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During a pro-#Palestine demonstration at #Stockholm University, Swedish police forcibly restrained a 68-year-old man, causing him to lose consciousness.

#Police dragged him out of the building while he remained unconscious. The incident has sparked outrage among #activists and human rights groups, who are demanding an investigation into the use of excessive force.

t.me/QudsNen




One of the US states that put Donald Trump over the top in his election bid was Michigan - home to the largest Arab-American population in the country.

Trump won a majority of those Arab voters, in a stunning reversal of previous elections.

But how is that community reacting to Trump, and the moves he's made since taking office? Andy Roesgen went to find out.

youtube.com/watch?v=9uMe9nebWO…

🕎 🇵🇸 ☮️
#Gaza #Palestine



Un peu de rigolade (piquée à @Jac😎) 😄

Le sachiez-tu, en remplaçant les frites par des salsifis, tu peux perdre 97 % du peu de joie de vivre qu'il te reste dans cette vie
Did you know that by replacing French fries with salsify, you can lose 97% of the little joie de vivre you have left in this life?


#humour #joiedevivre



Fun fact: The Fediverse's roots trace back to Canada in 2008 with Laconica (created by @evan) which later became GNU/Social.

Fast forward 17 years, and history repeats itself - Pixelfed.social, now the most active Fediverse server, is proudly Canadian-made. 🇨🇦

#pixelfed #madeInCanada

Kushal Das 🇸🇪 reshared this.



#LPSC2025 abstracts dropped!
hou.usra.edu/meetings/lpsc2025…

First on the #JezeroDeltaScience list: stratigraphy analysis of Bright Angel on both channel "shores". Interesting clues and puzzles on the southern side.

Jones et al: "Is the Bright Angel formation a valley-confined lacustrine succession?"
hou.usra.edu/meetings/lpsc2025…

🧵 1/33

This entry was edited (10 months ago)
in reply to V Martín

New hashtag: #JezeroRimScience

A summary of the rim climb and what's happening outside the crater. Also "official" names for features, although figures are rather small.

Mayhew et al: "Strategic approach and first results from the Jezero crater rim campaign"
hou.usra.edu/meetings/lpsc2025…

🧵 2/n

This entry was edited (10 months ago)
in reply to Paul Hammond

@PaulHammond51 right? My fav was Gardevarri, had a basque cling to it but it turns out to be norwegian 😀

I haven't gone through it yet, but this one had other names new to me in fig. 1:
hou.usra.edu/meetings/lpsc2025…

in reply to V Martín

This one is mostly a gateway to other incoming abstracts, but it has plenty of names for features and abrasions that may have not been mentioned before or hard to place on the map. Also, there's that "suspended in time" rock @65dBnoise , with plenty of LCP 😉
mastodon.social/@65dBnoise/113…

Ravanis et al: "Diverse Igneous Rocks Observed During the Mars2020 Crater Rim Campaign in Jezero Crater Using Mastcam-Z Multispectral Data"
hou.usra.edu/meetings/lpsc2025…

3/n #JezeroRimScience

This entry was edited (10 months ago)
in reply to V Martín

I love the greenery covering the "suspended in time" rock! 😀

Here is a view of my map with some of the names I've collected from here and there, including a couple from this paper by Eleni Ravanis. Not all of them are visible; some appear at higher zoom.

#mars2020 #Solarocks #Space

in reply to V Martín

This one was surprisingly interesting and info-rich on what is to come for #JezeroRimScience

Tornabene & Osinski: "Exploring the Complexity of Mars' Ancient Crust on the Jezero Crater Rim"
hou.usra.edu/meetings/lpsc2025…

The approximate area included in fig. 3 here marked in MUTED and with CTX camera imagery. #PerseveranceRover is currently at the far left (north on the map) and fig. 2 is a subset further south.
muted.wwu.de/?x=77.335&y=18.43…

The HIRISE photo used
ode.rsl.wustl.edu/mars/indexpr…

🧵 4/n

This entry was edited (10 months ago)
in reply to V Martín

More #JezeroRimScience : hypothesizing on the impact statigraphy of the inner rim. Focused around Turquino and including a preliminary DCS analysis of #CrystalCreekJezero

