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View article: Onset of slab mantle melting in Earth’s lower mantle: Evidence from ferropericlase in superdeep diamonds
Onset of slab mantle melting in Earth’s lower mantle: Evidence from ferropericlase in superdeep diamonds Open
Ferropericlase ([Mg x ,Fe 1-x ]O), the most common inclusion in sublithospheric diamonds, has a poorly understood crystallization history and depth of origin. Nineteen microscopic ferropericlase grains with different Mg#s were released fro…
View article: Planning Considerations Related to Contamination Control for the Return and Analysis of Martian Samples
Planning Considerations Related to Contamination Control for the Return and Analysis of Martian Samples Open
The joint National Aeronautics and Space Administration and European Space Agency Mars Sample Return (MSR) Campaign is a proposed multi-mission effort to bring selected geological samples from Mars to Earth for the purpose of scientific in…
View article: Redox-driven mineral and organic associations in Jezero Crater, Mars
Redox-driven mineral and organic associations in Jezero Crater, Mars Open
The Perseverance rover has explored and sampled igneous and sedimentary rocks within Jezero Crater to characterize early Martian geological processes and habitability and search for potential biosignatures1-7. Upon entering Neretva Vallis,…
View article: Mineralogical and Chemical Mapping of Martian Meteorite SaU 008 Using Deep UV Raman and Fluorescence Spectroscopy on Earth and Mars
Mineralogical and Chemical Mapping of Martian Meteorite SaU 008 Using Deep UV Raman and Fluorescence Spectroscopy on Earth and Mars Open
The NASA Mars 2020 mission Perseverance rover carries a piece of Martian meteorite Sayh al Uhaymir (SaU) 008 as part of the calibration payload for the SHERLOC science instrument. We report SHERLOC observations of the SaU 008 flight piece …
View article: Long-chain alkanes preserved in a Martian mudstone
Long-chain alkanes preserved in a Martian mudstone Open
Organic molecules preserved in ancient Martian rocks provide a critical record of the past habitability of Mars and could be chemical biosignatures. Experiments conducted by the Sample Analysis at Mars instrument onboard the Curiosity rove…
View article: Organic matter and biomarkers: Why are samples required?
Organic matter and biomarkers: Why are samples required? Open
The search for evidence of past prebiotic or biotic activity on Mars will be enhanced by the return of samples to Earth laboratories. While impressive analytical feats have been accomplished by in situ missions on the red planet, accessing…
View article: Diagenetic History and Biosignature Preservation Potential of Fine‐Grained Rocks at Hogwallow Flats, Jezero Crater, Mars
Diagenetic History and Biosignature Preservation Potential of Fine‐Grained Rocks at Hogwallow Flats, Jezero Crater, Mars Open
The Mars 2020 Perseverance rover discovered fine‐grained clastic sedimentary rocks in the “Hogwallow Flats” member of the “Shenandoah” formation at Jezero crater, Mars. The Hogwallow Flats member shows evidence of multiple phases of diagen…
View article: Inorganic interpretation of luminescent materials encountered by the Perseverance rover on Mars
Inorganic interpretation of luminescent materials encountered by the Perseverance rover on Mars Open
A major objective of the Mars 2020 mission is to sample rocks in Jezero crater that may preserve organic matter for later return to Earth. Using an ultraviolet Raman and luminescence spectrometer, the Perseverance rover detected luminescen…
View article: SARS-CoV-2 Dynamics in the English Premier League Testing Program
SARS-CoV-2 Dynamics in the English Premier League Testing Program Open
During 2020-2022, players and staff in the English Premier League in the United Kingdom were tested regularly for SARS-CoV-2 with the aim of creating a biosecure bubble for each team. We found that prevalence and reinfection estimates were…
View article: Astrobiological Potential of Rocks Acquired by the Perseverance Rover at a Sedimentary Fan Front in Jezero Crater, Mars
