False biosignatures on Mars: anticipating ambiguity
S McMahon, J Cosmidis - Journal of the Geological Society, 2022 - lyellcollection.org
It is often acknowledged that the search for life on Mars might produce false positive results,
particularly via the detection of objects, patterns or substances that resemble the products of …
particularly via the detection of objects, patterns or substances that resemble the products of …
The habitability of Venus
Venus today is inhospitable at the surface, its average temperature of 750 K being
incompatible to the existence of life as we know it. However, the potential for past surface …
incompatible to the existence of life as we know it. However, the potential for past surface …
Perseverance rover reveals an ancient delta-lake system and flood deposits at Jezero crater, Mars
N Mangold, S Gupta, O Gasnault, G Dromart… - Science, 2021 - science.org
Observations from orbital spacecraft have shown that Jezero crater on Mars contains a
prominent fan-shaped body of sedimentary rock deposited at its western margin. The …
prominent fan-shaped body of sedimentary rock deposited at its western margin. The …
Cellular remains in a~ 3.42-billion-year-old subseafloor hydrothermal environment
Subsurface habitats on Earth host an extensive extant biosphere and likely provided one of
Earth's earliest microbial habitats. Although the site of life's emergence continues to be …
Earth's earliest microbial habitats. Although the site of life's emergence continues to be …
Origin of life on Mars: Suitability and opportunities
Although the habitability of early Mars is now well established, its suitability for conditions
favorable to an independent origin of life (OoL) has been less certain. With continued …
favorable to an independent origin of life (OoL) has been less certain. With continued …
Setting the geological scene for the origin of life and continuing open questions about its emergence
The origin of life is one of the most fundamental questions of humanity. It has been and is
still being addressed by a wide range of researchers from different fields, with different …
still being addressed by a wide range of researchers from different fields, with different …
A search for life in Palaeoproterozoic marine sediments using Zn isotopes and geochemistry
Abstract Sediments from the 2.1-to 1.9-billion-year-old Francevillian Group in southeastern
Gabon include centimeter-sized pyritized structures suggestive of colonial organisms (El …
Gabon include centimeter-sized pyritized structures suggestive of colonial organisms (El …
Relatively oxidized fluids fed Earth's earliest hydrothermal systems
D Trail, TM McCollom - Science, 2023 - science.org
The properties of high-temperature lithospheric fluids within the early Earth are poorly
known, yet many origin-of-life scenarios depend upon their characteristics. These fluids …
known, yet many origin-of-life scenarios depend upon their characteristics. These fluids …
An automatic peak deconvolution code for Raman spectra of carbonaceous material and a revised geothermometer for intermediate-to moderately high-grade …
S Kaneki, Y Kouketsu, M Aoya, Y Nakamura… - Progress in Earth and …, 2024 - Springer
Carbonaceous material (CM) undergoes progressive changes that reflect its thermal history.
These changes are in general irreversible and provide valuable information for …
These changes are in general irreversible and provide valuable information for …
Microbial biosignatures in ancient deep‐sea hydrothermal sulfides
Deep‐sea hydrothermal systems provide ideal conditions for prebiotic reactions and ancient
metabolic pathways and, therefore, might have played a pivotal role in the emergence of life …
metabolic pathways and, therefore, might have played a pivotal role in the emergence of life …