Department of Earth, Environmental & Planetary Sciences
Communications Earth & Environment

Evidence for a composite volcano on the rim of Jezero crater on Mars

DEEPS Graduate Student Sara Cuevas-Quiñones recently published a new paper in Communications Earth & Environment, exploring the morphological, thermophysical, and mineralogical properties of a mountain on the Jezero crater of Mars. Cuevas-Quiñones and her team explain how radioisotope dating of igneous rock samples cached by Perseverance could eventually make this the first volcano of precisely known age on another terrestrial planet.
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University of Colorado Boulder, Research & Innovation Office

Planetary scientist Bethany Ehlmann named new director of LASP

Dr. Bethany Ehlmann, a 2010 graduate of Brown with with a PhD and MS in geology, has been named director of the Laboratory for Atmospheric and Space Physics (LASP) at the University of Colorado Boulder. LASP’s mission is to advance scientific discovery and inspire the next generation through forefront research, innovation and education.
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New research finds that despite large rivers and seas of liquid methane, Saturn’s moon Titan seems mostly devoid of river deltas, raising new questions about the surface dynamics on this alien world.
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Fraser Cain: Universe Today Podcast

Getting To Mercury with NO Propellant

Solar sails aren't only good for getting to Mars and beyond. In fact, they can be more efficient when going towards the Sun. Professor Steve Parman joins Youtuber Fraser Cain to discuss his proposed Mercury Scout mission.
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In a recent episode on Planetary Radio, Postdoc Adomas (Adam) Valantinas joins host Sarah Al-Ahmed to discuss his team’s discovery that Mars’ iconic red dust is likely dominated not by hematite but by a hydrated mineral called ferrihydrite.
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During the 2025 Lunar and Planetary Science Conference, researchers, including DEEPS Professor Jim Head, shared how NASA NIAC-funded technologies could enable building and maintaining surface habitats in lunar lava tubes and dike tip voids for long-term human space exploration.
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NASA’s Curiosity rover has detected what could be a chemical relic of long-ago life on Mars: long-chain organic molecules likely derived from fatty acids, a common building block of cell membranes on Earth. DEEPS Professor Jack Mustard commented on these exciting findings, suggesting that Curiosity’s successor, Perseverance, will likely find similar molecules.
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NASA has chosen eight scientists to participate in its Lucy mission, including Fiona Nichols-Fleming, a 2023 graduate of Brown's Department of Earth, Environmental Sciences and currently a Postdoctoral Research Geologist at the Center for Earth and Planetary Studies, Smithsonian National Air and Space Museum. The Lucy mission aims to study the Jupiter Trojan asteroids, which are considered remnants from the early solar system.
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A new study led by Brown University researchers shows how a water-rich mineral could explain the planet’s color, hinting at a wetter, more habitable past on the Red Planet.
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NASA Jet Propulsion Laboratory

NASA’s InSight Finds Marsquakes From Meteoroids Go Deeper Than Expected

Two new papers, coauthored by Associate Professor Ingrid Daubar, show that meteoroids striking Mars produce seismic signals that can reach deeper into the planet than previously known. Researchers used machine learning to find more than 100 new impact craters near NASA's InSight lander on Mars, many of which could be responsible for seismic events previously thought to be natural marsquakes.
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As part of a large-scale effort to unlock clues about the origins of life on Earth, Brown researchers in the NASA-funded Reflectance Experiment Laboratory (RELAB) are analyzing samples from the asteroid Bennu. Associate Professor Ralph Milliken spoke with the Brown Alumni Magazine about this exciting research, saying “It’s really amazing and humbling to know our group is one of a handful of specialized spectroscopy labs who are working with this material that has been in space for the last four and a half billion years."
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Postdoctoral Research Associate Andrea Rajšić has published new research in Journal of Geophysical Research: Planets, titled "Using the Melosh Model of Acoustic Fluidization to Simulate Impact Crater Collapse on the Earth and Moon." The publication explores the role of acoustic fluidization in crater collapse, examining vibration properties and their effects on subsurface deformation, with models improving upon simplified approaches to reproduce depth-to-diameter trends on Earth and the Moon.
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NASA Jet Propulsion Laboratory

NASA Mars Orbiter Spots Retired InSight Lander to Study Dust Movement

New images taken from space show how dust on and around InSight is changing over time — information that can help scientists learn more about the Red Planet. “Even though we’re no longer hearing from InSight, it’s still teaching us about Mars,” said science team member Ingrid Daubar, DEEPS Associate Professor (Research). “By monitoring how much dust collects on the surface — and how much gets vacuumed away by wind and dust devils — we learn more about the wind, dust cycle, and other processes that shape the planet.”

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Sky & Telescope

Icy Rivers May Have Flowed on Ancient Mars

New research led by Peter Buhler from the Planetary Science Institute proposes that a carbon-dioxide ice cap may have acted as an insulating layer on Mars, allowing rivers and a large lake to form in the planet’s southern highlands. DEEPS Professor James Head commented, "Peter Buhler has done a magnificent job of exploring the implications of possible massive atmospheric collapse and CO2 ice accumulation in the south circumpolar region at a critical early time in the history of Mars."
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New radiometric dating of material returned from the Moon suggests there was active volcanism 120 million years ago – nearly 2 billion years more recently than previous estimates. Assistant Professor James Dottin III shared his perspective, unconvinced that the three beads are conclusively volcanic.
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NASA has announced a new strategy review team, including DEEPS Professor Jack Mustard, to assess potential architecture adjustments for the agency’s Mars Sample Return Program. The program aims to bring back scientifically selected samples from Mars, and is a key step in NASA’s quest to better understand our solar system and help answer whether we are alone in the universe.
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The Europa Clipper spacecraft lifted off from Cape Canaveral on October 14th to find out whether the icy ocean of Jupiter's moon is habitable. “We’ll be able to describe what that habitable environment is like,” says Associate Professor Ingrid Daubar, who works on Clipper for NASA’s Jet Propulsion Laboratory (JPL) in Pasadena, California.
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DEEPS Assistant Professor James Dottin is featured in the latest installment of PBS's award-winning documentary series, NOVA. The five-part series premiers on October 2nd, and will focus on the solar system.
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