Horgan, Alwmark (Lund University) et al: "A Possible Impactite Stratigraphy on the Jezero Inner Crater Rim Explored by #PerseveranceRover"
hou.usra.edu/meetings/lpsc2025…

Borrowing some context from reference [14] Osinski et al, non-paywalled in the wayback machine:
web.archive.org/web/2021020522…

🧵 5/n

in reply to V Martín

Interrupting my sequential traverse of abstracts; one thing lead to another and I ended up looking at the #LeopardSpots (+ "poppy seeds") papers, with "strong" wording for potential biosignatures.

Look at the much longer author list of this first one:

Hurowitz et al: "The Detection of a Potential Biosignature by #PerseveranceRover"
hou.usra.edu/meetings/lpsc2025…

A total of 4 related presentations in the Astrobiology session
hou.usra.edu/meetings/lpsc2025…

🧵 6/n #JezeroDeltaScience

This entry was edited (10 months ago)
in reply to V Martín

These are strong words 😉

Tice et al: "Physical and Chemical Constraints on Biotic and Abiotic Formation Mechanisms of "Poppy Seeds" and "#LeopardSpots"..."
hou.usra.edu/meetings/lpsc2025…

🧵 7/n #JezeroDeltaScience

in reply to V Martín

This one looks at the opposite shore of Neretva, where things are complicated by unsure stratigraphy (see post nr 1 in this thread). Also there's a lacking detection of organics. Abiotic processes are deemed "possible"

Broz et al :"Green Reduction Spots in Red Beds of the Bright Angel Formation and Implications for Biosignature Preservation Potential"
hou.usra.edu/meetings/lpsc2025…

🧵 8/n #JezeroDeltaScience #LeopardSpots #ReddestRock #MalgosaCrest

This entry was edited (1 month ago)
in reply to V Martín

Another temporary jump, maybe @65dBnoise & @PaulHammond51 are interested in this new DEM? There's a link to the data but didn't work for me, maybe won't be released until the conference.

Bland et al : "HiRISE Digital Elevation Model and Orthoimage Mosaics in Support of Perseverance Operations and MSR"
hou.usra.edu/meetings/lpsc2025…

🧵 9/n

in reply to V Martín

It's there, 5GB download.

try this:

astrogeology.usgs.gov/search/m…

in reply to 65dBnoise

@65dBnoise good, must have missed a char or something in copy/paste and got a 404, I need a proper keyboard! 🤣

Does this help then with the outer rim campaign and your qgis work?

in reply to V Martín

Back to #JezeroRimScience, continuing from post nr 5 in the thread. Paper on what SuperCam detected on the inner rim ridges, multitude of possible explanations, more work needed.

Bedford et al: "Geological Diversity in the Jezero Crater Rim Investigated with SuperCam: Insights into Impact Processes on Mars"
hou.usra.edu/meetings/lpsc2025…

Companion poster:
Quantin-Nataf et al: "Alteration diversity observed in the inner part of Jezero Crater Rim"
hou.usra.edu/meetings/lpsc2025…

🧵 10/n

This entry was edited (10 months ago)
in reply to V Martín

More on the high-silica rocks story, with references again to AEGIS_0910A (mastodon.social/@sharponlooker…). The whole paper is quotable, so I just hand-picked some extracts from the discussion. This is the first time I see them referring to Turquino and surroundings as a "suspected inverted fracture
network"

Beck et al: "From Hydrated Silica to Quartz: Potential Hydrothermal Precipitates Found in Jezero"
hou.usra.edu/meetings/lpsc2025…

🧵 11/n

#JezeroRimScience #JezeroDeltaScience


This rock photographed by Perseverance recently, was special enough to deserve its own paper

Beck et al : SuperCam Detections of Hydrated-Silica in the Jezero Crater
hou.usra.edu/meetings/lpsc2024…

"We present the identification of a hydrated-silica rich float rock by SuperCam within the Jezero crater."


in reply to V Martín

Y'all know IANAG, but are hydrothermal rocks often 'friable'? Asking for a friend :)
in reply to Paul Hammond

@PaulHammond51 😀 IANAG either, so I won't even try to answer that, other than referring to this in the paper: "Quartz and amorphous silica are stable under current Mars conditions, while other silicates, such as opal can dehydrate over time"
in reply to V Martín

Orbital analysis of #PerseveranceRover current stomping grounds. The proposed layered unit (nr 4) is compared to Bright Angel.

