[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 […]
Gaia – Planetary Perspectives
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 […]
Posted inBiosignatures & Paleobiology
Orbital Biosphere Assays: Lowering Barriers To Big Data
Editor’s note: When we begin to conduct Away Team visits to other worlds that host life we will need to do an assay of how everything on these worlds works […]
Posted inExtremeophiles and Extreme Environments
Rock-eating Fungi Flourish Deep Within Earth
[University of Michigan] Hundreds of feet below Earth’s surface, rocks and water teem with fungi and support complex ecosystems of tiny organisms, according to a University of Michigan study, which […]
Posted inExtinction events
Dinosaur-killing Asteroid Also Created A Dust Cloud That Insulated Earth, Charbroiling Cretaceous Creatures
[Purdue University] Sixty-six million years ago, an asteroid about the size of Mount Everest smacked into Earth near where the Yucatan Peninsula is today. That impact created the Chicxulub crater […]
Posted inAtmospheres, Climate, Weather
Triassic Inferno: Fires Raged Across Europe For thousands Of Years During Past Global Warming
[Utrecht University] The end-Triassic mass extinction, 201 million years ago, is linked to volcanism that resulted from the break-up of Pangea and which pumped out vast amounts of CO2 into […]
Posted inBiosignatures & Paleobiology
Substrate-Agnostic 3x: Biosignatures, Technosignatures, Ecologies
[physics.gen-ph] Substrate-agnostic perspectives are currently attracting increased attention. For example, it has become customary to refer to agnostic biosignatures to reflect the range of alternative extraterrestrial biospheres and to account […]
Posted inWater/Hycean Worlds & Oceanography
Deep-sea Creatures’ Epic Migrations Between Hydrothermal Vents
[University of Tokyo] Hydrothermal vents on the bottom of the ocean host a broad range of rare and unusual ecosystems. They can be spread very far apart, and yet there […]
![Averages over 100 trials of Siberian Traps injection scenario on a 31× 31 grid in the (fp, θ) parameter space. Mean number of DIC peaks (left), mean maximum DIC jump (top right), and mean time to return to equilibrium after end of injection phases (bottom right) are shown. The letters in the left panel correspond to parameters used in the example trials shown in Figure 10. -- [physics.ao-ph]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/Modeling-the-response.png?resize=1200%2C720&ssl=1)
Posted inAtmospheres, Climate, Weather
Modeling The Response Of Earth’s Marine Carbon Cycle To Extreme CO2 Injection Events
[physics.ao-ph] We explore how the response of a conceptual model of the marine carbon cycle depends on the way in which carbon is injected from the atmosphere.
Posted inHabitable Zones
When Stabilizing Feedbacks Wreak Havoc In Habitable Planets: Chaos At The Freezing Point In A Four-Feedback Climate Model
[astro-ph.EP] The long-term habitability of Earth-like planets is governed by the balance of positive and negative climate feedbacks that regulate surface temperature and atmospheric composition.