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Ancient Ocean

All articles tagged with #ancient ocean

science1 month ago•4 min saved

Ancient Mars likely hosted a vast ocean as Curiosity uncovers new organics

Scientists say Mars once hosted a giant ocean covering about a third of the planet, based on orbital mapping of a continental-shelf-like feature, while NASA's Curiosity rover found seven previously unseen organic molecules in a rock sample. The findings don’t prove past life, but they show Mars had the right chemistry for it and bolster the push to explore the planet further, including NASA’s plans for a future nuclear-powered mission.

via USA Today|

#ancient-ocean #astrobiology #curiosity-rover

space1 month ago•74 min saved

Mars Express spots ancient ocean clues in Utopia Planitia

European Space Agency’s Mars Express has captured high‑resolution images of Utopia Planitia showing dark, ancient volcanic ash spreading across the northern Martian plain. The new views—comparing with 1970s Viking data—suggest Mars’ surface features can change over decades, possibly due to wind redistributing ash or exposing underlying material. The imagery also highlights subsurface ice and ice-rich permafrost beneath the plains, along with tectonic features like grabens and scalloped depressions that trace Mars’ dynamic geology and the past presence of a large body of water in this region billions of years ago.

via Space|

#ancient-ocean #mars #mars-express

science1 month ago•50 min saved

Mars' Ancient Ocean Revealed, Organics Hint at Possible Life

New Martian findings point to an ancient ocean in Mars’ northern hemisphere and reveal seven previously undetected organic molecules in a Curiosity rock sample, a sign Mars once had habitable chemistry. While neither discovery proves past life, they strengthen the case that Mars could have supported life and build on earlier organics/biosignature hints. NASA notes these results amid ongoing exploration and upcoming missions, including plans for nuclear-powered technology to help future Mars research.

via Yahoo|

#ancient-ocean #curiosity-rover #mars

science1 month ago•74 min saved

Mars hints at a long-lived ocean through a vast ancient coastline

New analysis of Martian topography identifies a broad, flat coastal shelf in the planet’s northern hemisphere that would have sat roughly 1,800–3,800 meters below ancient sea level, suggesting a global ocean may have covered about a third of Mars for millions of years; accompanying delta patterns align with shorelines, making a long-lived ocean a plausible part of Mars’ past and guiding where sedimentary evidence of life might be found by future missions.

via Space|

#ancient-ocean #bathtub-ring #coastal-shelf

science1 month ago•179 min saved

Mars may have hosted a vast ancient ocean, researchers propose

NASA-backed simulations suggest Mars may have once been largely covered by an ocean, potentially about one-third of the planet, leaving behind a broad, flat coastal shelf around where shorelines would have been. Using Earth analogs and Mars Orbiter Laser Altimeter data, researchers say this signature—larger and more durable than a shoreline—could indicate a past ocean, though the lack of plate tectonics on Mars makes the case not definitive. If confirmed, the coastal shelf would provide a tangible target for future observations, including ESA's Rosalind Franklin rover, to help explain Mars' wetter past and its water loss.

via CNN|

#ancient-ocean #coastal-shelf #continental-shelf

science1 month ago•5 min saved

Northern Martian Shelf Points to a Long-Lived Ocean

Researchers identify a continental-shelf-like feature in Mars’ northern hemisphere, a stable topographic region suggesting a long-lasting ocean in the planet’s past. Published in Nature, the study argues that this shelf—more durable than shorelines on Mars—could record evidence of water and potential habitability, guiding future rover missions to explore deposits.

via The Daily Galaxy|

#ancient-ocean #astrobiology #continental-shelf

science1 month ago•51 min saved

Mars’s ancient ocean signature may lie in a global coastal shelf, not shorelines

Researchers show that Earth’s strongest ocean topographic signal is a broad continental shelf with low slope and curvature, not a single shoreline. When this method is applied to Mars, a distinct flat zone between about −1,800 m and −3,800 m emerges, suggesting a preserved coastal shelf and, by extension, a long-lived Martian ocean. The zone aligns with deltaic and river-form deposits and with previously proposed shorelines, supporting the coastal-shelf view as a robust indicator of ancient oceans on Mars, even in a world lacking plate tectonics.