Gwizd et al: "Orbital Perspectives on the Witch Hazel Hill Region: Evidence for Structural Deformation of Possible Noachian Basement Material"
hou.usra.edu/meetings/lpsc2025…

🧵 12/n

#JezeroRimScience #WitchHazelHill

This entry was edited (10 months ago)
in reply to V Martín

A summary of the samples collected and to be collected by the rover.

Herd et al: "The Samples Collected by #PerseveranceRover: Enabling Decadal Science"
hou.usra.edu/meetings/lpsc2025…

🧵 13/n

#LeopardSpots

This entry was edited (10 months ago)
in reply to V Martín

Summary of prep groups & activity for MSR 🤞

Carrier et al: "#MarsSampleReturn Science Planning Updates"
hou.usra.edu/meetings/lpsc2025…

🧵 13/n

in reply to V Martín

New iteration on coatings from some of the same team that investigated the #JezeroPlaster

Garczynski et al: "Summary of Rock Coating Observations on Mars from Past Rover Missions"
hou.usra.edu/meetings/lpsc2025…

"Coatings on Mars form / Purple hues on ancient stone / Past climate revealed"

🧵 14/n

#JezeroDeltaScience

in reply to V Martín

#Nesquehonite #AmherstPoint #PelicanPoint

Srivastava et al: "In Situ Observation of Hydrated Carbonate in Jezero"
hou.usra.edu/meetings/lpsc2025…

"The study reports the first in situ occurrence of hydrated carbonate on Mars..."

#JezeroDeltaScience

🧵 15/n

in reply to V Martín

Poster on MSR planning

Harrington et al: "#MarsSampleReturn: Considerations for the Curation of Astromaterials from a Restricted Planet"
hou.usra.edu/meetings/lpsc2025…

"Technology development and feasibility studies for the proper curation of martain samples are underway. This research and technology development will be critical to inform the design of the Sample Receiving Facility and the concept of operations. "

🧵 16/n

This entry was edited (10 months ago)
in reply to V Martín

Poster on #FreyaCastle / "zebra rock". Not sure if we can see which one is #KautzCreek without the #PDSAnalystNotebook perhaps.

Klidaras et al: "The Enigma of "Zebra Rock": A Banded Rock Discovered on the Jezero Crater Rim"
hou.usra.edu/meetings/lpsc2025…

"Gaze through ancient lines / Secrets buried deep in time / Zebra stripes of Mars."

🧵 17/n

#JezeroRimScience #JezeroBrightRocks

This entry was edited (10 months ago)
in reply to V Martín

Poster for a new iteration of analysis of light-toned float rocks, and a suggested formation scenario. #spinel #kaolinite

Royer et al : "Mineral Diversity of Light-Toned Float Rocks in Jezero Crater as Seen by SuperCam"
hou.usra.edu/meetings/lpsc2025…

🧵 18/n

#JezeroDeltaScience #JezeroRimScience #JezeroBrightRocks

[EDIT]: final paper at nature.com/articles/s43247-024…

This entry was edited (10 months ago)
in reply to V Martín

Poster on very preliminary RIMFAX analysis of the Crater Rim campaing.

Cardarelli et al: "RIMFAX Ground Penetrating Radar Observations of Subsurface Structures in the Crater Rim of Jezero"
hou.usra.edu/meetings/lpsc2025…

🧵 19/n

#JezeroRimScience

This entry was edited (10 months ago)
in reply to V Martín

Interesting usage of #CuriosityRover 's RMI. Personally I found the unchanged dark streak most amazing.

Le Mouélic et al: "Gale's Yardang Unit Revealed by ChemCam Remote Microscopic Imager"
hou.usra.edu/meetings/lpsc2025…

"We describe the imaging campaign of the Yardang unit in Gale crater on Mars by the ChemCam instrument onboard the Curiosity rover. Different morphologies are progressively observed as the rover is getting closer of this geological unit."

