Results 81 to 90 of about 2,936 (194)

A Panspermia Origin for Venus Cloud Life

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Decades of study have hinted at the astrobiological potential of Venus's cloud layers. This potential is often cast as stemming from the idea that the Venusian surface was clement in the past. As the climate changed, life then remained in, or perhaps evolved and migrated to, the last habitable niche: the altitudes above ∼50 km with Earth‐like ...
E. Guinan, T. J. Austin, J. G. O’Rourke, N. G. Izenberg, E. A. Silber, E. Trembath‐Reichert   +5 more
wiley   +1 more source

The search for ancient life on Mars using morphological and mass spectrometric analysis: an analog study in detecting microfossils in Messinian gypsum

Frontiers in Astronomy and Space Sciences
Hydrated sulfate deposits have been detected on Mars. A spaceflight instrument capable of detecting microfossils in these salt deposits is highly important for the search for ancient life on Mars.
Youcef Sellam, Salome Gruchola, Marek Tulej, Peter Keresztes Schmidt, Andreas Riedo, Andreas Riedo, Sofiane Meddane, Peter Wurz, Peter Wurz   +8 more
doaj   +1 more source

The Spectroscopic Impact of Sublimation Under Martian Surface Conditions: Implications for Sample Analysis by the Rosalind Franklin Rover and Biosignature Preservation

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract The 2028 ESA/NASA Rosalind Franklin Mission (RFM) will search for signs of past and present life in the shallow subsurface of Mars. It is crucial to understand how minerals and any biosignatures uncovered during these sampling activities might change and be identified under today's Martian conditions.
Louisa J. Preston, Charles H. Minns, Ifigeneia Rousouli, Connor J. Ballard, Sadiazannat Mirdha, Lewis R. Dartnell   +5 more
wiley   +1 more source

Mercury's Tectonic and Geodynamic History: 1. Contractional Tectonic Landform Analysis and Tectonic Strain Using Machine Learning

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Mercury's tectonic record is dominated by shortening landforms, including lobate scarps, high‐relief ridges and wrinkle ridges. Previous analyses of these structures have used displacement–length ratios to constrain the planet's global contraction to a range of either no more than 2 km or up to 7 km.
A. Broquet, J. C. Andrews‐Hanna
wiley   +1 more source

To Mars through LEO: How commercial space travel will change exploration‐enabling research

Experimental Physiology, EarlyView.
Christopher Puhl, Michail Magkos
wiley   +1 more source

Hypogravity simulation using the Variable Gravity Suspension System: A technical report

Experimental Physiology, Volume 111, Issue 4, Page 1580-1596, 1 April 2026.
Abstract Human movement has evolved within Earth's gravitational environment (1 g; −9.81 m s−2). Future human exploration of terrestrial bodies, including the Moon (0.17 g; −1.62 m s−2) and Mars (0.38 g; −3.71 m s−2), will require astronauts to live and work within reduced gravitational environments (hypogravity).
Patrick Swain, Anthony Swain, Filipa Santos, Luke Hughes, Kirsty Lindsay, Ishbel Lomax, Claire Bruce‐Martin, Nick Caplan   +7 more
wiley   +1 more source

Life on Mars? The physiological perspective

Experimental Physiology, EarlyView.
Ronan M. G. Berg, Damian M. Bailey
wiley   +1 more source

Atmospheric Dynamics of IR‐Active Particles Released From Mars' Surface

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract Surface release of radiatively active particles, with high infrared‐ (IR‐)to‐visible extinction ratios, has been proposed as a method of warming Mars. However, to warm Mars using aerosols, particles released locally must disperse globally. Here we provide an initial reference study in a plume tracking, dry Martian atmospheric model to address ...
Mark I. Richardson, Samaneh Ansari, Bowen Fan, Ramses Ramirez, Hooman Mohseni, Michael A. Mischna, Michael H. Hecht, Liam J. Steele, Felix Sharipov, Edwin S. Kite   +9 more
wiley   +1 more source

Bacillus subtilis Spore Resistance to Simulated Mars Surface Conditions

Frontiers in Microbiology, 2019
In a Mars exploration scenario, knowing if and how highly resistant Bacillus subtilis spores would survive on the Martian surface is crucial to design planetary protection measures and avoid false positives in life-detection experiments.
Marta Cortesão, Felix M. Fuchs, Fabian M. Commichau, Patrick Eichenberger, Andrew C. Schuerger, Wayne L. Nicholson, Peter Setlow, Ralf Moeller   +7 more
doaj   +1 more source

The Apparent Involvement of ANMEs in Mineral Dependent Methane Oxidation, as an Analog for Possible Martian Methanotrophy

Life, 2011
On Earth, marine anaerobic methane oxidation (AOM) can be driven by the microbial reduction of sulfate, iron, and manganese. Here, we have further characterized marine sediment incubations to determine if the mineral dependent methane oxidation involves ...
Victoria J. Orphan, Christopher H. House, Emily J. Beal   +2 more
doaj   +1 more source