![Temporal dynamics of simulated civilizations across ten scenarios. (A) Mean trajectories of global technology T(t) with ±1 standard deviation shaded. (B) Mean resource levels R(t) with ±1 standard deviation shaded. -- [physics.soc-ph]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/Projections-of-Earth.png?resize=1200%2C720&ssl=1)
[physics.soc-ph] How long a technological civilization remains active, and what determines whether it collapses or persists, is a central question for both projecting humanity’s future and assessing the prevalence of […]
civilization
![Modes of interstellar expansion across two dimensions. The horizontal axis (expansion agent) runs from biological (crewed colonization, settlers, generation ships) to machine (autonomous probes, robotic seed systems). The vertical axis (visibility) runs from quiet (low-mass, low duty cycle, weak technosignatures) to loud (high-power, high waste heat, galaxy-scale signatures). The four quadrants summarize alternative expansion modes considered in the literature; the quiet expansion filter proposed in this paper occupies the lower-right quadrant (highlighted). -- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/Autonomous-AI-Cosmoindustry.png?resize=1200%2C717&ssl=1)
Posted inSETI & Technosignatures
Autonomous AI-Cosmoindustry and the Quiet Expansion Filter: A Threshold-Based Resolution of the Fermi Paradox
[astro-ph.IM] The Fermi paradox is sharpened, not weakened, by plausible extrapolations of artificial intelligence, autonomous robotics, in-situ resource utilization, orbital manufacturing, space-based computing, and uncrewed interstellar probes.
Posted inIntelligence & Language, Interstellar, Origin & Evolution of Life, SETI & Technosignatures, Status Report
Algorithmic Bottlenecks In Evolution: Genetic code, Symbolic Language, And The GreatFilter Hypothesis
The Great Filter hypothesis proposes that the emergence of technological societies capable of interstellar travel depends on a small number of exceptionally hard and highly improbable steps.
Posted inAstronomy & Telescopes, Biosignatures & Paleobiology, Habitable Zones, Imaging & Spectroscopy, Intelligence & Language, Interstellar, SETI & Technosignatures, Status Report
Rotational Doppler Cartography Of Technosignatures On Unresolved Planets
The discovery of many Earth-like planets has renewed interest in whether life and technological civilizations exist elsewhere.
Posted inBiosignatures & Paleobiology, Intelligence & Language, SETI & Technosignatures, Status Report
Constraining the Lifespan of Intelligent Technological Civilization in the Galaxy
In this work, we explore constraints on the emergence and longevity of technologically intelligent civilizations in our Galaxy, considering the Fermi paradox.
Posted inBiosignatures & Paleobiology, Gaia - Planetary Perspectives, Intelligence & Language, SETI & Technosignatures, Status Report
How Common Are Oxygenic Photosynthesis And Large Coal Deposits On Exoplanets?
In the search for extraterrestrial intelligence (SETI), it is often assumed that intelligent life on an Earth-like exoplanet would inevitably develop the technological means for interstellar communication. This assumption ignores […]
Posted inAstronomy & Telescopes, Biosignatures & Paleobiology, Imaging & Spectroscopy, Intelligence & Language, Press Release, SETI & Technosignatures
Microlensing Signatures Of Dyson Sphere-like Structures Around Primordial Black Holes As Technosignatures Of Extraterrestrial Advanced Civilizations
We investigate the microlensing detectability of extraterrestrial technosignatures originating from Dyson sphere – like structures, such as Dyson Swarms surrounding primordial black holes (PBHs).
Posted inBiosignatures & Paleobiology, Habitable Zones, Intelligence & Language, Origin & Evolution of Life, SETI & Technosignatures, Status Report
A Reassessment of the “Hard-steps” Model For The Evolution Of Intelligent Life
While there exist more contentious geochemical and molecular clock estimates for these steps that would place them each farther back in time, we have chosen the least controversial evidence to […]
Posted inAstronomy & Telescopes, Habitable Zones, SETI & Technosignatures, Societal Issues, Status Report
Percolation of ‘Civilisation’ in a Homogeneous Isotropic Universe
In this work, we consider the spread of a ‘civilisation’ in an idealised homogeneous isotropic universe where all the planets of interest are habitable. Following a framework that goes beyond […]
Posted inAstronomy & Telescopes, Biosignatures & Paleobiology, SETI & Technosignatures, Status Report
Report: Data-Driven Approaches to Searches for the Technosignatures of Advanced Civilizations
Humanity has wondered whether we are alone for millennia. The discovery of life elsewhere in the Universe, particularly intelligent life, would have profound effects, comparable to those of recognizing that […]