Results 21 to 30 of about 7,007 (208)

Structural Biosignatures—A Category of Potential Biosignatures in the Life Detection Knowledge Base

Astrobiology
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., Cavalazzi B., Davila A., Blank J., Murphy A., Potter-McIntyre S. L., Perl S., Cady S. L., McLoughlin N., Pohorille A., Corbin E., Westall F., Lima-Zaloumis J., Rainwater H., Des Marais D., Shkolyar S., Hickman-Lewis K., Noffke N., Bebout L., Rainwater, J.H., Corbin, E., Blank, J.G., Des Marais, D., Fisk, M., Cady, S.L., Westall, F., Lima-Zaloumis, J., Shkolyar, S., Davila, A.F., McLoughlin, N., Cavalazzi, B., Perl, S.M., Hickman-Lewis, Keyron, Noffke, N., Bebout, L., Pohorille, A., Murphy, A.E., Potter-McIntyre, S.L.   +37 more
core   +4 more sources

Biosignatures for Astrobiology

, 2018
International audienceLife on the early Earth inhabited a planet whose environment was vastly different from the Earth of today. An anaerobic and hot early Earth was the birthplace of the first living cells but wide-spread small-scale physico-chemical ...
Vago, Jorge, Cavalazzi, Barbara, Frances Westall, Westall, Frances, Barbara Cavalazzi, Keyron Hickman-Lewis, Cavalazzi B., Jorge L. Vago, Cavalazzi Barbara, Westall F., Foucher, Frédéric, Westall Frances, Exo-Mars Science Working Team, Cavalazzi, Barbara.editor.edthttp://id.loc.gov/vocabulary/relators/edt, Westall, Frances.editor.edthttp://id.loc.gov/vocabulary/relators/edt, Vago J. L., SpringerLink (Online service), HICKMAN-LEWIS, KEYRON   +17 more
core   +3 more sources

Is There Such a Thing as a Biosignature? [PDF]

Astrobiology, 2023
The concept of a biosignature is widely used in astrobiology to suggest a link between some observation and a biological cause, given some context. The term itself has been defined and used in several ways in different parts of the scientific community involved in the search for past or present life on Earth and beyond. With the ongoing acceleration in
Malaterre, Christophe, ten Kate, Inge Loes, Baqué, Mickael, Debaille, Vinciane, Grenfell, John Lee, Javaux, Emmanuelle J., Khawaja, Nozair, Klenner, Fabian, Lara, Yannick J., McMahon, Sean, Moore, Keavin, Noack, Lena, Patty, C.H. Lucas, Postberg, Frank   +13 more
openaire   +5 more sources

Translation as a Biosignature

Astrobiology, 2023
Life on Earth relies on mechanisms to store heritable information and translate this information into cellular machinery required for biological activity. In all known life, storage, regulation, and translation are provided by DNA, RNA, and ribosomes. Life beyond Earth, even if ancestrally or chemically distinct from life
Jordan M. McKaig, MinGyu Kim, Christopher E. Carr   +2 more
openaire   +3 more sources

The Ground-Based BIOMEX Experiment Verification Tests for Life Detection on Mars

Life, 2021
The success of an astrobiological search for life campaign on Mars, or other planetary bodies in the Solar System, relies on the detectability of past or present microbial life traces, namely, biosignatures.
Claudia Pacelli, Alessia Cassaro, Ilaria Catanzaro, Mickael Baqué, Alessandro Maturilli, Ute Böttger, Elke Rabbow, Jean-Pierre Paul de Vera, Silvano Onofri   +8 more
doaj   +1 more source

Biomineralization of primary carbonate cements: a new biosignature in the fossil record from the Anisian of Southern Italy

Lethaia, EarlyView., 2021
Biomineralization is a generic term used to indicate biological‐mediated mineral formation. In carbonate mineralization, nucleation of crystals can be: (1) controlled directly by the organisms, like in the skeletal formation of most metazoans; (2) induced by microbial communities, by indirect precipitation mediated by their metabolic activities; or (3)
Adriano Guido, Matteo Sposato, Giuseppe Palladino, Alessandro Vescogni, Domenico Miriello   +4 more
wiley   +1 more source

Oxygenic photosynthetic responses of cyanobacteria exposed under an M-dwarf starlight simulator: Implications for exoplanet’s habitability

Frontiers in Plant Science, 2023
IntroductionThe search for life on distant exoplanets is expected to rely on atmospheric biosignatures detection, such as oxygen of biological origin.
Mariano Battistuzzi, Mariano Battistuzzi, Lorenzo Cocola, Riccardo Claudi, Anna Caterina Pozzer, Anna Caterina Pozzer, Anna Segalla, Diana Simionato, Tomas Morosinotto, Tomas Morosinotto, Luca Poletto, Nicoletta La Rocca, Nicoletta La Rocca   +12 more
doaj   +1 more source

Remote and in-Situ Characterization of Mars Analogs: Coupling Scales to Improve the Search for Microbial Signatures on Mars

Frontiers in Astronomy and Space Sciences, 2022
Past environments on Mars contained abundant water, suggesting certain regions may have been conducive to life as we know it and implying the potential for microbial inhabitants.
Carolynn M. Harris, Matthew T. Maclay, Katherine A. Lutz, Vinitra Nathan, Noemi A. Ortega Dominguez, William D. Leavitt, William D. Leavitt, Marisa C. Palucis   +7 more
doaj   +1 more source

On biosignatures for Mars [PDF]

International Journal of Astrobiology, 2021
AbstractIn this work, we address the difficulty of reliably identifying traces of life on Mars. Several independent lines of evidence are required to build a compelling body of proof. In particular, we underline the importance of correctly interpreting the geological and mineralogical context of the sites to be explored for the presence of ...
Westall, Frances, Hickman-Lewis, Keyron, Cavalazzi, Barbara, Foucher, Frédéric, Clodoré, Laura, Vago, Jorge   +5 more
openaire   +2 more sources

Surface and Temporal Biosignatures [PDF]

, 2018
Recent discoveries of potentially habitable exoplanets have ignited the prospect of spectroscopic investigations of exoplanet surfaces and atmospheres for signs of life.
Schwieterman, Edward W
core   +2 more sources