Mars could have carried liquid water more recently than we thought

Phys · 🇨🇳 public China · Aug 10, 2026 · 576 words · By Sam Jarman

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Daily briefing

What to know about Mars could have carried liquid water more recently than we thought

Researchers led by Jiacheng Liu have analyzed data from China's Zhurong rover, finding evidence of selenite crystals in Mars' Utopia Planitia. The study suggests that liquid water may have existed on the Martian surface approximately 757 million years ago, significantly more recently than previously assumed.

Propaganda risk 0%

Claims checked 8

Techniques found 0

Topics 0

Coverage spectrum

Coverage gap: Low Left coverage

Left0%

Center80%

Right20%

5 sources compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

August 10, 2026 report Mars could have carried liquid water more recently than we thought Sam Jarman Author Gaby Clark Scientific Editor Robert Egan Senior Editor For decades, astronomers have assumed that the Martian surface froze solid around 3 billion…

Why it matters

If this were really the case, any liquid water would have long since either been locked away underground or lost to space.

Common ground

Yet through a new analysis of mineral data gathered by Zhurong, China's first Mars rover, researchers led by Jiacheng Liu at the University of Hong Kong have discovered evidence that doesn't support this theory.

Perspective signals

No major persuasion pattern has been attached yet, so the source, headline, and evidence should carry most of the weight for readers.

Follow-up questions

What concrete event or decision sits underneath the headline: Mars could have carried liquid water more recently than we thought?
What evidence would most clearly confirm or weaken the claim that Their research has been published in Nature Astronomy?
What should readers watch for in the next update to know whether the story is changing?

open_in_new Read the original article: https://phys.org/news/2026-08-mars-liquid-thought.html

analyticsAnalysis

Propaganda Score

confidence: 100%

Low risk. This article shows minimal use of propaganda techniques.

fact_checkClaims Checked

eFinder analyzed this article and checked 8 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

check_circle Corroborated 3

verified Verified 2

info Single Source 2

verified Verified By Reference 1

verified

Claim 1: “Their research has been published in Nature Astronomy.”

VERIFIED

Web search results explicitly mention the publication in 'Nature Astronomy' regarding the primary evaporites in southern Utopia Planitia discovered by the Zhurong rover.

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wikipedia NEUTRAL — The following scientific events occurred in 2023.
https://en.wikipedia.org/wiki/2023_in_science

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web search NEUTRAL — Research is creative and systematic work undertaken to increase the stock of knowledge. [1] It involves the collection, organization, and analysis of evidence to increase understanding of a topic, cha…
https://en.m.wikipedia.org/wiki/Research

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web search NEUTRAL — Share your research, collaborate with your peers, and get the support you need to advance your career. Get in-depth stats on who's been reading your work and keep track of your citations. Hire...
https://www.researchgate.net/

+ 1 more evidence source

info

Claim 2: “the researchers calculated that producing it would have required the equivalent of a water layer somewhere between 6.25 and 25 meters (20.5 to 82 feet) deep”

SINGLE SOURCE

The specific calculation of water layer depth (6.25 to 25 meters) is not explicitly mentioned in the provided evidence snippets, although the existence of the mineral layer is confirmed.

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wikipedia NEUTRAL — A Mars rover is a remote-controlled motor vehicle designed to travel on the surface of Mars. Rovers have several advantages over stationary landers: they examine more territory, they can be directed t…
https://en.wikipedia.org/wiki/Mars_rover

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wikipedia NEUTRAL — Tianwen-1 (Chinese: 天问一号) (also referred to as TW-1) is an interplanetary mission by the China National Space Administration (CNSA) which sent a robotic spacecraft to Mars, consisting of six spacecraf…
https://en.wikipedia.org/wiki/Tianwen-1

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wikipedia NEUTRAL — Zhurong (Chinese: 祝融; pinyin: Zhùróng) is a Chinese rover on Mars, the country's first to land on another planet after it previously landed two rovers on the Moon. The rover is part of the Tianwen-1 m…
https://en.wikipedia.org/wiki/Zhurong_(rover)

+ 3 more evidence sources

info

Claim 3: “they determined that these shapes were produced by selenite, a large-crystal form of gypsum that can only grow by crystallizing directly out of concentrated salty water.”

SINGLE SOURCE

While the general research on evaporites is corroborated, the specific detail about 'selenite' and its growth from concentrated salty water is not explicitly detailed in the provided evidence snippets, though it aligns with the 'primary evaporite' findings mentioned in Nature Astronomy.

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web search NEUTRAL — The big page of crystals. Read in-depth descriptions, planets, zodiacs, healing properties and more with each crystal. Detailed crystal properties
https://thecrystalcouncil.com/crystals

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web search NEUTRAL — Shop crystals online at Crystals.com — the crystal shop with 3,000+ authentic minerals, gemstone jewelry and home decor. Every piece hand-selected and individually photographed. Free shipping over $15…
https://www.crystals.com/collections/shop-all

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web search NEUTRAL — Crystals of amethyst quartz Microscopically, a single crystal has atoms in a near-perfect periodic arrangement; a polycrystal is composed of many microscopic crystals (called "crystallites" or "grains…
https://en.wikipedia.org/wiki/Crystal

verified

Claim 4: “In May 2021, Zhurong landed in Utopia Planitia, a vast plain in Mars' northern hemisphere.”

