[astro-ph.EP] Orbiting in the habitable zone of its host star, the 1.7 R⊕, 5.6 M⊕ planet LHS 1140 b is a target of great interest.
Biogeochemical Cycles & Geobiology
Posted inVenus
Altered Cosmic Organics As Venus’ Ultraviolet Absorbers
[astro-ph.EP] Venus’ ultraviolet (UV) absorbers significantly contribute to the atmosphere’s energy budget. However, the composition of these absorbers remains a mystery.
Posted inAI - Data - Apps - Cybernetics
Autonomous Multi-Agent Reconstruction of Prebiotic Reaction Networks Reveals Organizational Features of Amino Acid Synthesis
[chemrxiv.org] Decades of origin-of-life research have uncovered hundreds of prebiotically plausible reactions across hydrothermal, surface, and biochemical environments, yet this knowledge remains fragmented across chemistry, geochemistry, and astrobiology. Here we […]
Posted inPlant Biology
Is A Constitutive Red-shift An Advantage For Oxygenic Photosynthesis Under M Dwarf Starlight? Insights From Acaryochloris Marina sp. str. Moss Beach
[FEMS Microbes] In the next decades, space telescope missions will search for life evidence on exoplanets, focusing on robust biosignatures associated with oxygenic photosynthesis, including atmospheric oxygen accumulation and the […]
Posted inBiosignatures & Paleobiology
Micropeloidal Textures – Definition, Formation And Potential As Biosignatures
[Earth-Science Reviews] Microbial biosignatures result from the interactions between microbial populations, metabolic processes, organic and mineral products, and the surrounding physicochemical environment.
![(a) Schematic of Europan ice-ocean system [related image in 11]. (b) Map of sea surface temperature (◦C) showing the transition between the temperature-stratified North Atlantic Ocean and the salt-stratified Arctic Ocean; (c) Potential temperature (left) and salinity (right) profiles with depth from location near the North Pole. Different water-mass characteristics are labeled. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/What-can.png?resize=1200%2C582&ssl=1)
Posted inWater/Hycean Worlds & Oceanography
What Can Planetary Ice Shells Teach Us about Ocean Mixing and Life, and Why Salt Matters
[astro-ph.EP] Past and present climates, both on Earth and in planetary systems, maintain ice covers with underlying oceans. This can range from sea ice in the Arctic Ocean to global […]
Posted inExoplanets, -moons, -comets
The Ingredients For Planets Formed Far Earlier Than Thought
[University of Portsmouth] The building blocks of rocky planets could have started forming just 100 million years after the Big Bang – long before the first galaxies even existed, according […]
Posted inExtremeophiles and Extreme Environments
Could Earthquakes Sustain Yellowstone’s Underground Life?
[USGS] When you think of earthquakes, “life-sustaining” might not be the phrase that immediately jumps to mind. If you haven’t experienced the destruction of an earthquake yourself, you’ve certainly seen […]
Posted inAtmospheres, Climate, Weather
Atmospheres As Habitats
[Astrobiology (Journal)]. The potential of planetary atmospheres as habitats is understudied and likely underestimated. Although planetary atmospheres can provide the fundamental physical, chemical, and energetic requirements for life, they also […]
Posted inHabitable Zones
Euhabitability: A New Term To Aid In The Search For Life In Addition To The Habitable Zone Framework
[Space Science Reviews] The search for life on exoplanets is difficult due to observational limitations stemming from vast separating distances. The Habitable Zone (HZ) is a simplifying framework for identifying […]