🧵 20/n

in reply to V Martín

Since dust should be settling there like everywhere else… does this mean that streak is renewed with liquids slowly seeping out of the slope?
in reply to Thomas Sturm

IANAG

Sensitive content

in reply to V Martín

Vasavada & Fraeman: "#CuriosityRover: Status, Sulfur Surprise, and a Sneak Peak at Extended Mission 5"

"NASA's MSL recently explored a canyon carved by ancient flowing water and discovered native sulfur for the first time on Mars. A proposed fifth Extended Mission aims to understand the fate of habitability at and below the surface"

🧵 21/n

in reply to V Martín

Poster on the mid and upper delta traverse. A tad incomplete, I'd rather wait for the final paper for better understanding. At least, a verification that the Margin Unit predates the delta/fan.

Russell et al : "RIMFAX GPR Observations of the Jezero Crater Western Fan and Transition to Margin Unit"
hou.usra.edu/meetings/lpsc2025…

🧵 22/n

#JezeroDeltaScience

in reply to V Martín

Another really interesting poster that needs more work. It does already give good time-constraints for Bright Angel, although I could not find anywhere that BA would post-date the fan, as its conference summary says (maybe they mean the deformation folding).

Barnes et al : "Late Deformation of the Bright Angel Formation in Western Neretva Vallis"
hou.usra.edu/meetings/lpsc2025…

🧵 23/n

#JezeroDeltaScience

in reply to V Martín

Iteration on #SlopeStreaks, the figure is from the origin paper (doi.org/10.1016/j.icarus.2024.…)

Heyer et al: "Albedo Analysis of Martian Dust Devil-Induced Slope Streaks and Tracks"
hou.usra.edu/meetings/lpsc2025…

🧵 24/n

in reply to V Martín

Sharmili et al: "Exploring the Depositional and Erosional Morphology of Jezero Crater’s Western Fan Using Coupled Numerical Models of Sediment Deposition and Erosion"
hou.usra.edu/meetings/lpsc2025…

"Based on the two coupled numerical models, the present study uncovers the potential scenario for the preservation of the Jezero Crater's western fan by erosion-resistant boulder deposits (capping unit), maintaining its shape over billions of years."

🧵 25/n

#JezeroDeltaScience

in reply to V Martín

@stim3on ‼️ et al : "Photogrammetric Processing of MSL Images: A Case Study at the Mont Mercou Outcrop in Gale Crater"
hou.usra.edu/meetings/lpsc2025…

"We present a new pipeline to generate digital outcrop models (DOM) from Curiosity rover images and generated a new high resolution DOM of the Mont Mercou outcrop."

Low-res model: sketchfab.com/3d-models/mont-m…

🧵 26/n

This entry was edited (10 months ago)
in reply to V Martín

Lin et al : "Phenocryst Provenance from the Deep Interior Revealed by the Séítah Olivine in Jezero Crater"
hou.usra.edu/meetings/lpsc2025…

"Using refined terrestrial models of magma cooling, we analyzed the evolution of the Séítah parent magma and concluded that the olivine crystals are subsurface phenocrysts."

🧵 27/n

#JezeroCraterFloor

in reply to V Martín

Chide et al : "Search for In Situ Signatures of Electric Activity on Mars"
hou.usra.edu/meetings/lpsc2025…

"Signatures relevant of triboelectric discharges are observed in #PerseveranceRover SuperCam microphone data. It demonstrates the existence of electric activity in the atmosphere of Mars. Implications for this electric activity are discussed."

🧵 28/n

in reply to V Martín

Schwenzer et al: "Martian Atmosphere: Trapped, Adsorbed and Exchanged; Trapped, Adsorbed, and Sampled — Considerations for #MarsSampleReturn"
hou.usra.edu/meetings/lpsc2025…

"MSR will be a huge step towards understanding the Martian system in its entirety. A major factor for Martian habitability is its atmosphere. To fully understand the Martian surface environments, a pure atmospheric sample is paramount."