Astrobiological Potential of Rocks Acquired by the Perseverance Rover at a Sedimentary Fan Front in Jezero Crater, Mars Open
The Perseverance rover has collected seven oriented samples of sedimentary rocks, all likely older than the oldest signs of widespread life on Earth, at the exposed base of the western fan in Jezero crater, Mars. The samples include a sulf…
View article: Utilization of chemcam shot-to-shot data to identify and distinguish CA-SUL-FATE cemented bedrock from mixed vein-bedrock features
Utilization of chemcam shot-to-shot data to identify and distinguish CA-SUL-FATE cemented bedrock from mixed vein-bedrock features Open
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View article: Investigating the stability of aromatic carboxylic acids in hydrated magnesium sulfate under UV irradiation to assist detection of organics on Mars
Investigating the stability of aromatic carboxylic acids in hydrated magnesium sulfate under UV irradiation to assist detection of organics on Mars Open
The Scanning Habitable Environments with Raman and Luminescence for Organics and Chemicals (SHERLOC) instrument onboard the Mars 2020 Perseverance rover detected so far some of the most intense fluorescence signals in association with sulf…
View article: Characterizing Hydrated Sulfates and Altered Phases in Jezero Crater Fan and Floor Geologic Units With SHERLOC on Mars 2020
Characterizing Hydrated Sulfates and Altered Phases in Jezero Crater Fan and Floor Geologic Units With SHERLOC on Mars 2020 Open
The Mars 2020 Perseverance rover has explored fluvio‐lacustrine sedimentary rocks within Jezero crater. Prior work showed that igneous crater floor Séítah and Máaz formations have mafic mineralogy with alteration phases that indicate multi…
View article: Investigating the stability of aromatic carboxylic acids in hydrated magnesium sulfate under UV irradiation to assist detection of organics on Mars
Investigating the stability of aromatic carboxylic acids in hydrated magnesium sulfate under UV irradiation to assist detection of organics on Mars Open
The Scanning Habitable Environments with Raman and Luminescence for Organics and Chemicals (SHERLOC) instrument onboard the Mars 2020 Perseverance rover detected so far some of the most intense fluorescence signals in association with sulf…
View article: Commentary on: The Ponytail Lift: 22 Years of Experience in 600 Cases of Endoscopic Deep Plane Facial Rejuvenation
Commentary on: The Ponytail Lift: 22 Years of Experience in 600 Cases of Endoscopic Deep Plane Facial Rejuvenation Open
Journal Article Corrected proof Commentary on: The Ponytail Lift: 22 Years of Experience in 600 Cases of Endoscopic Deep Plane Facial Rejuvenation Get access Grady B Core, MD, Grady B Core, MD Corresponding Author: Dr Grady B. Core, 3595 G…
View article: Cover Feature: High‐pressure Synthesis of Cobalt Polynitrides: Unveiling Intriguing Crystal Structures and Nitridation Behavior (Chem. Eur. J. 32/2024)
Cover Feature: High‐pressure Synthesis of Cobalt Polynitrides: Unveiling Intriguing Crystal Structures and Nitridation Behavior (Chem. Eur. J. 32/2024) Open
A series of cobalt polynitrides has been discovered by using laser-heated diamond anvil cells under high pressure that demonstrate an increasing degree of nitrogen polymerization with increasing pressure. Synthesis under high pressure and …
View article: Experimental Identification of Potential Martian Biosignatures in Open and Closed Systems
Experimental Identification of Potential Martian Biosignatures in Open and Closed Systems Open
NASA's Perseverance and ESA's Rosalind Franklin rovers have the scientific goal of searching for evidence of ancient life on Mars. Geochemical biosignatures that form because of microbe-mineral interactions could play a key role in achievi…
View article: Depositional and Diagenetic Sulfates of Hogwallow Flats and Yori Pass, Jezero Crater: Evaluating Preservation Potential of Environmental Indicators and Possible Biosignatures From Past Martian Surface Waters and Groundwaters
