Results 61 to 70 of about 24,776 (261)

Water and the martian landscape [PDF]

open access: yesNature, 2001
Over the past 30 years, the water-generated landforms and landscapes of Mars have been revealed in increasing detail by a succession of spacecraft missions. Recent data from the Mars Global Surveyor mission confirm the view that brief episodes of water-related activity, including glaciation, punctuated the geological history of Mars. The most recent of
openaire   +2 more sources

What Is Space Bioethics?

open access: yesBioethics, EarlyView.
ABSTRACT Classical bioethics examines moral issues in terrestrial medicine and the life sciences. According to Konrad Szocik, space bioethics merely relocates those questions to harsher environments. We argue that this view is incomplete: space bioethics is a genuinely original domain.
Maurizio Balistreri
wiley   +1 more source

Erosion rate and previous extent of interior layered deposits on Mars revealed by obstructed landslides [PDF]

open access: yes, 2014
We describe interior layered deposits on Mars that have obstructed landslides before undergoing retreat by as much as 2 km. These landslides differ from typical Martian examples in that their toe height increases by as much as 500 m in a distinctive ...
Warner, N.H., Grindrod, Peter M.
core   +1 more source

Microbial growth in actual martian regolith in the form of Mars meteorite EETA79001

open access: yesCommunications Earth & Environment, 2023
Studies to understand the growth of organisms on Mars are hampered by the use of simulants to duplicate martian mineralogy and chemistry. Even though such materials are improving, no terrestrial simulant can replace a real martian sample.
Neveda Naz   +3 more
doaj   +1 more source

Thermospheric density responses to Martian dust storm in autumn based on MAVEN data

open access: yesGeodesy and Geodynamics, 2022
The unique seasonal surface dust storms on Mars have a significant impact on the Martian atmosphere. However, due to the lack of observations, semi-empirical models are difficult to simulate the density changes in the thermosphere with the existence of ...
Peng Han   +3 more
doaj   +1 more source

Development of CCMb: A Low‐Mg Calcite Reference Material for In Situ Measurement of δ18O, δ13C and Selected Trace Elements

open access: yesGeostandards and Geoanalytical Research, EarlyView.
Key Points Low‐Mg calcite RM developed for in situ microanalysis applications in palaeoclimatology (δ18O, δ13C; Mg, Sr m/m). New data for calcite CRM IAEA‐603 (δ18O, δ13C by SIMS and GS‐IRMS; Mg m/m). No detectable IMF effect of Mg on SIMS δ18O determinations for mass fractions < 3650 μg g‐1.
Andreas T. Hertwig   +13 more
wiley   +1 more source

Yihui423/Effects-of-Force-in-the-Martian-Plasma-Environment-with-Solar-Wind-Dynamic-Pressure-Enhancement: Effects of Force in the Martian Plasma Environment with Solar Wind Dynamic Pressure Enhancement

open access: yes, 2023
MHD simulation data for academic literature: Effects of Force in the Martian Plasma Environment with Solar Wind Dynamic Pressure ...
Yihui423
core   +1 more source

Trajectories of Martian Habitability [PDF]

open access: yesAstrobiology, 2014
Beginning from two plausible starting points—an uninhabited or inhabited Mars—this paper discusses the possible trajectories of martian habitability over time. On an uninhabited Mars, the trajectories follow paths determined by the abundance of uninhabitable environments and uninhabited habitats.
openaire   +2 more sources

An Alien Word? Cosmic Salvation within a Rahnerian Framework

open access: yesThe Heythrop Journal, EarlyView.
Abstract The possibility of life beyond our planet raises serious theological questions for Christians, particularly in the realm of soteriology. How would Jesus of Nazareth relate to such creatures? Is he the ‘universal’ saviour, in the cosmic sense? Or are there other incarnations of the Logos, the Word or Son of God?
Brandon R. Peterson
wiley   +1 more source

Novel solvent systems for in situ extraterrestrial sample analysis [PDF]

open access: yes, 2010
The life marker chip (LMC) is being designed to test for the chemical signature of life in the soil and rocks of Mars. It will use an antibody array as part of its detection and characterisation system and aims to detect both polar and non-polar ...
Baki, Alexander O.   +9 more
core   +1 more source

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