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Waymo's fleet of autonomous robotaxis can navigate city streets and compete with human taxi drivers, but they become stranded when a passenger leaves a door ajar -- prompting the company to pay tow truck operators around $20 to $24 through an app called Honk just to push a door shut. The owner of a towing company in Inglewood, California, completes up to three such jobs a week for Waymo, sometimes freeing vehicles by removing seat belts caught in doors. Another Los Angeles tow operator said locating stuck robotaxis can take 10 minutes to an hour because the precise location isn't always provided, forcing workers to search on foot through narrow streets too narrow for flatbed rigs. Tow operators also retrieve Waymos that run out of battery before reaching charging stations, earning $60 to $80 per tow -- rates that aren't always profitable after factoring in fuel and labor. During a San Francisco power outage last weekend, multiple operators received a flurry of retrieval requests as robotaxis blocked intersections across the city. One San Francisco tow company manager declined because Waymo's offered rate fell below his standard $250 flatbed fee. Waymo said in a blog post that the outage caused a "backlog" in requests to remote human workers who help vehicles navigate defunct traffic signals. San Francisco Supervisor Bilal Mahmood called for a hearing into Waymo's operations, saying the traffic disruptions were "dangerous and unacceptable." A retired Carnegie Mellon engineering professor who studied autonomous vehicles for nearly 30 years said paying humans to close doors and retrieve stalled cars is expensive and will need to be minimized as Waymo scales up. The company is testing next-generation Zeekr vehicles in San Francisco that feature automatic sliding doors.

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Nvidia has agreed to buy assets from Groq, a designer of high-performance artificial intelligence accelerator chips, for $20 billion in cash, according to Alex Davis, CEO of Disruptive, which led the startup's latest financing round in September. From a report: Davis, whose firm has invested more than half a billion dollars in Groq since the company was founded in 2016, said the deal came together quickly. Groq raised $750 million at a valuation of about $6.9 billion three months ago. Investors in the round included Blackrock and Neuberger Berman, as well as Samsung, Cisco, Altimeter and 1789 Capital, where Donald Trump Jr. is a partner. Groq said in a blog post on Wednesday that it's "entered into a non-exclusive licensing agreement with Nvidia for Groq's inference technology," without disclosing a price. With the deal, Groq founder and CEO Jonathan Ross along with Sunny Madra, the company's president, and other senior leaders "will join Nvidia to help advance and scale the licensed technology," the post said.

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Once again there is a brand-new release under the tree from the Ruby programming-language project: Ruby 4.0 has been released with many new features and improvements. Notable changes include the experimental Ruby Box feature for in-process isolation of classes and modules, a new just-in-time compiler called ZJIT, and improvements to Ruby's parallel-execution mechanism (Ractor). There are a number of language changes as well. See the documentation for Ruby 4.0 for more.

The Trump administration has announced it would replace the lottery programme used to grant H-1B visas for skilled foreign workers with a system that prioritises higher-paid individuals. From a report: The Department of Homeland Security said it would begin to implement a "weighted" selection process to give an advantage to higher-skilled and higher-paid applicants from February, according to a statement posted on its website. Matthew Tragesser, Citizenship and Immigration Services spokesperson, said: "The existing random selection process of H-1B registrations was exploited and abused by US employers who were primarily seeking to import foreign workers at lower wages than they would pay American workers." The move is the latest in a broad crackdown on US immigration by President Donald Trump, who has dramatically stepped up deportations of immigrants and sent enforcement agents into cities across the country to carry out arrests. The change also follows moves earlier this year to curb the number of applicants for the H-1B visa, which is popular among technology and professional services companies, including charging an additional $100,000 fee. Beryl Howell, a federal judge on the US District Court for the District of Columbia, late on Tuesday ruled the White House could move forward with the application charge after the US Chamber of Commerce had sued in October to block the six-figure fee.

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Security updates have been issued by Fedora (httpd, retroarch, and roundcubemail), Oracle (container-tools:rhel8, grafana, httpd, kernel, python3.12, python39:3.9, thunderbird, and uek-kernel), and SUSE (cheat, go-sendxmpp, and kernel).

