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Evidence is mounting for "a vast reservoir of liquid water" on Mars, according to a new article by Australian National University professor Hrvoje TkalÄiÄ and geophysics associate professor Weijia Sun from the Chinese Academy of Geological Sciences, announcing their recently published paper. "Using seismic data from NASA's InSight mission, we uncovered evidence that the seismic waves slow down in a layer between 5.4 and 8 kilometres below the surface, which could be because of the presence of liquid water at these depths." Mars is covered in traces of ancient bodies of water. But the puzzle of exactly where it all went when the planet turned cold and dry has long intrigued scientists... Billions of years ago, during the Noachian and Hesperian periods (4.1 billion to 3 billion years ago), rivers carved valleys and lakes shimmered. As Mars' magnetic field faded and its atmosphere thinned, most surface water vanished. Some escaped to space, some froze in polar caps, and some was trapped in minerals, where it remains today. But evaporation, freezing and rocks can't quite account for all the water that must have covered Mars in the distant past. Calculations suggest the "missing" water is enough to cover the planet in an ocean at least 700 metres deep, and perhaps up to 900 metres deep. One hypothesis has been that the missing water seeped into the crust. Mars was heavily bombarded by meteorites during the Noachian period, which may have formed fractures that channelled water underground. Deep beneath the surface, warmer temperatures would keep the water in a liquid state — unlike the frozen layers nearer the surface. In 2018, NASA's InSight lander touched down on Mars to listen to the planet's interior with a super-sensitive seismometer. By studying a particular kind of vibration called "shear waves", we found a significant underground anomaly: a layer between 5.4 and 8 kilometres down where these vibrations move more slowly. This "low-velocity layer" is most likely highly porous rock filled with liquid water, like a saturated sponge. Something like Earth's aquifers, where groundwater seeps into rock pores. We calculated the "aquifer layer" on Mars could hold enough water to cover the planet in a global ocean 520-780m deep. InSight's seismometer captured vibrations between the crust of Mars and its lower layers from two meteorite impacts in 2021 and a Marsquake in 2022. "These signatures let us pinpoint boundaries where rock changes, revealing the water-soaked layer 5.4 to 8 kilometres deep." It's an exciting possibility. "Purified, it could provide drinking water, oxygen, or fuel for rockets." And since microbes thrives on earth in deep rocks filled with water, "Could similar life, perhaps relics of ancient Martian ecosystems, persist in these reservoirs?" |
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After gaining attention from Neowin and DistroWatch last week, the sole maintainer behind AnduinOS 1.3 -- a Linux distribution styled to resemble Windows 11 -- decided to reveal himself. He turns out to be Anduin Xue, a Microsoft software engineer, who has been working on the project as a personal, non-commercial endeavor built on Ubuntu. Neowin reports: As a Software Engineer 2 at Microsoft (he doesn't work on Windows), Anduin Xue says he's financially stable and sees no need to commercialize AnduinOS. Explaining the financial aspects of the project, he said: "Many have asked why I don't accept donations, how I profit, and if I plan to commercialize AnduinOS. Truthfully, I haven't thoroughly considered these issues. It's not my main job, and I don't plan to rely on it for a living. Each month, I dedicate only a few hours to maintaining it. Perhaps in the future, I might consider providing enterprise solutions based on AnduinOS, but I won't compromise its original simplicity. It has always been about providing myself with a comfortably themed Ubuntu."
In our coverage of the AnduinOS 1.3 release last week, one commenter pointed out that the distro is from China. For some, this will raise issues, but Anduin Xue addressed this in his blog post, too, saying that the source code is available to the public. For this reason, he told lacing the operating system with backdoors for the Chinese government would be "irrational and easily exposed." For those worried that the distribution may be abandoned, Anduin Xue said that he intends to continue supporting it and may even maintain it full-time if sponsorship or corporate cooperation emerges. |
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The Open Document Format reached its 20th anniversary on May 1, marking two decades since OASIS approved the XML-based standard originally developed by Sun Microsystems from StarOffice code. Even as the format has seen adoption by several governments including the UK, India, and Brazil, plus organizations like NATO, Microsoft Office's proprietary formats remain the de facto standard. Microsoft countered ODF by developing Office Open XML, eventually getting it standardized through Ecma International. "ODF is much more than a technical specification: it is a symbol of freedom of choice, support for interoperability and protection of users from the commercial strategies of Big Tech," said Eliane Domingos, Chair of the Document Foundation, which oversees LibreOffice -- a fork created after Oracle acquired Sun. |
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Longtime Slashdot reader RoccamOccam shares a blog post from the Trifecta Tech Foundation, a nonprofit organization that creates secure, open source building blocks for infrastructure software. The foundation is also the developer behind Sudo-rs. From the report: Ubuntu 25.10 is set to adopt sudo-rs by default. Sudo-rs is a memory-safe reimplementation of the widely-used sudo utility, written in the Rust programming language. This move is part of a broader effort by Canonical to improve the resilience and maintainability of core system components. [...]
