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?"

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.

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.

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.

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:

1. Open by default: Making Open Source the standard approach for projects
2. Contribute back: Encouraging active participation in the Open Source ecosystem
3. Secure by design: Making security a priority in all software projects
4. Foster inclusive participation and community building: Enabling and facilitating diverse and inclusive contributions
5. Design for reusability: Designing projects to be interoperable across various platforms and ecosystems
6. Provide documentation: Providing thorough documentation for end-users, integrators and developers
7. RISE (recognize, incentivize, support and empower): Empowering individuals and communities to actively participate
8. Sustain and scale: Supporting the development of solutions that meet the evolving needs of the UN system and beyond.