An anonymous reader quotes a report from the Wall Street Journal: It's harder than ever to mine bitcoin. And less profitable, too. But mining-company stocks are still flying, even with cryptocurrency prices in retreat. That's because these firms have something in common with the hottest investment theme on the planet: the massive, electricity-hungry data centers expected to power the artificial-intelligence boom. Some companies are figuring out how to remake themselves as vital suppliers to Alphabet, Amazon, Meta, Microsoft and other "hyperscalers" bent on AI dominance. Bitcoin-mining -- using vast computer power to solve equations to unlock the digital currency -- has been a lucrative and cutting-edge pursuit in its own right. Lately, however, increased competition and other challenges have eroded profit margins. But just as the bitcoin-mining business began to cool, the AI build-out turned white hot. The AI arms race has created an insatiable demand for some assets the miners already have: data centers, cooling systems, land and hard-to-obtain contracts for electrical power -- all of which can be repurposed to train and power AI models. It's not a seamless process. Miners often have to build new, specialized facilities, because running AI requires more-advanced cooling and network systems, as well as replacing bitcoin-mining computers with AI-focused graphics processing units. But signing deals with miners allows AI giants to expand faster and cheaper than starting new facilities from scratch. These companies still mine some bitcoin, but the transition gives miners a new source of deep-pocketed customers willing to commit to longer-term leases for their data centers. "The opportunity for miners to convert to AI is one of the greatest opportunities I could possibly imagine," said Adam Sullivan, chief executive of Core Scientific, which has pivoted to AI data centers. The shift has boosted miners' stocks. The CoinShares Bitcoin Mining ETF has surged about 90% this year, a rally that has accelerated even as bitcoin erased its gains for 2025. The ETF holds shares of miners including Cipher Mining and IREN, both of which have surged following long-term deals with companies such as Amazon and Microsoft. Shares of Core Scientific quadrupled in 2024 after the company signed its first AI contract that February. The stock has gained 10% this year. The company now expects to exit bitcoin mining entirely by 2028.

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alternative_right shares a report from Euronews: France's President Emmanuel Macron discovered news of his own supposed overthrow, after he received a message of concern, along with a link to a Facebook video. "On Sunday (14 December) one of my African counterparts got in touch, writing 'Dear president, what's happening to you? I'm very worried,'" Macron told readers of French local newspaper La Provence on December 16. Alongside the message, a compelling video showcasing a swirling helicopter, military personnel, crowds and -- what appears to be -- a news anchor delivering a piece to camera. "Unofficial reports suggest that there has been a coup in France, led by a colonel whose identity has not been revealed, along with the possible fall of Emmanuel Macron. However, the authorities have not issued a clear statement," she says. Except, nothing about this video is authentic: it was created with AI. After discovering the video, Macron asked Pharos -- France's official portal for signaling online illicit content -- to call Facebook's parent company Meta, to get the fake video removed. But that request was turned down, as the platform claimed it did not violate its "rules of use." [...] The original video ... racked up more than 12 million views [...].The teenager running the account is based in Burkina Faso and makes money running courses focusing on how to monetize AI. He eventually took the video down more than a week after its initial publication, due to political -- and public -- controversy. "I tend to think that I have more power to apply pressure than other people," Macron said. "Or rather, that it's easier to say something is serious if I am the one calling, but it doesn't work." "These people are mocking us," he added. "They don't care about the serenity of public debates, they don't care about democracy, and therefore they are putting us in danger."

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With NASA's Mars Sample Return mission delayed into the 2030s, engineers are certifying the Perseverance rover to keep operating for many more years while it continues collecting and safeguarding Martian rock samples. Ars Technica reports: The good news is that the robot, about the size of a small SUV, is in excellent health, according to Steve Lee, Perseverance's deputy project manager at NASA's Jet Propulsion Laboratory (JPL). "Perseverance is approaching five years of exploration on Mars," Lee said in a press briefing Wednesday at the American Geophysical Union's annual fall meeting. "Perseverance is really in excellent shape. All the systems onboard are operational and performing very, very well. All the redundant systems onboard are available still, and the rover is capable of supporting this mission for many, many years to come." The rover's operators at JPL are counting on sustaining Perseverance's good health. The rover's six wheels have carried it a distance of about 25 miles, or 40 kilometers, since landing inside the 28-mile-wide (45-kilometer) Jezero Crater in February 2021. That is double the original certification for the rover's mobility system and farther than any vehicle has traveled on the surface of another world. Now, engineers are asking Perseverance to perform well beyond expectations. An evaluation of the rover's health concluded it can operate until at least 2031. The rover uses a radioactive plutonium power source, so it's not in danger of running out of electricity or fuel any time soon. The Curiosity rover, which uses a similar design, has surpassed 13 years of operations on Mars. There are two systems that are most likely to limit the rover's useful lifetime. One is the robotic arm, which is necessary to collect samples, and the other is the rover's six wheels and the drive train that powers them. "To make sure we can continue operations and continue driving for a long, long way, up to 100 kilometers (62 miles), we are doing some additional testing," Lee said. "We've successfully completed a rotary actuator life test that has now certified the rotary system to 100 kilometers for driving, and we have similar testing going on for the brakes. That is going well, and we should finish those early part of next year."

