Results 101 to 110 of about 5,545 (213)
Structural Biosignatures—A Category of Potential Biosignatures in the Life Detection Knowledge Base
The Life Detection Knowledge Base (LDKB) is part of the Life Detection Forum (LDF) suite of webtools developed for life detection mission planners. This paper details the development of one of its categories of biosignatures, the Structure category.
Fisk M. +18 more
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Evaluating Biogenicity on the Geological Record With Synchrotron-Based Techniques
Frontiers in Microbiology, 2019 The biogenicity problem of geological materials is one of the most challenging ones in the field of paleo and astrobiology. As one goes deeper in time, the traces of life become feeble and ambiguous, blending with the surrounding geology.
Flavia Callefo +8 more
doaj +1 more source
Detectability of biosignatures in a low-biomass simulation of martian sediments [PDF]
, 2019 Discovery of a remnant habitable environment by the Mars Science Laboratory in the sedimentary record of Gale Crater has reinvigorated the search for evidence of martian life.
Cockell, C.S. +18 more
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Frontiers in Microbiology, 2017 The “Rare Earth” hypothesis—put forward by Ward and Brownlee in their 2000 book of the same title—states that prokaryote-type organisms may be common in the universe but animals and higher plants are exceedingly rare.
Stefan Fox, Henry Strasdeit
doaj +1 more source
Extreme Forward Scattering Observed in Disk-averaged Near-infrared Phase Curves of Titan
The Planetary Science JournalTitan, with its thick and hazy atmosphere, is a key world in our solar system for understanding light scattering processes. NASA’s Cassini mission monitored Titan between 2004 and 2017, where the derived data set includes a large number of whole disk ...
Chase Cooper +4 more
doaj +1 more source
Exoplanetary Biosignatures for Astrobiology
, 2018 Since life evolved on our planet there have been subtle interplays between biology and Earth System Components (atmosphere-lithosphere-ocean-interior). Life, for example, can impact weathering rates which, in turn, influence climate stabilizing feedback ...
John Lee Grenfell, Grenfell, John Lee
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An exploration of origin of life for exoplanetary science
Frontiers in Astronomy and Space SciencesThe factors that enable life to begin define the difference between an inhabited planet and one that is simply habitable. While used extensively in Origins, Worlds, and Life: A Decadal Strategy for Planetary Science and Astrobiology 2023–2032 ...
Finnegan Keller +5 more
doaj +1 more source
, 2014 Saturn's moon Enceladus is a new world for Astrobiology. Through the study of Enceladus' plumes new insights into its habitability will be gained. The four core parameters for life include: water, carbon, nitrogen, and energy; all were found in the plume.
Mckay, Chris P. +2 more
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Evaluating Biosignatures for Life Detection
, 2019 The goal here is to develop a conceptual framework for evaluating the ability of different biosignatures to provide evidence for the presence of life in planned missions or observational studies. The focus is on intrinsic characteristics of biosignatures
Pohorille, Andrew
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