![From interstellar molecules to biomolecules. [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Frontiers.png?resize=1200%2C701&ssl=1)
[astro-ph.IM] The interstellar medium (ISM) contains a rich molecular inventory that provides a unique window into the chemistry operating during star and planet formation and its connection to prebiotic chemistry.
Biosignatures & Paleobiology
Posted inMars
Ancient Endorheic Lake Basins: Promising Sampling Sites for the Tianwen-3 Mars Sample Return Mission
[Astrobiology (Journal) via PubMed]. The China National Space Administration has announced its Mars Sample Return mission Tianwen-3 to search for life on Mars.
Posted inImpact events
Impact Crater Hydrothermal Systems Support Rapid Microbial Enrichment and Diverse Metabolic Potential
[Geobiology ] Impact crater hydrothermal systems, formed after asteroid and comet impacts, have been proposed as promising habitats for life on early Earth and as key targets in the search […]
![Grad-CAM autopsy at an amplitude of 4.0. (a) Q2_bright_hit: D1-3 S-shaped, detected. (b) Q2c_bright_mis: D1-1 extreme drift, missed. Columns: input, Grad-CAM map, and CAM difference (injected minus clean). Inputs are shown as the detector sees them: the three ON panels side by side, with frequency running vertically; white lines mark panel boundaries and the green line the injection’s starting channel. -- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Missed-Detections.png?resize=1200%2C720&ssl=1)
Posted inSETI & Technosignatures
Missed Detections and False Alarms in a CNN Technosignature Detector on Breakthrough Listen Data
[astro-ph.IM] Radio technosignature searches rely on machine learning detectors to shrink the candidate pool before a human looks at it.
Posted inHabitable Zones
A Hydrogen Atmosphere Could Keep Exomoons Habitable For Billions Of Years
[Max Planck Institute for Extraterrestrial Physics] Liquid water is considered essential for life. Surprisingly, however, stable conditions that are conducive to life could exist far from any sun.
Posted inDale Andersen's Field Reports
Astrobiologist Dale Andersen’s Antarctic Field Report: Preview: Fall 2026 Lake Untersee Field Season
Keith’s note: Dale Andersen is preparing for his second expedition to Lake Untersee, Antarctica for 2026. The first 2026 Field season at Lake Untersee was conducted from January – March […]
Posted inAtmospheres, Climate, Weather
Excess Oxygen Stored In Deep Earth Magma May Help Explain How Earth’s Atmosphere Became Oxygen-rich
[Science China Press] The research team, led by Dr. Yanhao Lin and Dr. Ho-kwang Mao of the Center for High Pressure Science and Technology Advanced Research (HPSTAR), together with Prof. […]
![Radiogenic dose and the benefit of drilling. (a) GCR dose versus depth for constant-depth and steadily exhuming horizons, compared with the depth-independent radiogenic dose. Shading spans the radiogenic dose of the baseline composition at 3 Ga (0.9 MGy) and that of the regional GRS abundances at 3.9 Ga (5.6 MGy). Where a curve crosses the radiogenic level, the two doses are equal. (b) Total-dose reduction at 100–101 and 199–200 cm versus exposure age; dashed lines are the GCR-only shielding factors. Dotted lines mark effective ages for 10 and 100 nm yr−1 exhumation. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/Radiation.png?resize=1200%2C720&ssl=1)
Posted inMars
Radiation Limits On Amino Acid Preservation And Chiral Measurement At Oxia Planum
[astro-ph.EP] Amino acid enantiomeric excess (EE) is a potential biosignature, but its measurement requires sufficient surviving material as well as preserved chirality.
![[Tree of Life] The Wellcome Sanger Institute’s Tree of Life programme has announced ambitious plans to accelerate publication of genome notes from approximately 30 per month to 200, expanding access to research that is supporting advances in agriculture, conservation, and medicine. This significant increase will be facilitated by a new specialised workflow developed by F1000 and the Wellcome Sanger Institute for Wellcome Open Research.](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/10/treeoflife1-2.jpg?resize=1200%2C722&ssl=1)
Posted inGenomics, Proteomics, Bioinformatics
Tree of Life Program Targets Publication Of 200 Genome Notes Per Month
Editor’s note: If we aspire to mount expeditions to new worlds and then embrace the task of characterizing and quantifying whatever life forms we find, the ability to map and […]
Posted inAtmospheres, Climate, Weather
Simulations Of The Evolving Ozone Layer: Implications For The Early Earth, Exoplanets, And The Search For Life
[astro-ph.EP] Over 4 billion years, Earth’s atmosphere has been transformed from a composition devoid of molecular oxygen (O2) to one where O2 is now 21% of our modern atmosphere by […]