In this work, we explore constraints on the emergence and longevity of technologically intelligent civilizations in our Galaxy, considering the Fermi paradox.
Intelligence & Language
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, Intelligence & Language, Interstellar, SETI & Technosignatures, Status Report
Undetected Past Contacts With Technological Species: Implications For Technosignature Science
In the search for extraterrestrial intelligence (SETI), the highly incomplete sampling of the technosignature search space is often considered as a plausible explanation for the persistent lack of detections over […]
Posted inAstrobiology (general), Intelligence & Language, Press Release, SETI & Technosignatures, Societal Issues
Astrobiology On Steroids
Well … it would seem that NASA will be paying more attention to Astrobiology now.
Posted inAstronomy & Telescopes, Biosignatures & Paleobiology, Intelligence & Language, Interstellar, Press Release, SETI & Technosignatures, Societal Issues
If Alien Signals Reached Earth, Why Haven’t We Seen Them?
Since the first SETI experiment in 1960, astronomers have scanned the Milky Way for signs of advanced extraterrestrial civilizations. These searches have covered radio waves, optical flashes, and infrared heat […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Intelligence & Language, SETI & Technosignatures, Status Report, Water/Hycean Worlds & Oceanography
A Narrowband Technosignature Search Toward The Hycean Candidate K2-18b Using The VLA And MeerKAT
K2-18b, a sub-Neptune exoplanet located in the habitable zone of its host star, has emerged as an important target for atmospheric characterization and assessments of potential habitability.
Posted inAstrochemistry, Biophysics, Biosignatures & Paleobiology, Genomics, Proteomics, Bioinformatics, Intelligence & Language, Origin & Evolution of Life, Panspermia, Status Report
Can The Timing Of The Origin Of Life Be Inferred From Trends In The Growth Of Organismal Complexity?
The origin of life embodies two fundamental questions: how and when did life begin? It is commonly conjectured that life began on Earth around 4 billion years ago.
Posted inAstronomy & Telescopes, Biosignatures & Paleobiology, Imaging & Spectroscopy, Intelligence & Language, Interstellar, SETI & Technosignatures, Status Report
WISE/CatWISE Constraints On Dysonian Waste-Heat Technosignatures In Nearby Galaxies
We search for galaxy-scale (Dysonian) waste heat in the mid-infrared using WISE. Starting from the 2MASS Redshift Survey (2MRS), we cross-match to CatWISE2020 and AllWISE, apply standard MIR AGN/starburst vetoes […]
Posted inAstronomy & Telescopes, Biosignatures & Paleobiology, Citizen Science / Open Science, Intelligence & Language, People Of Astrobiology, Press Release, SETI & Technosignatures
SETI@Home Enthusiasts Used Home Computers To Search For ET. Scientists Focus On 100 signals They Found
For 21 years, between 1999 and 2020, millions of people worldwide loaned UC Berkeley scientists their computers to search for signs of advanced civilizations in our galaxy.
Posted inAstrochemistry, Imaging & Spectroscopy, Intelligence & Language, Status Report
Time-dependent Chemical Evolution During Cloud Formation: H2-regulated Chemistry In Diffuse Molecular Cloud
We investigate the chemical evolution of a forming molecular cloud behind an interstellar shock wave. We conduct three-dimensional magnetohydrodynamics simulations of the converging flow of atomic gas, including a simple […]