🧵 29/n

in reply to V Martín

There are four papers on the pure-sulphur deposit found by #CuriosityRover on #GedizVallis on the second half of this session:
hou.usra.edu/meetings/lpsc2025…

hou.usra.edu/meetings/lpsc2025…
hou.usra.edu/meetings/lpsc2025…
hou.usra.edu/meetings/lpsc2025…
hou.usra.edu/meetings/lpsc2025…

🧵 30/n

in reply to V Martín

This entry was edited (10 months ago)
in reply to V Martín

#TitanMoon ‼️ Excellent summary of the geology around the Huygens probe landing site. Works well with that great processing of the descent images by D. Machacek (mastodon.social/@sharponlooker…).

@mike_malaska et al : "Geological History of the Huygens Landing Site, Titan"
hou.usra.edu/meetings/lpsc2025…

🧵 33/n


great thread! I still have trouble wrapping my head around the descent video, but your description helped a lot.

I saw this fantastic processing by Daniel Machacek earlier today on bsky (see also his convo with @stim3on for more details) and now I can grasp it a bit better thx!

bsky.app/profile/danielmachace…


in reply to V Martín

Predicting a higher number of contact binary KBOs thanks to #NewHorizons observations from its privileged vantage point.

@simonbp et al : "Measuring the Shapes of Kuiper Belt Objects with New Horizons Photometry"
hou.usra.edu/meetings/lpsc2025…

🧵 34/n

in reply to V Martín

At least for bright ones; Rubin is only only going to get the close/big TNOs, but enough for statistics.
in reply to V Martín

Am I right in observing that all papers (at least those I've browsed through) have clear references to the necessity of the MSR mission? Looks like an orchestrated effort to put pressure to the administration to carry on with the mission, instead of stalling it to its death.
in reply to 65dBnoise

@65dBnoise I wouldn't say there is an orchestrated effort more than it is why Perseverance is where it is and doing what is doing. MSR is a "Decadal priority", and there's got to be continuing science on what needs to be done should the samples arrive safe.

That there's more of these references on those papers documenting what the rover is finding, of course could be seen as a way of "hyping", but also the normal course of science ("oh, that's interesting, we need more data" 😉)

in reply to V Martín

No, my observation (seeking confirmation) is only about the increase in mentions of the necessity of the MSR, not of the findings of the rover, which of course do increase as the rover continues to produce data.

I wouldn't say they're hyping it. I see an "orchestrated effort" as a good thing, a strong indication of consensus, with the scientific community converging and taking a stance on the importance of the MSR mission. Some have expressed doubts about that in conferences.

in reply to 65dBnoise

@65dBnoise the doubts I've seen were about the cost, lionizing a lot of the planetary science budget, specially before the audit. Other than that, it would be a shame to raise doubts when MSR was prioritized highest by the decadal survey...
in reply to V Martín

Here is a presentation where project scientist Ken Farley refers specifically to those doubts in length, and which I think initiated the confluence of support in those papers:

youtube.com/watch?v=61phIWESji…

This entry was edited (10 months ago)
in reply to V Martín

This proves my long held suspicion that no consideration has been given to studying the electromagnetic spectrum directly with RF receivers.

The simplest possible VLF receiver, or even the already existing UHF radios, could provide orders of magnitude more *direct* data than a microphone in the vicinity of a dust devil and PSU relaxation curves in Earth simulations can. But we haven't seen that opportunity being explored. 😐

in reply to V Martín

Peer-reviewed, open access version of the above (post nr 11)

Beck et al : "From hydrated silica to quartz: Potential hydrothermal precipitates found in Jezero crater"
doi.org/10.1016/j.epsl.2025.11…

h/t @IRAP astrodon.social/@IRAP/11410407…

#JezeroRimScience #JezeroDeltaScience #JezeroBrightRocks

This entry was edited (9 months ago)
in reply to V Martín

This paper doesn't mention at all vivianite and greigite, indicators the "life on Mars" (my hyped title) paper mentions, which makes its rather reserved dicussion much less persuasive, to an IANAG like me.

