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Tricorder Tech: What A Spacefaring Arctic Microbe Reveals About Life in Alien Oceans
[ISS National Laboratory] It lives in places where life should not exist. In the brine channels that thread through Arctic sea ice, it survives temperatures that would freeze most bacteria solid. Scientists have kept it at negative twenty degrees Celsius for eight months and watched it resume swimming the moment it thawed, as though nothing…
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Hot Spring Organism Breaks Record For Heat Tolerance Of Complex Life
[Cell Press] A tiny, single-celled organism can thrive at temperatures that would kill all other…
Quantifying The Temperature-dependent Yields Of N2 And N2H4 Formation In Vacuum-ultraviolet-irradiated NH3 Ice
[astro-ph.IM] Gas–grain astrochemical models predict that a substantial fraction of elemental nitrogen in dense cores…
The Science Potential of Characterizing Gas Giant Exoplanets with HWO
[astro-ph.EP] With the ability to directly image Earth-like exoplanets and search their atmospheres for biosignatures,…
Earth As A Potential Source Of Llife For Europa’s Subsurface Ocean
The paper discusses the possibility of dust particles containing living bacteria ejected from Earth reaching Europa and landing on its surface. It is shown that, taking certain factors into account, over a period of 30 − 80 Myr (the estimated age of Europa’s ocean), Jupiter’s moon would have been impacted…
Keep readingDust To Dust: Prospects For Passive Technosignatures As Relics Of ETI
Technological societies are separated in time, not just space — that is the lesson of the Drake equation. Might the best way to seek them be to find technosignatures that persist long after their creators? I present work I and my collaborators have done on the idea of passive technosignatures,…
Keep readingExoplanets, -moons, -comets
Astronomy & Telescopes
Atmospheres, Climate, Weather
Do Himalayan-style Mountains Lie Under The Antarctic ice: Implication For The Gondwana Supermountains, The Rise Of Oxygen And The Cambrian Explosion?
[Earth and Planetary Science Letters] Analyses of detrital zircons from Antarctica show that its tectonics were dominated by Himalayan-style mountains, the roots of which now underlie the ice sheet. These mountains formed during the amalgamation of Gondwana and when the Antarctic data are added to the global river zircon database and appropriately weighted, it is…
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Tricorder Tech: New Handheld Device Maps Chemical Composition Using Infrared Light
[Optica] Researchers have developed a compact, handheld mid-infrared imaging spectrometer that can produce high-resolution chemical maps of a sample without using any stains or labels.…
Water Planet Recon: How Accurately Can We Measure Earth Ocean’s Deepest Point?
[Research Organization of Information and Systems]. How deep is the deepest ocean—and how precisely can we actually measure it? Bathymetric maps obtained by each sounding…
Deep Learning of SHERLOC Raman Spectra For Facilitating Mars Astromaterial Identification
[Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy] Raman spectroscopy has been explored for planetary exploration, particularly through the SHERLOC instrument for Mars habitability and…
Imaging & Spectroscopy
JWST Reveals Refractory-Rich Water Ice in Interstellar Comet 3I/ATLAS: Evidence for a Continuum of Grain Properties across Protoplanetary Disks
[astro-ph.EP] We present JWST/NIRSpec PRISM observations of the interstellar comet 3I/ATLAS obtained on 2025 August 6 (Epoch 1), 2025 December 22 (Epoch 2), and 2026…
In situ Characterization Of Volatile And Refractory Hydrocarbons Produced By UV Photolysis Of Interstellar C2H2 Ice
[astro-ph.GA] Acetylene (C2H2) is commonly observed in star-forming regions, young stellar objects, and the Solar System. Laboratory and theoretical studies have linked this simplest alkyne…
Complex Water Systems Revealed On Early Mars
[NASA] A new study reveals that Jezero Crater’s enigmatic ‘Margin Unit’ was shaped by a complex sequence of ancient lakes, groundwater systems, and hydrothermal fluids.…
Biosignatures & Paleobiology
Tracing 700 Million Years Of Cell Evolution
[KAUST] Publishing in Nature Communications, a KAUST-led team has developed the AI tool Unify to help scientists compare similar cell types across distant species[1]. This…
Unveiling Microbial Communities And Biogeochemical Cycles In Antarctic Colored Snow
[BMC Microbiology]. Snow cover, the extensive terrestrial habitat in Antarctica, sometimes exhibits vivid coloration, yet the structure and function of its microbial communities remain poorly…
Local Constraints On Alcohol–Thioalcohol Analogs In G35.2N
[astro-ph.GA] The chemistry of sulfur-bearing complex organic molecules in dense star-forming environments remains uncertain, partly because the dominant sulfur reservoirs in dense gas and ices…