Results 191 to 200 of about 18,979 (288)

Mapping the Western Jezero Crater Rim From Orbit: Connections to Regional Geologic Units and Context for Exploration by the Mars 2020 Perseverance Rover

Journal of Geophysical Research: Planets, Volume 131, Issue 10, October 2026.
Abstract The Mars 2020 rover is currently traversing the western rim of Jezero, a Middle to Late Noachian‐aged crater formed by an impactor that struck the northwest edge of Isidis Planitia (hereafter referred to as the Isidis basin) on Mars. Previous studies suggest that pre‐Isidis basin and Noachian outcrops are preserved throughout this region ...
M. C. Deahn, B. Horgan, F. Calef III, J. Schroeder, K. M. Stack, N. R. Williams, S. Alwmark, C. C. Bedford, J. Bell, M. Bramble, E. Cloutis, L. Crumpler, T. Del Sesto, D. T. Flannery, B. Garczynski, E. Graser, S. Gwizd, L. Ives, L. Kah, A. Klidaras, C. Lesh, H. T. Manelski, L. E. Mayhew, C. Miller, M. Nachon, C. Quantin‐Nataf, N. Randazzo, E. Ravanis, P. Russell, J. I. Simon, J. R. C. Voigt   +30 more
wiley   +1 more source

Proto-Biosignatures and Planetary Geochemical Metabolism: A Thermodynamic Screening Model of Prebiotic Geochemical Organization. [PDF]

Life (Basel)
Spoto SE.
europepmc   +1 more source

NH4‐Smectites as Potential Precursors of Nitrogen Compounds Evolved During Analyses by the Sample Analysis at Mars (SAM) Instrument on the Curiosity Rover

Journal of Geophysical Research: Planets, Volume 131, Issue 10, October 2026.
Abstract Ammonium (NH4+) in the interlayer space of phyllosilicates has been proposed as a potential but underexplored nitrogen reservoir on Mars. We synthesized ammonium‐exchanged smectites (montmorillonite SWy‐2 and nontronite NAu‐2) and analyzed them, both as pure phases and in mixtures containing five or 20 wt.% magnesium (Mg) perchlorate, under ...
S. Andrejkovičová, A. C. McAdam, J. C. Stern, M. Millan, R. Navarro‐González, C. A. Knudson, S. T. Wieman, E. B. Rampe, D. W. Ming, C. N. Achilles, S. S. Johnson, F. Rocha, C. A. Malespin, P. R. Mahaffy   +13 more
wiley   +1 more source

Highlighting a science strategy for human exploration of Mars. [PDF]

Proc Natl Acad Sci U S A
Elkins-Tanton L, Newman D, Sheffer A, Krafton K.   +3 more
europepmc   +1 more source

Patterns and Drivers of Mercury Accumulation in Croplands, a Meta‐Analysis

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 10, October 2026.
Abstract Mercury (Hg) is a potent neurotoxin that poses risks to human and environmental health, particularly in regions influenced by anthropogenic Hg emissions. Although Hg emissions have declined across North America and Europe following regulatory controls and phase‐outs, emissions remain elevated in some regions due to activities such as artisanal
Jenna M. Hynes, Heidi Hausermann, Jacqueline R. Gerson   +2 more
wiley   +1 more source

Venus reawakening. [PDF]

Nat Commun
Maia J, Lefèvre M.
europepmc   +1 more source

On Vomiting of Habit [PDF]

BMJ, 1873
openaire   +2 more sources

Fifty Years Later: Revisiting Viking 2 Seismic Signals Through InSight

AGU Advances, Volume 7, Issue 7, October 2026.
Abstract For nearly 50 years, the origin of the candidate seismic signals recorded by Viking 2 remained unresolved because of limited instrumental sensitivity, onboard observation, data compression, and the absence of Martian seismic context. Here we reconstruct the Viking seismic workflow and reinterpret the two Viking candidate events, recorded on ...
Wanbo Xiao, Jiaqi Li, Yanbin Wang, Andrew Lazarewicz   +3 more
wiley   +1 more source

Drivers of Compound Marine Heatwaves and Acidity Extremes in the Southern Ocean

Global Biogeochemical Cycles, Volume 40, Issue 10, October 2026.
Abstract Our previous work revealed that between 1980 and 2019, Column‐Compound eXtremes (CCX) of Marine Heatwaves (MHW) and Ocean Acidity eXtremes (OAX) increased in frequency and intensity in the Southern Ocean (Wong et al., 2025, https://doi.org/10.1029/2025gb008630), disproportionately affecting the Antarctic zone and its Marine Protected Areas ...
Joel Wong, Matthias Münnich, Nicolas Gruber   +2 more
wiley   +1 more source

Subseafloor Temperature Variability During Ridge‐Flank Hydrothermal Circulation: Implications for a Moderate‐Temperature Earth System and Other Ocean Worlds

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract Subseafloor hydrothermal circulation drives biogeochemical exchange between the solid Earth and its ocean, and could play a similar role in other ocean worlds. We assess the scale of subseafloor temperature (T) variations during hydrothermal circulation in ∼3.5 Ma seafloor on the eastern flank of Juan de Fuca Ridge. This well‐studied, moderate
Donna K. Blackman, Kirt Robinson, Noah Randolph‐Flagg, Andrew T. Fisher, Julie A. Huber, Christopher R. German, Kristin L. Dickerson   +6 more
wiley   +1 more source