Interesting reading about those phosphates:

"Vivianite can also appear on the iron coffins or on the corpses of humans as a result of a chemical reaction of the decomposing body with the iron enclosure."

en.wikipedia.org/wiki/Vivianit…

in reply to 65dBnoise

@65dBnoise I don't know if this helps, but did you notice that this site is listed on the "main" paper?

mastodon.social/@sharponlooker…


Interrupting my sequential traverse of abstracts; one thing lead to another and I ended up looking at the #LeopardSpots (+ "poppy seeds") papers, with "strong" wording for potential biosignatures.

Look at the much longer author list of this first one:

Hurowitz et al: "The Detection of a Potential Biosignature by #PerseveranceRover"
hou.usra.edu/meetings/lpsc2025…

A total of 4 related presentations in the Astrobiology session
hou.usra.edu/meetings/lpsc2025…

🧵 6/n #JezeroDeltaScience


in reply to V Martín

I did, but I have to browse hundreds of sols in the PDS to find where and what it is: an area, place, rock, or a spot on a rock? It's a torture. For some reason Perseverance's team ignore the significance of named places and the way humans identify and remember stuff. Contrast that with Curiosity's team, who meticulously and joyfully publish names for every feature they identify, and then use those names to relate them to other named features. That's the human way of doing it.
in reply to 65dBnoise

@65dBnoise doesn't it at least help with the figure captions? WATSON sols 1242/1243, zcam 03962 sol 1242
in reply to V Martín

It does, but it raises another question. That place is where the Wallace Butte abrasion has been, or where I think that names belongs. More frequently than not the names are somewhat unclear as to what they refer to, unless it's one of those cases where an image is annotated with callouts pointing to the exact target. Otherwise, it can be more complicated, and in *any* case, it requires time.
in reply to 65dBnoise

@65dBnoise uh, did they change names? It is this one on "the reddest rock"

mastodon.social/@65dBnoise/112…

in reply to V Martín

Dunno, but I don't complain just for fun…
This vagueness with the names is a PITA. The only way to know is to see an image with a clear callout annotation POINTING to the named object, or a caption that mentions EXACTLY what we see in an image, or what name an object may be EXACTLY called. The latter is the case here (image).

Of course, the team don't have such problem. It's us who do.

in reply to V Martín

As it turns out, no, they didn't change names. The name of the red rock is still Wallace Butte, but the abrasion on it is called Malgosa Crest.


On stage: @mmaudet talking about open source LLMs - realtime demo of Lucie LLM

#soocon25 @openuk

This entry was edited (10 months ago)


A US military plane carrying 104 Indians, including 13 children, deported from America has landed in Amritsar. indiatoday.in/india/story/us-m…


Trump proposes U.S. control of Gaza in move that would permanently displace Palestinians byteseu.com/716552/ #Israel


Australian news and politics live updates: Reactions from Donald Trump’s plan to ‘take over’ Gaza byteseu.com/716548/ #Australia #Politics


I wrote about Google unveiling its 'responsible AI progress report' by quietly deleting the part of its AI principles where it promised not to work on weapons platformer.news/google-ai-prin…



Unemployment rises to 5.1 percent, highest level since 2020 byteseu.com/716546/ #Audio #CurrentAffairs #NewZealand #News #Podcasts #PublicRadio #RadioNewZealand #RNZ





🚀 Grande annonce ! Je lance un blog pour tous les passionnés de #FabLabs, de fabrication numérique et de #LogicielsLibres ! 🔧💡
Que vous soyez makers, curieux ou experts en open source, ce blog est fait pour vous !
📲 Venez explorer des projets inspirants, découvrir des outils et échanger sur nos passions !
🎯 Rejoignez-moi dès maintenant et partagez l’info avec votre réseau ! sylvaindenis.ovh/site/2025/02/…
#MakersMovement #OpenSource #DIY #Partage #Communauté
This entry was edited (10 months ago)



Yay! :blobcat: Now front camera works on Xiaomi Redmi4 (prada) with @postmarketOS

Green pic - from megapixels
Second pic - adjustments from prev post
Third pic - denoise + blur in gimp

Thank you for dt example, @valpackett
#photography #mobilelinux