Depositional and Diagenetic Sulfates of Hogwallow Flats and Yori Pass, Jezero Crater: Evaluating Preservation Potential of Environmental Indicators and Possible Biosignatures From Past Martian Surface Waters and Groundwaters Open
The Mars 2020 Perseverance rover has examined and sampled sulfate‐rich clastic rocks from the Hogwallow Flats member at Hawksbill Gap and the Yori Pass member at Cape Nukshak. Both strata are located on the Jezero crater western fan front,…
View article: Evidence of Sulfate‐Rich Fluid Alteration in Jezero Crater Floor, Mars
Evidence of Sulfate‐Rich Fluid Alteration in Jezero Crater Floor, Mars Open
Sulfur plays a major role in martian geochemistry and sulfate minerals are important repositories of water. However, their hydration states on Mars are poorly constrained. Therefore, understanding the hydration and distribution of sulfate …
View article: In-situ quantification of carbonate species concentrations, pH and pCO2 in calcite fluid inclusions using confocal Raman spectroscopy
In-situ quantification of carbonate species concentrations, pH and pCO2 in calcite fluid inclusions using confocal Raman spectroscopy Open
Carbonate minerals are globally distributed on the modern and ancient Earth and are abundant in terrestrial and marine depositional environments. Fluid inclusions hosted by calcite retain primary signatures of the source fluid geochemistry…
View article: Mineral-Mediated Oligoribonucleotide Condensation: Broadening the Scope of Prebiotic Possibilities on the Early Earth
Mineral-Mediated Oligoribonucleotide Condensation: Broadening the Scope of Prebiotic Possibilities on the Early Earth Open
The origin of life on earth requires the synthesis of protobiopolymers in realistic geologic environments along strictly abiotic pathways that rely on inorganic phases (such as minerals) instead of cellular machinery to promote condensatio…
View article: Diverse organic-mineral associations in Jezero crater, Mars
Diverse organic-mineral associations in Jezero crater, Mars Open
The presence and distribution of preserved organic matter on the surface of Mars can provide key information about the Martian carbon cycle and the potential of the planet to host life throughout its history. Several types of organic molec…
View article: Report of the Science Community Workshop on the proposed First Sample Depot for the Mars Sample Return Campaign
Report of the Science Community Workshop on the proposed First Sample Depot for the Mars Sample Return Campaign Open
The Mars 2020/Mars Sample Return (MSR) Sample Depot Science Community Workshop was held on September 28 and 30, 2022, to assess the Scientifically‐Return Worthy (SRW) value of the full collection of samples acquired by the rover Perseveran…
View article: Overview and Results From the Mars 2020 Perseverance Rover's First Science Campaign on the Jezero Crater Floor
Overview and Results From the Mars 2020 Perseverance Rover's First Science Campaign on the Jezero Crater Floor Open
The Mars 2020 Perseverance rover landed in Jezero crater on 18 February 2021. After a 100‐sol period of commissioning and the Ingenuity Helicopter technology demonstration, Perseverance began its first science campaign to explore the enigm…
View article: Samples Collected From the Floor of Jezero Crater With the Mars 2020 Perseverance Rover
Samples Collected From the Floor of Jezero Crater With the Mars 2020 Perseverance Rover Open
The first samples collected by the Mars 2020 mission represent units exposed on the Jezero Crater floor, from the potentially oldest Séítah formation outcrops to the potentially youngest rocks of the heavily cratered Máaz formation. Surfac…
View article: SHERLOC Raman Mineral Class Detections of the Mars 2020 Crater Floor Campaign
SHERLOC Raman Mineral Class Detections of the Mars 2020 Crater Floor Campaign Open
The goals of NASA's Mars 2020 mission include searching for evidence of ancient life on Mars, studying the geology of Jezero crater, understanding Mars' current and past climate, and preparing for human exploration of Mars. During the miss…