishing direct points of contact with Canadian law enforcement.
In Altman’s letter, which was first published in the local newspaper Tumbler RidgeLines, the CEO said he’d discussed the shooting with Tumbler Ridge Mayor Darryl Krakowka and British Columbia Premier David Eby, and they’d all agreed “a public apology was necessary,” but “time was also needed to respect the community as you grieved.”
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“I am deeply sorry that we did not alert law enforcement to the account that was banned in June,” Altman said. “While I know words can never be enough, I believe an apology is necessary to recognize the harm and irreversible loss your community has suffered.”
Altman also said that OpenAI’s focus will “continue to be on working with all levels of government to help ensure nothing happens like this again.”
In a post on X, Eby said Altman’s apology is “necessary, and yet grossly insufficient for the devastation done to the families of Tumbler Ridge.”
Is truth determined by the size of the audience it reaches?
If so, Michael—a new film about the pop singer Michael Jackson that is on track to have the biggest-ever opening for a music biopic, with projected earnings of $70 million at the US box office, despite critics saying it sanitizes the reality of who Jackson actually was—intends to supplant the King of Pop as the apotheosis of artistic virtue.
The film’s release has sparked a civil war online, between those eager to reclaim the music and myth of Jackson, and those who see any celebration of him as a failure of accountability.
Musically, Jackson was in a class all his own. In the pre-social media days, before AI artists charted on Billboard and he became a recurring meme online, Jackson was the epitome of monoculture: 13 number one singles, countless awards, twice inducted into the Rock & Roll Hall of Fame. He remains, even in death, one of the best-selling music artists of all time. But his legacy was also defined by multiple allegations of sexual abuse, an occasionally eccentric personal life, and Jackson’s on-record admission of sharing his bed with underage boys. “This guy was worse than Jeffrey Epstein,” Dan Reed, the director of Leaving Neverland, the 2019 Emmy-winning HBO documentary about Jackson’s alleged sexual misconduct, recently told the Hollywood Reporter.
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Director Antoine Fuqua, who maintains Jackson’s innocence, never intended to fully avoid the allegations that circled Jackson later in life. According to him, the original cut of Michael included a reenactment of the 1993 police raid on Neverland Ranch, where Jackson was strip-searched to verify the physical description of his first accuser, Jordan Chandler. But the scene was ultimately scrapped along with the film’s entire third act—totaling $15 million in reshoots—because of a legal clause in a settlement with Chandler that prohibited the depiction of his experience on screen.
The result is a film that stops abruptly in 1988 and erases the most controversial two decades of Jackson’s life. Instead, the film emphasizes Jackson’s musical legacy—the story arc is structured around career-defining music moments, like the making of the “Thriller” video—over the more contentious aspects of his personal behavior.
Scrubbing the Neverland Ranch scene, but also choosing to completely write around any of Jackson’s alleged misconduct, is not surprising given that the Jackson estate had approval over the use of his music, essentially granting it veto power over the film’s final cut. One argument that keeps surfacing on social media is that critics should judge Michael on its own terms rather than on what they think it should have been. “It seems like people wanted a movie [that] was never going to exist,” noted one X user. “So it was never going to be salacious or introspective”
Jackson’s fans argue the allegations shouldn’t eclipse his musical and artistic legacy, separating the artist from the work, while critics insist that a biopic should present a complete picture of Jackson, regardless of how unflattering that picture may be. As film critic Sean Burns characterized it on X, ending “with the release of Bad is like ending an OJ biopic with him winning the Heisman.” A good Michael Jackson movie, wrote the artist Harmony Holiday, “would be part tragedy, part farce,” calling attention to how the film lacks the real kind of interiority that made Jackson so polarizing.
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“Watching it feels more like being frog-marched through a wax museum than watching a movie, each milestone restaged with an off-putting, uncanny-valley resemblance and no interiority,” critic Alison Willmore noted in Vulture.
A 31-year-old engineer and computer scientist was identified in media reports and President Donald Trump as the suspected shooter at the White House Correspondents Dinner on Saturday night.
Cole Tomas Allen, of Torrance, California, was apprehended following the firing of shots at the Washington Hilton, where Trump was scheduled to deliver remarks to a ballroom full of journalists, cabinet officials, and Hilton staff. Allen’s name surfaced in media reports shortly before Trump posted two photos of a suspect following his apprehension. The person in the photos Trump posted matches photos of Allen.
In dramatic scenes, several shots were heard outside the ballroom, after which Trump and Vice President JD Vance were immediately rushed off the stage by the United States Secret Service. In the immediate aftermath of the shooting incident, it briefly appeared as if the event would proceed—Trump posted “LET THE SHOW GO ON” on Truth Social—but the event was eventually shut down.
According to the Metropolitan Police Department, the suspect “charged” a Secret Service checkpoint at the Hilton hotel, and was intercepted by agents. MPD interim chief Jeffery Carroll said the suspect was carrying a “shotgun, handgun, and multiple knives.”
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At a White House press conference following the shooting, Trump said one United States Secret Service agent was shot but saved from serious injury by his bulletproof vest. Trump said the agent, who was not named, is “doing great” and in “great shape.” No other injuries were immediately reported.
The suspect was later transported to a local hospital “to be evaluated,” according to Carroll, who said he appears to be a “lone actor.”