The decision to adopt sudo-rs is in line with Canonical's commitment to Carefully But Purposefully increase the resilience of critical system software, by adopting Rust. Rust is a programming language with strong memory safety guarantees that eliminates many of the vulnerabilities that have historically plagued traditional C-based software. Sudo-rs is part of the Trifecta Tech Foundation's Privilege Boundary initiative, which aims to handle privilege escalation with memory-safe alternatives. |
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Did you know there's an initiative to drive Open Source adoption both within the United Nations — and globally? Launched in March, it's the work of the Digital Technology Network (under the UN's chief executive board) which "works to advance open source technologies throughout UN agencies," promoting "collaboration and scalable solutions to support the UN's digital transformation." Fun fact: The first group to endorse the initiative's principles was the Open Source Initiative... "The Open Source Initiative applauds the United Nations for recognizing the growing importance of Open Source in solving global challenges and building sustainable solutions, and we are honored to be the first to endorse the UN Open Source Principles," said Stefano Maffulli, executive director of OSI. But that's just the beginining, writes It's FOSS News: As part of the UN Open Source Principles initiative, the UN has invited other organizations to support and officially endorse these principles. To collect responses, they are using CryptPad instead of Google Forms... If you don't know about CryptPad, it is a privacy-focused, open source online collaboration office suite that encrypts all of its content, doesn't log IP addresses, and supports a wide range of collaborative documents and tools for people to use. While this happened back in late March, we thought it would be a good idea to let people know that a well-known global governing body like the UN was slowly moving towards integrating open source tech into their organization... I sincerely hope the UN continues its push away from proprietary Big Tech solutions in favor of more open, privacy-respecting alternatives, integrating more of their workflow with such tools. 16 groups have already endorsed the UN Open Source Principles (including the GNOME Foundation, the Linux Foundation, and the Eclipse Foundation). Here's the eight UN Open Source Principles:
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"Researchers have created the first laboratory analog of the 'black hole bomb'," reports ScienceAlert, "a theoretical concept developed by physicists in the 1970s..." There's no black hole involved; their experiment just simulates the "electromagnetic analogue" of the theoretical concept — the "exponential runaway amplification of spontaneously generated electromagnetic modes." Or, as ScienceAlert puts it, "It doesn't, just to set your mind at ease, pose any danger. It consists of a rotating aluminum cylinder, placed inside layers of coils that generate magnetic fields that rotate around it, at controllable speeds." As Roger Penrose proposed in 1971, the powerful rotational energy of a spinning black hole could be used to amplify the energy of nearby particles. Then, physicist Yakov Zel'Dovich figured out that you didn't need a black hole to see this phenomenon in action. An axially symmetrical body rotating in a resonance chamber, he figured, could produce the same energy transfer and amplification, albeit on a much smaller scale. Later work by other physicists found that, if you enclose the entire apparatus in a mirror, a positive feedback loop is generated, amplifying the energy until it explodes from the system. This concept was named the black hole bomb, and a team of physicists led by Marion Cromb of the University of Southampton in the UK now claim to have brought it to life. A paper describing their experiment has been uploaded to preprint server arXiv... [W]hat the team's experiment does is simulate it, using magnetic fields as a proxy for the particles, with the coils around the system acting as the reflector to produce the feedback loop. When they ran the experiment, they found that, when the cylinder is rotating faster than, and in the same direction as, the magnetic field, the magnetic field is amplified, compared to when there is no cylinder. When the cylinder rotates more slowly than the magnetic field, however, the magnetic field is dampened. This is a really interesting result, because it demonstrates a very clear amplification effect, based on the theories described decades ago... Because we can't probe black holes directly, analogs such as this are an excellent way to understand their properties... [T]he experiment could represent a significant step towards better understanding the physics of the most gravitationally extreme objects in the Universe. "The exponential amplification from noise supports theoretical investigations into black hole instabilities," the researchers write, "and is promising for the development of future experiments to observe quantum friction in the form of the Zeldovich effect seeded by the quantum vacuum..." |
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NASA's SPHEREx space observatory has officially begun its two-year mission to map the entire sky in 102 infrared wavelengths, capturing about 3,600 images daily to create 3D maps of hundreds of millions of galaxies. Its goal is to unlock new insights into cosmic inflation, the origins of galaxies, and the building blocks of life in the Milky Way by using spectroscopy to analyze light and matter across the universe. From a press release: From its perch in Earth orbit, SPHEREx peers into the darkness, pointing away from the planet and the Sun. The observatory will complete more than 11,000 orbits over its 25 months of planned survey operations, circling Earth about 14.5 times a day. It orbits Earth from north to south, passing over the poles, and each day it takes images along one circular strip of the sky. As the days pass and the planet moves around the Sun, SPHEREx's field of view shifts as well so that after six months, the observatory will have looked out into space in every direction.
