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NASA’s Curiosity Mars rover discovers proof of ripples from an historical Crimson Planet lake (pictures)

February 20, 2025
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NASA’s Curiosity Mars rover discovers proof of ripples from an historical Crimson Planet lake (pictures)
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At present, we all know of Mars as a chilly, dry desert, with patches of subterranean ice and ice caps at its poles. Billions of years in the past, nonetheless, liquid water flowed freely throughout the planet. And, whereas NASA’s varied Mars rovers have uncovered indicators that such water as soon as existed on Mars, there’s maybe no higher proof of an ice-free, shallow lake than these two units of ripples in Martian rock.

In November 2022, NASA’s Curiosity rover imaged the Amapari Marker Band within the foothills of Mount Sharp, situated in Gale Crater. Inside the marker band itself — a skinny, darkish layer of rock — scientists acknowledged wave ripples in what would’ve as soon as been a sandy shoreline. Just a few weeks later, Curiosity imaged one other set of wave ripples within the close by Prow outcrop, which might have been on the lake mattress.

The ripples are thought to have fashioned some 3.7 billion years in the past, throughout a interval when Mars was considered drying up. However their presence signifies that Mars’ local weather would have been pretty heat — and its floor moist — on the time. “The form of the ripples might solely have been fashioned below water that was open to the ambiance and acted upon by wind,” California Institute of Know-how (Caltech) postdoctoral researcher Caire Mondro mentioned in a statement. And if the water was blown by wind, meaning it was not coated in ice, as some scientists have hypothesized.

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From these ripples, researchers not solely decided the existence of a shallow lake right here, but in addition its depth. Utilizing a pc mannequin, Caltech professor of geology Michael Lamb discovered that the scale and spacing of the ripples point out the lake was lower than six ft (two meters) deep.

A black and white image of a section of mars with ripple patterns.

These ripples have been imaged by Curiosity on Sol 3684 (Dec. 16, 2022). (Picture credit score: NASA/JPL-Caltech/MSSS)

“Earlier missions, starting with Alternative in 2004, found ripples fashioned by water flowing throughout the floor of historical Mars, but it surely was unsure if that water ever pooled to type lakes or shallow seas,” John Grotzinger, the former project scientist for Curiosity’s mission, mentioned within the assertion. “The Curiosity rover found proof for long-lived historical lakes in 2014, and now 10 years later Curiosity has found historical lakes that have been freed from ice, providing an necessary perception into the planet’s early local weather.”

A paper on the invention was printed within the journal Science Advances on Jan. 15.

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