via Nature|

#ancient-ocean #coastal-shelf #deltas

space4 months ago•2 min saved

Mars May Have Had a Vast Ancient Ocean, Traced by Canyon Deltas

Researchers using data from ESA's ExoMars Trace Gas Orbiter, Mars Express, and NASA's Mars Reconnaissance Orbiter modeled a former sea level in Coprates Chasma (within Valles Marineris) and identified delta-like structures matching Earth river mouths, suggesting a large ancient Martian ocean at least as big as Earth's Arctic Ocean during a period of abundant surface water; this supports the idea of a once-habitable Mars, though implications for life remain uncertain.

via Futurism|

#ancient-ocean #coprates-chasma #mars

space4 months ago•55 min saved

Ancient Martian Ocean Spanned Half the Planet, New Imagery Hints

New high-resolution orbital imagery around Mars reveals delta-like structures near Valles Marineris that researchers say mark an ancient coastline, suggesting an ocean across the northern hemisphere that may have been as large as Earth's Arctic Ocean and existed about 3.37 billion years ago, supporting the idea of a historically “blue” Mars.

via Live Science|

#ancient-ocean #arctic-ocean #mars

space4 months ago•3 min saved

Ancient Martian Seas Revealed by River Deltas in Valles Marineris

New satellite data reveal delta-like deposits in Coprates Chasma marking the shores of a northern Martian ocean about 3 billion years ago, an Arctic-sized sea that suggests Mars hosted abundant surface water and a potentially habitable past.

via ScienceAlert|

#ancient-ocean #coprates-chasma #mars

science1 year ago•2 min saved

Zhurong Rover Uncovers Ancient Ocean Clues on Mars

China's Zhurong rover, part of the Tianwen-1 mission, has discovered geological features in the Utopia Planitia region of Mars that suggest the presence of an ancient ocean shoreline, potentially rewriting the history of water on the planet. Using advanced tools like ground-penetrating radar and multispectral cameras, the rover identified formations typically associated with shorelines, supporting the hypothesis that Mars's northern lowlands were once covered by an ocean during the Hesperian period. While some scientists remain skeptical due to erosion concerns, the findings could have significant implications for understanding Mars's climate history and its potential to have supported life.

via The Daily Galaxy --Great Discoveries Channel|

#ancient-ocean #mars #mars-exploration

science1 year ago•4 min saved

Chinese Rover Uncovers Clues of Ancient Martian Ocean

A study using data from China's Zhurong rover suggests that Mars' Utopia Planitia may have been the site of an ancient ocean, with geological features indicating past water flow. The research, published in Scientific Reports, estimates the ocean existed around 3.68 billion years ago and disappeared by 3.42 billion years ago. This finding supports the theory of a Martian ocean, potentially increasing the likelihood of past microbial life on Mars, though definitive proof would require further missions.

via VOA Learning English|

#ancient-ocean #chinese-space-exploration #mars

science1 year ago•4 min saved

China's Rover Uncovers Clues of Ancient Martian Ocean

China's Zhurong rover has identified features on Mars that suggest the presence of an ancient ocean in the planet's northern hemisphere, supporting the hypothesis that Mars once had significant bodies of water. The findings, based on geological observations and remote sensing data, indicate that this ocean existed around 3.68 billion years ago. While some scientists remain skeptical, the discovery adds to the understanding of Mars' water history and its potential to have supported microbial life. Future Mars sample return missions, including China's Tianwen 3, aim to provide more definitive evidence.

via Livescience.com|

#ancient-ocean #mars #martian-geology

science1 year ago•4 min saved

China's Zhurong Rover Uncovers Evidence of Ancient Martian Ocean

China's Zhurong Mars rover has discovered features that suggest the presence of an ancient ocean in Mars' northern hemisphere, supporting the hypothesis that a large body of water once existed there billions of years ago. The rover's findings, which include crater-like cones and sediment channels, indicate a possible ancient shoreline. This discovery adds to the understanding of Mars' water history and its potential to have harbored life. Future Mars sample return missions, including China's Tianwen 3, aim to provide more definitive evidence by bringing Martian samples back to Earth for detailed analysis.

via Space.com|

#ancient-ocean #mars #martian-geology

science1 year ago•3 min saved

China's Rover Finds Evidence of Ancient Ocean on Mars

China's Zhurong rover has discovered evidence of a 3.5 billion-year-old ocean in Mars' Utopia Planitia, supporting theories of a watery past. The rover identified features like pitted cones and sedimentary deposits indicative of water activity. This finding suggests Mars' northern hemisphere once hosted an ocean that gradually receded, providing insights into the planet's early climate and geological history.

via Interesting Engineering|

#ancient-ocean #mars #science