Results 11 to 20 of about 4,760 (150)

THE DETECTION OF A POTENTIAL BIOSIGNATURE BY THE PERSEVERANCE ROVER ON MARS

International audienceThe Perseverance rover has explored and sampled igneous and sedimentary rocks in Jezero crater to characterize early Martian geological processes and habitability and search for biosignatures.
Schulte, M., D., Moreland, E., L., Cloutis, Edward, A, Broz, Adrian, Kalucha, Hemani, Johnson, Jeffrey, Shuster, David L., Schmidt, Mariek E., Benzerara, Karim, Fouchet, Thierry, Siebach, Kirsten, L, Barr, P., A., O'Neil, L., P., Rice, Melissa S., Wolf, Z., U., Bell, James, F, Wogsland, Brittany, V., Paige, David, A., Tice, Michael M., Farley, Kenneth A., Hand, Kevin, P, Heirwegh, C, M, Simon, Justin, I, Weiss, Benjamin, Flannery, David, T., Allwood, Abigail, C., Hamran, Sven-Erik, Clavé, Elise, Tosca, N., J, Orenstein, B, J, Jones, M., W. M., Núñez, Jorge, I., A. Wade, L., Jorgensen, J., L., Gupta, Sanjeev, Brown, Adrian, J., Stack, Kathryn, M., Beyssac, Olivier, Mandon, Lucia, Sharma, Shiv, Barnes, Robert, Bechtold, A., Beck, Pierre, Cousin, Agnès, Fairén, Alberto, G, Garczynski, Brad, Uckert, K., Bosak, Tanja, Bhartia, R., Caravaca, Gwénaël, Hurowitz, Joel, A., Srivastava, A., Pascuzzo, Alyssa C., Manrique-Martinez, Juan Antonio, Quantin-Nataf, Cathy, Cardarelli, Emily, L, Mccubbin, F. M., Treiman, Allan, H., Dehouck, Erwin, Kizovski, T., V., Wiens, Roger, C., Li, A., Y., Murphy, A., E., Russell, Patrick, Fornaro, Teresa, Pedersen, David, Arge Klevang, Liu, Y., Bernard, Sylvain, Huggett, J., E., Frias, Jesus Martínez, Jorgensen, P., S., Jones, Alexander, J., Cable, Morgan L., Siljeström, Sandra, Vanbommel, Scott, J., Hickman-Lewis, Keyron, Paar, Gerard, Williford, Kenneth, Maki, Justin, Mangold, Nicolas, Kah, Linda, C., Steele, A., Hausrath, E., Herd, Christopher, D K, Davidoff, S, Goméz, F.   +85 more
core   +22 more sources

Detectability Simulations of a Near-infrared Surface Biosignature on Proxima Centauri b with Future Space Observatories [PDF]

The Planetary Science Journal
Telescope missions are currently being designed that will make direct imaging of habitable exoplanets possible in the near future, and studies are needed to quantify the detectability of biosignature features in the planet’s reflectance spectrum.
Connor O. Metz, Nancy Y. Kiang, Geronimo L. Villanueva, M. N. Parenteau, Vincent Kofman   +4 more
doaj   +2 more sources

The Call for a New Definition of Biosignature [PDF]

, 2023
The term biosignature has become increasingly prevalent in astrobiology literature as our ability to search for life advances. Although this term has been useful to the community, its definition is not settled.
Gillen, Catherine, McMahon, Sean, Vickers, Peter, Jeancolas, Cyrille   +3 more
core   +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

Machine Learning Algorithms Applied to Identify Microbial Species by Their Motility

Life, 2021
(1) Background: Future missions to potentially habitable places in the Solar System require biochemistry-independent methods for detecting potential alien life forms.
Max Riekeles, Janosch Schirmack, Dirk Schulze-Makuch   +2 more
doaj   +1 more source

Detection of biosignatures in Terrestrial analogs of Martian regions: Strategical and technical assessments

Earth and Planetary Physics, 2022
For decades, the search for potential signs of Martian life has attracted strong international interest and has led to significant planning and scientific implementation.
JianXun Shen, Yan Chen, Yu Sun, Li Liu, YongXin Pan, Wei Lin   +5 more
doaj   +1 more source

The Peak Absorbance Wavelength of Photosynthetic Pigments Around Other Stars From Spectral Optimization

Frontiers in Astronomy and Space Sciences, 2021
In the search for life on other planets, the presence of photosynthetic surface vegetation may be detectable from the colors of light it reflects. On the modern Earth, this spectral reflectance is characterized by a steep increase in reflectance between ...
Owen R. Lehmer, Owen R. Lehmer, David C. Catling, Mary N. Parenteau, Nancy Y. Kiang, Tori M. Hoehler   +5 more
doaj   +1 more source

Oxygen False Positives on Habitable Zone Planets Around Sun‐Like Stars

AGU Advances, 2021
Oxygen is a promising exoplanet biosignature due to the evolutionary advantage conferred by harnessing starlight for photosynthesis, and the apparent low likelihood of maintaining oxygen‐rich atmospheres without life.
Joshua Krissansen‐Totton, Jonathan J. Fortney, Francis Nimmo, Nicholas Wogan   +3 more
doaj   +1 more source

Modelling exo-biospheres for biosignature predictions [PDF]

Philosophical Transactions of the Royal Society B: Biological Sciences
Arwen E Nicholson
exaly   +2 more sources

The Hypothesis of a “Living Pulse” in Cells

Life, 2023
Motility is a great biosignature and its pattern is characteristic for specific microbes. However, motion does also occur within the cell by the myriads of ongoing processes within the cell and the exchange of gases and nutrients with the outside ...
Marina Walther-Antonio, Dirk Schulze-Makuch   +1 more
doaj   +1 more source