Results 91 to 100 of about 5,730,658 (292)

Iron and copper sulfides in asteroid (162173) Ryugu: Formation conditions and a comparison to the CI and CY chondrites

Meteoritics &Planetary Science, Volume 60, Issue 3, Page 506-528, March 2025.
Abstract JAXA's Hayabusa2 sample return mission visited the volatile‐rich carbonaceous (C‐type) asteroid (162173) Ryugu with the aim of ground‐truthing remote observations, returning a pristine sample from a C‐type asteroid, and strengthening links between asteroids and the meteorite collection. Here, we have conducted a systematic study of coarse (>10 
C. S. Harrison, A. J. King, R. H. Jones, S. S. Russell, T. Nakamura, H. Yurimoto, T. Noguchi, R. Okazaki, H. Yabuta, H. Naraoka, K. Sakamoto, S. Tachibana, T. Yada, M. Nishimura, A. Nakato, A. Miyazaki, K. Yogata, M. Abe, T. Okada, T. Usui, M. Yoshikawa, T. Saiki, S. Tanaka, F. Terui, S. Nakazawa, S. Watanabe, Y. Tsuda   +26 more
wiley   +1 more source

Should Evolution Necessarily be Egolution?

, 2017
In the article I study the evolutionary adaptivity of two simple population models, based on either altruistic or egoistic law of energy exchange. The computational experiments show the convincing advantage of the altruists, which brings us to a small ...
Ivanko, Evgeny
core   +1 more source

In Search of Extraterrestrial Artificial Intelligence Through Dyson Sphere–like Structures around Primordial Black Holes

The Astrophysical Journal
Are we alone? It is a compelling question that human beings have confronted for centuries. The search for extraterrestrial life is a broad range of quests for finding simple forms of life up to intelligent beings in the Universe. The plausible assumption
Shant Baghram
doaj   +1 more source

Multiplication of microbes below 0.690 water activity: implications for terrestrial and extraterrestrial life.

Environmental Microbiology, 2015
Since a key requirement of known life forms is available water (water activity; aw ), recent searches for signatures of past life in terrestrial and extraterrestrial environments have targeted places known to have contained significant quantities of ...
A. Stevenson, J. Burkhardt, C. Cockell, Jonathan A. Cray, J. Dijksterhuis, M. Fox‐Powell, T. Kee, G. Kminek, T. McGenity, K. Timmis, D. Timson, M. Voytek, F. Westall, M. Yakimov, J. E. Hallsworth   +14 more
semanticscholar   +1 more source

VIS‐to‐MIR reflectance and Raman spectroscopy of the CM2 NWA 12184 carbonaceous chondrite

Meteoritics &Planetary Science, Volume 60, Issue 3, Page 570-595, March 2025.
Abstract The spectral analysis of CM meteorites can help to constrain the mineralogical composition of their parent body, the C‐type asteroids. The CM2 NWA 12184 was spectrally examined employing seven complementary techniques at different spatial resolutions, including VIS‐to‐MIR reflectance and Raman spectroscopy.
A. Galiano, F. Dirri, M. Ferrari, C. Carli, E. Bruschini, G. Filacchione, G. Piccioni, E. Palomba, S. Stefani, A. Raponi, M. Ciarniello, M. E. Palumbo, C. Scirè Scappuzzo, G. Baratta, R. G. Urso, L. Inno   +15 more
wiley   +1 more source

Life-Detection Technologies for the Next Two Decades

, 2018
Since its inception six decades ago, astrobiology has diversified immensely to encompass several scientific questions including the origin and evolution of Terran life, the organic chemical composition of extraterrestrial objects, and the concept of ...
Bodas, Dhananjay, Carr, Christopher, Chen, Huan, Cleaves II, H. James, Fujii, Yuka, Furukawa, Yoshihiro, Genda, Hidenori, Gillams, Richard J., Giri, Chaitanya, Hamano, Keiko, Jia, Tony Z., Kameda, Shingo, Krishnamurthy, Ramanarayanan, Meinert, Cornelia, Meringer, Markus, Paknikar, Kishore, Rajamani, Sudha, Shivaji, Sisinthy, Steele, Andrew, Taniguchi, Masateru, Usui, Tomohiro, Yabuta, Hikaru, Yamagishi, Akihiko   +22 more
core  

Antarctic nematodes survival in Martian and Lunar regolith simulants under terrestrial conditions [PDF]

Anais da Academia Brasileira de Ciências
The exploration of extraterrestrial environments has become a focal point of scientific inquiry, driven by advancements in technology and a growing interest in the potential for life beyond Earth.
CESAR R.L. AMARAL, FÁBIO L.V. BONES, ANTONIO CARLOS DE FREITAS, RODRIGO GOLDENBERG-BARBOSA, MAITHÊ G.P. MAGALHÃES, LUCAS M. MOREIRA, DAFNE ANJOS, ANNA DONATO, ANTONIO AMORIM, PAULO E.A.S. CÂMARA   +9 more
doaj   +1 more source

Life in extraterrestrial environments Quarterly status report, 31 May - 31 Aug. 1967 [PDF]

Life studies of simulated extraterrestrial ...

core   +1 more source

Extraterrestrial Life and Censorship

, 2011
16 pages, 4 figures, for Journal of Cosmology Proceedings of "New Directions in Modern Cosmology" workshop, Lorentz Center, Leiden NE, Sept. 27 to Oct.
openaire   +2 more sources

Documenting microbial populations within the University of Alberta Meteorite Curation Facility using 16S rRNA gene sequencing: Implications for the curation of astromaterials

Meteoritics &Planetary Science, EarlyView.
Abstract Meteorites are easily contaminated at the Earth's surface by microbial activity. Here, DNA extracts from two meteorite specimens and samples from curation laboratory surfaces are analyzed with amplicon sequencing, to understand microbial communities that contaminate meteorites and that may be resident in curation facilities.
Libby D. Tunney, Aaron B. Regberg, Christopher D. K. Herd, Richard E. Davis, Christian L. Castro   +4 more
wiley   +1 more source