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An anonymous reader quotes a report from the Financial Post: A Texas power developer is proposing to repurpose nuclear reactors from Navy warships to power the United States grid as the Trump administration pushes to secure massive amounts of energy for the artificial intelligence boom. HGP Intelligent Energy LLC filed an application to the Energy Department to redirect two retired reactors to a data center project proposed at Oak Ridge, Tennessee, according to a letter submitted to the agency's Office of Energy Dominance Financing. The project, filed for the White House's Genesis Mission, would produce about 450-520 megawatts of around-the-clock electricity, or enough to power roughly 360,000 homes. The proposal would rewire reactors from naval vessels, originally built by Westinghouse Electric Company and General Electric, at a fraction of the cost of new builds. According to the report, The developer expects to seek a loan guarantee from the U.S. Department of Energy and raise roughly $1.8-$2.1 billion in private capital to prepare the reactors for civilian use, targeting initial completion by 2029. The approach is technically feasible but would break new ground by adapting military nuclear assets for the commercial grid. Bloomberg first reported the story.

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"In the age of Spotify and AI slop, tapes remind us what we're missing when we stop taking risks," writes author Janus Rose in an article for 404 Media. Here's an excerpt: There are lots of advantages to the cassette lifestyle. Unlike vinyl records, tapes are compact and super-portable, and unlike streaming, you never have to worry about a giant company suddenly taking them away from you. They can be easily duplicated, shared, and made into mixtapes using equipment you find in a junk shop. When I was a kid, the first music I ever owned were tapes I recorded from MTV with a Kids' Fisher Price tape recorder. I had no money, so I would listen to those tapes for hours, relishing every word Kim Gordon exhaled on my bootlegged copy of Sonic Youth's "Bull in the Heather." Just like back then, my rediscovery of cassettes has led me to start listening more intentionally and deeply, devoting more and more time to each record without the compulsion to hit "skip." Most of the cassettes I bought in Tokyo had music I probably never would have found or spent time with otherwise. Getting reacquainted with tapes made me realize how much has been lost in the streaming era. Over the past two decades, platforms like Spotify co-opted the model of peer-to-peer filesharing pioneered by Napster and BitTorrent into a fully captured ecosystem. But instead of sharing, this ecosystem was designed around screen addiction, surveillance, and instant gratification -- with corporate middlemen and big labels reaping all the profits. Streaming seeks to virtually eliminate what techies like to call "user friction," turning all creative works into a seamless and unlimited flow of data, pouring out of our devices like water from a digital faucet. Everything becomes "Content," flattened into aesthetic buckets and laser-targeted by "perfect fit" algorithms to feed our addictive impulses. Thus the act of listening to music is transformed from a practice of discovery and communication to a hyper-personalized mood board of machine-optimized "vibes." What we now call "AI Slop" is just a novel and more cynically efficient vessel for this same process. Slop removes human beings as both author and subject, reducing us to raw impulses -- a digital lubricant for maximizing viral throughput. Whether we love or hate AI Slop is irrelevant, because human consumers are not its intended beneficiaries. In the minds of CEOs like OpenAI's Sam Altman, we're simply components in a machine built to maintain and accelerate information flows, in order to create value for an insatiably wealthy investor class. [...] Tapes and other physical media aren't a magic miracle cure for late-stage capitalism. But they can help us slow down and remember what makes us human. Tapes make music-listening into an intentional practice that encourages us to spend time connecting with the art, instead of frantically vibe-surfing for something that suits our mood from moment-to-moment. They reject the idea that the point of discovering and listening to music is finding the optimal collection of stimuli to produce good brain chemicals. More importantly, physical media reminds us that nothing good is possible if we refuse to take risks. You might find the most mediocre indie band imaginable. Or you might discover something that changes you forever. Nothing will happen if you play it safe and outsource all of your experiences to a content machine designed to make rich people richer.