When SPHEREx takes a picture of the sky, the light is sent to six detectors that each produces a unique image capturing different wavelengths of light. These groups of six images are called an exposure, and SPHEREx takes about 600 exposures per day. When it's done with one exposure, the whole observatory shifts position -- the mirrors and detectors don't move as they do on some other telescopes. Rather than using thrusters, SPHEREx relies on a system of reaction wheels, which spin inside the spacecraft to control its orientation. Hundreds of thousands of SPHEREx's images will be digitally woven together to create four all-sky maps in two years. By mapping the entire sky, the mission will provide new insights about what happened in the first fraction of a second after the big bang. In that brief instant, an event called cosmic inflation caused the universe to expand a trillion-trillionfold. |
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"The U.S. and Canadian websites for Lenovo offered U.S. $140 and CAD $211 off on the same ThinkPad X1 Carbon model when choosing any one of the Linux-based alternatives," reports It's FOSS News:
This was brought to my attention thanks to a Reddit post... Others then chimed in, saying that Lenovo has been doing this since at least 2020 and that the big price difference shows how ridiculous Windows' pricing is... Not all models from their laptop lineup, like ThinkPad, Yoga, Legion, LOQ, etc., feature an option to get Linux pre-installed during the checkout process. Luckily, there is an easy way to filter through the numerous laptops. Just go to the laptops section (U.S.) on the Lenovo website and turn on the "Operating System" filter under the Filter by specs sidebar menu. The article end with an embedded YouTube video showing a VCR playing a videotape of a 1999 local TV news report... about the legendary "Windows Refund Day" protests. Slashdot ran numerous stories about the event — including one by Jon Katz... |
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Celebrating Git's 20th anniversary, GitHub hosted a Q&A with Linus Torvalds, writes Its FOSS News. Among the other revelations: He says his college-age daughter sent a texting saying he's better known at her CS lab for Git than for Linux, "because they actually use Git for everything there." Which he describes as "ridiculous" because he maintained it for just four months before handing it off to Junio Hamano who's been heading up development for more than 19 years now. "When it did what I needed," Torvalds says, "I lost interest." Linus then goes on to share how Git was never a big thing for him, but a means to an end that prevented the Linux kernel from descending into chaos over the absence of a version control system. You see, before Git, Linux used BitKeeper for version control, but its proprietary licensing didn't sit too well with other Linux contributors, and Linus Torvalds had to look for alternatives. As it turned out, existing tools like CVS and Subversion were too slow for the job at hand, prompting him to build a new tool from scratch, with the coding part just taking 10 days for an early self-hostable version of Git. In its initial days, there were some teething issues, where users would complain about Git to Linus, even finding it too difficult to use, but things got calmer as the tool developed further. Torvalds thinks some early adopters had trouble because they were coming from a background that was more like CVS. "The Git mindset, I came at it from a file system person's standpoint, where I had this disdain and almost hatred of most source control management projects, so I was not at all interested in maintaining the status quo." |
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Software engineer and longtime Slashdot reader, Dmitry Grinberg (dmitrygr), shares a recent project they've been working on: "an interactive-speed Linux on a tiny board you can easily build with only 3 8-pin chips": There was a time when one could order a kit and assemble a computer at home. It would do just about what a contemporary store-bought computer could do. That time is long gone. Modern computers are made of hundreds of huge complex chips with no public datasheets and many hundreds of watts of power supplied to them over complex power delivery topologies. It does not help that modern operating systems require gigabytes of RAM, terabytes of storage, and always-on internet connectivity to properly spy on you. But what if one tried to fit a modern computer into a kit that could be easily assembled at home? What if the kit only had three chips, each with only 8 pins? Can it be done? Yes. The system runs a custom MIPS emulator written in ARMv6 assembly and includes a custom bootloader that supports firmware updates via FAT16-formatted SD cards. Clever pin-sharing hacks allow all components (RAM, SD, serial I/O) to work despite the 6 usable I/O pins. Overclocked to up to 150MHz, the board boots into a full Linux shell in about a minute and performs at ~1.65MHz MIPS-equivalent speed.
It's not fast, writes Dmitry, but it's fully functional -- you can edit files, compile code, and even install Debian packages. A kit may be made available if a partner is found. |