Results 61 to 70 of about 5,661,388 (213)

Six ‘Must-Have’ Minerals for Life’s Emergence: Olivine, Pyrrhotite, Bridgmanite, Serpentine, Fougerite and Mackinawite

open access: yesLife, 2020
Life cannot emerge on a planet or moon without the appropriate electrochemical disequilibria and the minerals that mediate energy-dissipative processes. Here, it is argued that four minerals, olivine ([Mg>Fe]2SiO4), bridgmanite ([Mg,Fe]SiO3), serpentine (
Michael J. Russell, Adrian Ponce
doaj   +1 more source

Autocatalytic Selection as a Driver for the Origin of Life

open access: yesLife
Darwin’s theory of evolution by natural selection was revolutionary because it provided a mechanism by which variation could be selected. This mechanism can only operate on living systems and thus cannot be applied to the origin of life. Here, we propose
Mike P. Williamson
doaj   +1 more source

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

open access: yesEnvironmental 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   +14 more
semanticscholar   +1 more source

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

open access: yesThe 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

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

open access: yesAnais 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   +9 more
doaj   +1 more source

Da Gud blev til en lille grøn mand fra Rummet

open access: yesReligionsvidenskabeligt Tidsskrift, 1992
The International Raëlian Movement, founded by the French journalist Claude Vorlihon (Raël) in 1974, is one of the best consolidated UFO-cults, now present in more than 40 countries.
Mikael Rothstein
doaj   +1 more source

Comparative study of methods for detecting extraterrestrial life in exploration mission of Mars and the solar system.

open access: yesLife sciences and space research, 2022
K. Enya   +3 more
semanticscholar   +1 more source

Editorial: Emerging plurality of life: Assessing the questions, challenges and opportunities

open access: yesFrontiers in Human Dynamics, 2023
Jessica Abbott   +2 more
doaj   +1 more source

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