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Inside this week's LWN.net Weekly Edition:

• Front: 2025 retrospective; Dirk and Linus talk; successful open-source documentation projects; verifier-state pruning in BPF; Linux 32-bit timeline; BPF state visualizer; systemd v259.
• Briefs: linux-next maintainer; 2025 TAB; Git in Debian; Elementary OS 8.1; Qubes OS 4.3.0; GDB 17.1; Incus 6.20; systemd v259; Quotes; ...
• Announcements: Newsletters, conferences, security updates, patches, and more.

Apple will allow alternative iOS app stores and external payment systems in Brazil after settling an antitrust case with the country's competition authority, following a lawsuit brought by MercadoLibre back in 2022. Thurrott reports: Yesterday, Brazil's Conselho Administrativo de Defesa Economica (CADE) explained in its press release that it has approved a Term of Commitment to Cease (TCC) submitted by Apple. To settle the lawsuit, the iPhone maker has agreed to allow third-party iOS app stores in Brazil and to let developers use external payment systems. The company will also use neutral wording in the warning messages about third-party app stores and external payment systems that iOS users in Brazil will see. As part of the settlement, Apple has 105 days to implement these changes to avoid a fine of up to $27.1 million. A separate report from Brazilian blog Tecnoblog revealed that Apple will still take a 5% "Core Technology Commission" fee on transactions going through alternative app stores. Additionally, the company will take a 15% cut on in-app purchases for App Store apps when developers redirect users to their own payment systems.

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An anonymous reader quotes a report from Wired: Two years ago, Lizmary Fernandez took a detour from studying to be an immigration attorney to join a free Apple course for making iPhone apps. The Apple Developer Academy in Detroit launched as part of the company's $200 million response to the Black Lives Matter protests and aims to expand opportunities for people of color in the country's poorest big city. But Fernandez found the program's cost-of-living stipend lacking -- "A lot of us got on food stamps," she says -- and the coursework insufficient for landing a coding job. "I didn't have the experience or portfolio," says the 25-year-old, who is now a flight attendant and preparing to apply to law school. "Coding is not something I got back to." Since 2021, the academy has welcomed over 1,700 students, a racially diverse mix with varying levels of tech literacy and financial flexibility. About 600 students, including Fernandez, have completed its 10-month course of half-days at Michigan State University, which cosponsors the Apple-branded and Apple-focused program. WIRED reviewed contracts and budgets and spoke with officials and graduates for the first in-depth examination of the nearly $30 million invested in the academy over the past four years -- almost 30 percent of which came from Michigan taxpayers and the university's regular students. As tech giants begin pouring billions of dollars into AI-related job training courses across the country, the Apple academy offers lessons on the challenges of uplifting diverse communities. [...] The program gives out iPhones and MacBooks and spends an estimated $20,000 per student, nearly twice as much as state and local governments budget for community colleges. [...] About 70 percent of students graduate, which [Sarah Gretter, the academy leader for Michigan State] describes as higher than typical for adult education. She says the goal is for them to take "a next step," whether a job or more courses. Roughly a third of participants are under 25, and virtually all of them pursue further schooling. [...] About 71 percent of graduates from the last two years went onto full-time jobs across a variety of industries, according to academy officials. Amy J. Ko, a University of Washington computer scientist who researches computing education, calls under 80 percent typical for the coding schools she has studied but notes that one of her department's own undergraduate programs has a 95 percent job placement rate.

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Adult children across the United States are increasingly reporting that their aging parents have developed what looks remarkably like the smartphone addiction [non-paywalled source] typically associated with teenagers, a phenomenon The Atlantic's Charlie Warzel has dubbed "phone-based retirement." A 2019 Pew Research Center study found people 60 and older spend more than half their daily leisure time -- four hours and 16 minutes -- in front of screens. Nielsen reported this year that adults 65 and up watch YouTube on their TVs nearly twice as much as they did two years ago. 40% of adults aged 59 to 77 reported feeling anxious without device access in a 2,000-person survey. Ipsit Vahia, chief of geriatric psychiatry at Mass General Brigham's McLean Hospital, cautioned against treating all older adults as a monolithic group. The COVID-19 pandemic drove significant tech adoption among seniors as Zoom became essential for family gatherings, church services, and telehealth. Some research suggests device use may be linked to better cognitive function for people over 50, and Vahia noted that technology use in older adults appears to protect them from isolation and loneliness -- the opposite of its effect on teenagers.