Around the time Trump’s press conference began on Saturday night, he posted a picture on his Truth Social account appearing to show the suspected shooter on the ground, with his hands restrained behind his back, and a foil warming blanket covering the lower half of his body.
A WIRED review of public databases shows a seemingly minimal online presence associated with Allen’s name. According to his LinkedIn profile, he graduated from Caltech in 2017 with a bachelor’s in mechanical engineering from California State University Dominguez Hills in 2025 with a master’s in computer science. A photo that appears to be of Allen appears on the Caltech site identifying him as a member of the school’s Mechanical Engineering 72 class, described by the school as a “two-term engineering design lab” for building robots and autonomous vehicles. His name is also listed in a 2025 Dominguez Hills graduation program. A search in a public facial recognition database returns only two images, both apparently of him as an undergraduate.
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According to the shooter’s LinkedIn profile, he has been employed part-time since March 2020 at C2 Education, a private company that helps students prepare for the SAT and ACT exams. In December 2024, C2 Education said in posts on LinkedIn and Facebook that he was the company’s “December Teacher of the Month.”
Since 2018, the suspected shooter self-identified on his LinkedIn profile as a “self-employed” indie game developer. He appears to have released an “atomic fighting game” called Bohrdom on Steam in 2018. He advertised the game using accounts on YouTube and X that appeared to have little to no following. The caption for a trailer of the game describes it as a “non-violent, skill-based, asymmetrical fighting game loosely based on a chemistry model that is itself loosely based on reality.”
Relatives of Allen’s did not immediately respond to requests for comment. C2 Education and the Metropolitan Police Department also did not immediately respond to requests for comment.
Sharma described the decision-making process as an equation, noting that memory costs influence multiple variables. She said Microsoft’s focus is on building a console capable of running great games – including PC titles – while accounting for market conditions that remain in flux. Read Entire Article Source link
In a recent experiment, Anthropic created a classified marketplace where AI agents represented both buyers and sellers, striking real deals for real goods and real money.
The company admitted this test — which it called Project Deal — was only “a pilot experiment with a self-selected participant pool” of 69 Anthropic employees who were given a budget of $100 (paid out via gift cards) to buy stuff from their coworkers.
Nonetheless, Anthropic said it was “struck by how well Project Deal worked,” with 186 deals made, totaling more than $4,000 in value.
The company said it actually ran four separate marketplaces with different models — one that was “real” (where everyone was represented by the company’s most-advanced model, and with deals actually honored after the experiment) and another three for study.
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Apparently, when users are represented by more advanced models, they get “objectively better outcomes,” Anthropic said. But users didn’t seem to notice the disparity, raising the possibility of “‘agent quality’ gaps” where “people on the losing end might not realize they’re worse off.”
Also, the initial instructions given to the agents didn’t appear to affect sale likelihood or the negotiated prices.
Microsoft is rolling out a major overhaul of its Windows Insider Program, aiming to simplify how early Windows features are tested while addressing long-standing user complaints around complexity and control. The update marks one of the biggest structural changes to the program in years, signaling a shift in how Microsoft wants to collaborate with its testing community.
A Simpler Insider Program Built Around Feedback And Control
The revamped program introduces a streamlined structure, reducing multiple Insider channels into two primary ones: Beta and Experimental. This replaces the earlier, more fragmented system that included Dev, Canary, and Release Preview channels, which often confused users about where they belonged.
Microsoft is also making it easier for users to move between channels or exit the program without needing a full system reset, thanks to in-place upgrade options.
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Alongside structural changes, the company is rolling out new preview builds and features that focus heavily on usability. Early updates include improvements to Windows Update, such as the ability to pause updates, avoid forced restarts, and gain more control over when updates are installed.
This shift reflects direct feedback from users who have long complained about disruptive updates and lack of control.
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Why This Overhaul Matters For Windows As A Platform
The Windows Insider Program is more than just a testing environment. It plays a critical role in shaping the future of Windows by allowing millions of users to test features before they reach the general public.
By simplifying the program, Microsoft is attempting to make feedback more meaningful and participation more accessible. The previous multi-channel system often led to fragmentation, with users unsure about stability levels or feature timelines.
The new approach suggests Microsoft is prioritizing clarity and efficiency over experimentation chaos. It also indicates a broader shift toward improving Windows 11’s overall quality, rather than rushing out features without sufficient refinement.
Why This Should Matter To You As A User
Even if you’re not a Windows Insider, these changes will likely affect your everyday experience. The Insider Program acts as a testing ground for features that eventually roll out to all users. Improvements in update control, system stability, and feature clarity will directly influence future Windows releases.
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Microsoft
For enthusiasts and developers, the changes make it easier to participate in testing without dealing with confusing channel choices or risky upgrades. For regular users, it means the features you eventually receive are more likely to be polished and less disruptive.
In simple terms, a better Insider Program leads to a better Windows experience overall.
What Comes Next For Microsoft’s Insider Strategy
The rollout of the revamped program is happening in phases, with users gradually being moved into the new channel structure. Microsoft is expected to continue refining the experience, focusing on transparency, clearer communication, and stronger integration of user feedback into development decisions. There are also indications that future updates will place greater emphasis on performance, reliability, and user control rather than just adding new features.
This overhaul doesn’t introduce a new version of Windows, but it may be just as important. It reflects a recognition from Microsoft that building a better operating system starts with listening more effectively to the people who use it.
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