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.
civilization
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 […]
Posted inAstrogeology, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, SETI & Technosignatures, Status Report
Fully Fluorinated Non-carbon Compounds NF3 And SF6 As Ideal Technosignature Gases
Waste gas products from technological civilizations may accumulate in an exoplanet atmosphere to detectable levels. We propose nitrogen trifluoride (NF3) and sulfur hexafluoride (SF6) as ideal technosignature gases.