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After Anna's Archive published a massive scrape containing 86 million songs and metadata from Spotify, the streaming giant responded by disabling the nefarious accounts responsible. A spokesperson for Spotify told Recorded Future News that it "has identified and disabled the nefarious user accounts that engaged in unlawful scraping." "We've implemented new safeguards for these types of anti-copyright attacks and are actively monitoring for suspicious behavior," the spokesperson said. "Since day one, we have stood with the artist community against piracy, and we are actively working with our industry partners to protect creators and defend their rights." The Record reports: The spokesperson added that Anna's Archive did not contact them before publishing the files. They also said it did not consider the incident a "hack" of Spotify. The people behind the leaked database systematically violated Spotify's terms by stream-ripping some of the music from the platform over a period of months, a spokesperson said. They did this through user accounts set up by a third party and not by accessing Spotify's business systems, they added. Anna's Archive published a blog post about the cache this weekend, writing that while it typically focuses its efforts on text, its mission to preserve humanity's knowledge and culture "doesn't distinguish among media types." "Sometimes an opportunity comes along outside of text. This is such a case. A while ago, we discovered a way to scrape Spotify at scale. We saw a role for us here to build a music archive primarily aimed at preservation," they said. "This Spotify scrape is our humble attempt to start such a 'preservation archive' for music. Of course Spotify doesn't have all the music in the world, but it's a great start."

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Microsoft has denied any plans to rewrite Windows 11 using AI and Rust after a LinkedIn post from one of its top-level engineers sparked a wave of online backlash by claiming the company's goal was to "eliminate every line of C and C++ from Microsoft by 2030." Galen Hunt, a principal software engineer responsible for several large-scale research projects at Microsoft, made the claim in what was originally a hiring post for his team. His original wording described a "North Star" of "1 engineer, 1 month, 1 million lines of code" and outlined a strategy to "combine AI and Algorithms to rewrite Microsoft's largest codebases." The repeated use of "our" in the post led many to interpret it as an official company direction rather than a personal research ambition. Frank X. Shaw, Microsoft's head of communications, told Windows Latest that the company has no such plans. Hunt subsequently edited his LinkedIn post to clarify that "Windows is NOT being rewritten in Rust with AI" and that his team's work is a research project focused on building technology to enable language-to-language migration. He characterized the reaction as "speculative reading between the lines."

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Italy's antitrust regulator Italian Competition Authority ordered Meta to suspend a policy that blocks rival AI chatbots from using WhatsApp's business APIs, citing potential abuse of market dominance. "Meta's conduct appears to constitute an abuse, since it may limit production, market access, or technical developments in the AI Chatbot services market, to the detriment of consumers," the Authority wrote. "Moreover, while the investigation is ongoing, Meta's conduct may cause serious and irreparable harm to competition in the affected market, undermining contestability." TechCrunch reports: The AGCM in November had broadened the scope of an existing investigation into Meta, after the company changed its business API policy in October to ban general-purpose chatbots from being offered on the chat app via the API. Meta has argued that its API isn't designed to be a platform for the distribution of chatbots and that people have more avenues beyond WhatsApp to use AI bots from other companies. The policy change, which goes into effect in January, would affect the availability of AI chatbots from the likes of OpenAI, Perplexity, and Poke on the app.

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Amazon finds itself caught between two competing impulses as AI shopping agents from OpenAI, Google, Perplexity and Microsoft mushroom across the e-commerce space -- block them to protect its dominant position, or partner with them to avoid being left behind. The company has largely played defense so far. Amazon recently updated its website code to block external AI agents from crawling it, and as of this week had blocked 47 bots including those from all major AI companies. In November, Amazon sued Perplexity over an agent in the startup's Comet browser that can make purchases on users' behalf, alleging the company concealed its agents to continue scraping Amazon's site. But Amazon's stance appears to be shifting, CNBC reports. CEO Andy Jassy said on an October earnings call that Amazon expects to partner with third-party agents and has engaged in conversations with some providers. The company is now hiring a corporate development leader to forge strategic partnerships in "agentic commerce." Amazon is also investing in its own tools. The company launched shopping chatbot Rufus last February and has been testing an agent called Buy For Me that can purchase products from other sites within Amazon's app.