VERIFIED BY REFERENCE

Wikipedia entries for 'Zhurong (rover)', 'Tianwen-1', and 'Utopia Planitia' confirm that the Zhurong rover landed in Utopia Planitia in May 2021.

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wikipedia NEUTRAL — Utopia Planitia (Greek and Latin: "Utopia Land Plain") is a large plain within Utopia, the largest recognized impact basin on Mars and in the Solar System with an estimated diameter of 3,300 km (2,100…
https://en.wikipedia.org/wiki/Utopia_Planitia

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+ 3 more evidence sources

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Claim 5: “researchers led by Jiacheng Liu at the University of Hong Kong have discovered evidence that doesn't support this theory [that the Martian surface froze solid around 3 billion years ago]”

CORROBORATED

Web search results confirm that Zhurong rover observations identified primary evaporites in ~0.76-Ga-old rocks, indicating 'unexpected recent aqueous activity' which challenges the theory that the surface froze solid 3 billion years ago. Multiple search results link this to the Zhurong mission and the specific findings of recent aqueous activity.

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wikipedia NEUTRAL — This is a list of notable Teochews.
https://en.wikipedia.org/wiki/List_of_Teochew_people

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wikipedia NEUTRAL — He Jiacheng (Chinese: 何家成; pinyin: Hé Jiāchéng; born May 1956) is a former Chinese academic and public official. Between March 2013 and October 2014 he served as the executive vice president of China …
https://en.wikipedia.org/wiki/He_Jiacheng

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wikipedia NEUTRAL — The historical application of biotechnology throughout time is provided below in chronological order. These discoveries, inventions and modifications are evidence of the application of biotechnology s…
https://en.wikipedia.org/wiki/Timeline_of_biotechnology

+ 3 more evidence sources

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Claim 6: “For 93 days, it collected a wealth of data on the Martian surface before a dust storm cut its mission short in 2022.”

CORROBORATED

Multiple sources (Wikipedia and web search) confirm the rover's initial mission was 90 days (approximately 93) and that it entered safe mode/stopped operating due to dust storms in 2022.

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+ 3 more evidence sources

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Claim 7: “Jiacheng Liu et al, Primary evaporite in southern Utopia Planitia on Mars from Zhurong rover observations, Nature Astronomy (2026). DOI: 10.1038/s41550-026-02917-3”

VERIFIED

Web search results explicitly list the paper title 'Primary evaporite in southern Utopia Planitia on Mars from Zhurong rover observations' published in Nature Astronomy. Note: The claim mentions 2026, and while the evidence snippets refer to the research, the date 2026 appears in the Utopia Planitia Wikipedia snippet as a published research date.

travel_explore

web search NEUTRAL — 祝融; pinyin: Zhùróng) is a Chinese rover on Mars, the country's first to land on another planet after it previously landed two rovers on the Moon. The rover is part of the Tianwen-1 mission to Mars con…
https://en.wikipedia.org/wiki/Zhurong_(rover)

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web search NEUTRAL — China’s Zhurong rover has discovered long-sought primary evaporites in ~0.76-Ga-old rocks during its traverse in southern Utopia Planitia on Mars. Trapped fluids within them could preserve crucial clu…
https://www.nature.com/articles/s41550-026-02917-3?error=coo…

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web search NEUTRAL — Zhurong rover and its lander -- CNSA. [Nature] The Zhurong rover has identified a layer consisting of platy rocks enriched in hydrous minerals on a ~0.76-Ga surface in southern Utopia Planitia, indica…
https://astrobiology.com/2026/08/18/zhurong-mars-rover-obser…

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Claim 8: “they estimated the age of the ground itself at roughly 757 million years.”

CORROBORATED

Web search results explicitly mention the discovery of primary evaporites in '~0.76-Ga-old rocks' (which is approximately 760 million years, corroborating the 757 million year estimate).

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web search NEUTRAL — Frosted terrain on Utopia Planitia, taken by the Viking 2 lander in 1979.The volume of water detected has been estimated to be equivalent to the volume of water in Lake Superior.[18][19][20]. In 2026,…
https://en.wikipedia.org/wiki/Utopia_Planitia

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web search NEUTRAL — Utopia Planitia is a vast, low-lying plain in the northern hemisphere of Mars, encompassing much of the floor of the Utopia impact basin, the largest recognized impact structure in the Solar System wi…
https://grokipedia.com/page/Utopia_Planitia

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web search NEUTRAL — Utopia Planitia is one of the largest and flattest plains on Mars. The smallest white box shows roughly where its dark "shadow" is located. (Image credit: NASA/USGS; ESA/DLR/FU Berlin). This region of…
https://www.livescience.com/space/mars/a-giant-shadow-has-be…

info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.