Results 21 to 30 of about 32,396 (274)

Viroids-First—A Model for Life on Earth, Mars and Exoplanets

open access: yesGeosciences, 2019
The search for extraterrestrial life, recently fueled by the discovery of exoplanets, requires defined biosignatures. Current biomarkers include those of extremophilic organisms, typically archaea.
Karin Moelling, Felix Broecker
doaj   +1 more source

A Statistical Approach to Illustrate the Challenge of Astrobiology for Public Outreach

open access: yesLife, 2017
In this study, we attempt to illustrate the competition that constitutes the main challenge of astrobiology, namely the competition between the probability of extraterrestrial life and its detectability.
Frédéric Foucher   +3 more
doaj   +1 more source

A More Comprehensive Habitable Zone for Finding Life on Other Planets

open access: yesGeosciences, 2018
The habitable zone (HZ) is the circular region around a star(s) where standing bodies of water could exist on the surface of a rocky planet. Space missions employ the HZ to select promising targets for follow-up habitability assessment.
Ramses M. Ramirez
doaj   +1 more source

A philosophical and historical perspective about terms Astrobiology, Exobiology, Cosmobiology, Xenology and Bioastronomy

open access: yesRevista Opinião Filosófica, 2023
The main idea here is to present reflections on the general aspects that structure the conceptual conception of the field of search for extraterrestrial life.
Anelisa Heizer, Bruno Nascimento-Dias
doaj   +1 more source

The Role of Chemistry Across Disciplines From Humanities to Life Sciences in Understanding Complexity and Emergence

open access: yesAngewandte Chemie, EarlyView.
This study explores the origins of life by linking prebiotic chemistry, the emergence of information‐carrying molecules such as RNA and proteins, and philosophical questions about consciousness. The study emphasizes the role of molecular evolution in the Central Dogma and provides insights into the chemical origins of biology and the basis of life's ...
Harald Schwalbe   +5 more
wiley   +2 more sources

HOW VENUS BECAME COOL: SOCIAL AND MORAL DIMENSIONS OF BIOSIGNATURE SCIENCE

open access: yesZygon, 2021
A 2020 scientific report indicated the presence of phosphine, a potential biosignature chemical, in the atmosphere of Venus. As a result, Venus instantly became a global cultural celebrity.
doaj   +2 more sources

Multibeam Blind Search of Targeted SETI Observations toward 33 Exoplanet Systems with FAST

open access: yesThe Astronomical Journal, 2023
The search for extraterrestrial intelligence (SETI) is to search for technosignatures associated with extraterrestrial life, such as engineered radio signals.
Xiao-Hang Luan   +10 more
doaj   +1 more source

Signal coverage approach to the detection probability of hypothetical extraterrestrial emitters in the Milky Way

open access: yes, 2017
The lack of evidence for the existence of extraterrestrial life, even the simplest forms of animal life, makes it is difficult to decide whether the search for extraterrestrial intelligence (SETI) is more a high-risk, high-payoff endeavor than a futile ...
Grimaldi, Claudio
core   +1 more source

Finding extraterrestrial life using ground-based high-resolution spectroscopy [PDF]

open access: yes, 2013
Exoplanet observations promise one day to unveil the presence of extraterrestrial life. Atmospheric compounds in strong chemical disequilibrium would point to large-scale biological activity just as oxygen and methane do in the Earth's atmosphere.
Birkby, Jayne   +4 more
core   +3 more sources

Astrotheology’s contribution to public theology: From the extraterrestrial intelligence myth to astroethics

open access: yesHTS Teologiese Studies/Theological Studies, 2021
Public theology is conceived in the church, reflected on critically in the academy and addressed to the world for the sake of the world. The development of a theology of nature is included in the public theologian’s list of tasks of nature that is ...
Ted Peters
doaj   +1 more source

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