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An anonymous reader quotes a report from the Wall Street Journal: Concerned that artificial intelligence could threaten Communist Party rule, Beijing is taking extraordinary steps to keep it under control. Although China's government sees AI as crucial to the country's economic and military future, regulations and recent purges of online content show it also fears AI could destabilize society. Chatbots pose a particular problem: Their ability to think for themselves could generate responses that spur people to question party rule. In November, Beijing formalized rules it has been working on with AI companies to ensure their chatbots are trained on data filtered for politically sensitive content, and that they can pass an ideological test before going public. All AI-generated texts, videos and images must be explicitly labeled and traceable, making it easier to track and punish anyone spreading undesirable content. Authorities recently said they removed 960,000 pieces of what they regarded as illegal or harmful AI-generated content during three months of an enforcement campaign. Authorities have officially classified AI as a major potential threat, adding it alongside earthquakes and epidemics to its National Emergency Response Plan. Chinese authorities don't want to regulate too much, people familiar with the government's thinking said. Doing so could extinguish innovation and condemn China to second-tier status in the global AI race behind the U.S., which is taking a more hands-off approach toward policing AI. But Beijing also can't afford to let AI run amok. Chinese leader Xi Jinping said earlier this year that AI brought "unprecedented risks," according to state media. A lieutenant called AI without safety like driving on a highway without brakes. There are signs that China is, for now, finding a way to thread the needle. Chinese models are scoring well in international rankings, both overall and in specific areas such as computer coding, even as they censor responses about the Tiananmen Square massacre, human-rights concerns and other sensitive topics. Major American AI models are for the most part unavailable in China. It could become harder for DeepSeek and other Chinese models to keep up with U.S. models as AI systems become more sophisticated. Researchers outside of China who have reviewed both Chinese and American models also say that China's regulatory approach has some benefits: Its chatbots are often safer by some metrics, with less violence and pornography, and are less likely to steer people toward self-harm. "The Communist Party's top priority has always been regulating political content, but there are people in the system who deeply care about the other social impacts of AI, especially on children," said Matt Sheehan, who studies Chinese AI at the Carnegie Endowment for International Peace, a think tank. "That may lead models to produce less dangerous content on certain dimensions."

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Los Angeles Times (non-paywalled source): When police questioned Marvin Margolis following the murder of Elizabeth Short -- who became known as the Black Dahlia -- he lied about how well he had known her. The 22-year-old Short had been found mutilated in a weedy lot in South Los Angeles, severed neatly in half with what detectives thought was surgical skill. Margolis was on the list of suspects. He was a sullen 21-year-old premed student at USC, a shell-shocked World War II veteran who had expressed an eagerness to practice surgery. He was "a resentful individual who shows ample evidence of open aggression," a military psychiatrist had concluded. At first, Margolis did not tell detectives that he had lived with Short for 12 days at a Hollywood Boulevard apartment, three months before her January 1947 murder. Margolis later admitted they had lived together in Apartment 726 at the Guardian Arms Apartments. But he soon moved to Chicago and changed his name, frustrating further attempts to question him. Among many suspects, a district attorney investigator would note, Margolis was "the only pre-medical student who ever lived as a boy friend with Beth Short." A generation later and hundreds of miles north, a killer who called himself the Zodiac terrorized the San Francisco Bay Area with five seemingly random murders from 1968 to 1969, taunting police and media for years with letters and cryptograms. The toughest to decipher was the letter he sent in April 1970 to the San Francisco Chronicle, with the words "My name is -" followed by a 13-character string of letters and symbols. It came to be called the Z13 cipher, and its brevity has stymied generations of PhDs and puzzle prodigies. Alex Baber, a 50-year-old West Virginia man who dropped out of high school and taught himself codebreaking, now says he has cracked the Zodiac killer's identity -- and in the process solved the Black Dahlia case as well. "It's irrefutable," said Baber, obsessive, hyperfocused and cocksure in manner, his memory encyclopedic and his speech a firehose of dates, locations and surprising linkages. [...] To attack the problem, Baber used artifical intelligence and generated a list of 71 million possible 13-letter names. Using known details of the Zodiac killer, based on witness descriptions, he cross-checked those names against military, marriage, census and other public records. "This takes me nine months of working 18-20 hour days," he said. "I'm starting to kill this onion. I'm starting to eliminate layers: Too tall, too short, or wrong race." The candidates narrowed to 185, to 14, and then, he said, to one. The name he found buried in the Z13 code: "Marvin Merrill."

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