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Home NASA

Curiosity rover discovers Mars as soon as had ‘proper situations’ for all times

October 25, 2023
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Curiosity rover discovers Mars as soon as had ‘proper situations’ for all times
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Because of a mix of pictures from NASA’s Curiosity rover, scans of sedimentary rock beneath the Gulf of Mexico on Earth and pc simulations, geologists have recognized the traditional, eroded remnants of rivers in plenty of craters on Mars.

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A staff of researchers analyzing knowledge collected by NASA’s Curiosity rover at Gale crater, a big impression basin on the Martian floor, found additional proof that rivers as soon as flowed throughout the Crimson Planet, maybe extra widespread than was beforehand thought. “We’re discovering proof that Mars was possible a planet of rivers,” mentioned geoscientist Benjamin Cardenas of Penn State College and lead writer of the analysis in a statement.

On Earth, rivers are essential for chemical, nutrient and sediment cycles that every one have a optimistic impression on life. The invention of additional proof for historical rivers on Mars, due to this fact, might be an essential improvement within the seek for indicators of life on the Crimson Planet.

“Our analysis signifies that Mars might have had way more rivers than beforehand believed, which actually paints a extra optimistic view of historical life on Mars,” mentioned Cardenas. “It provides a imaginative and prescient of Mars the place many of the planet as soon as had the best situation for all times.”

Associated: Excellent news for all times: Mars rivers flowed for lengthy stretches way back

The precise landforms recognized in Curiosity rover knowledge, referred to as bench-and-nose options, are discovered inside quite a few small craters, however till now had not been acknowledged as being deposits shaped by working water.

Proof for rivers on Mars has been recognized because the first spacecraft to orbit Mars, Mariner 9, imaged dried-up river channels and floodplains on the crimson planet’s floor. The assorted Mars rovers have additionally discovered mineralogical proof within the type of sulfur-containing compounds equivalent to jarosite, which kind in water. The rovers and orbiters have additionally recognized ridges shaped by sediment in river channels billions of years outdated.

Nevertheless, the identification of the bench-and-nose landforms means that rivers have been much more widespread than thought. They’re an alternating mixture of steep slopes and shallow ‘benches’, and shortened ridges referred to as ‘noses’. They kind when sedimentary materials laid down in channels by rivers are subsequently eroded in a preferential route, probably by prevailing winds.

bench-shaped rocks on the red, sandy surface of mars

Examples of bench-and-nose landforms imaged by the Curiosity rover.  (Picture credit score: NASA/Caltech–JPL/MSSS)

Suspecting their watery origin, Cardenas and Kaitlyn Stacey, additionally of Penn State, skilled their pc mannequin on Curiosity’s pictures of bench-and-nose landforms inside craters and three-dimensional scans of layers of sedimentary bedrock on the ocean ground beneath the Gulf of Mexico taken by oil firms 25 years in the past. 

The pc mannequin was then capable of simulate the erosion of sediment left by rivers to kind the bench-and-nose landforms.

Curiosity had beforehand ascertained that the 154-km-wide (96 miles) Gale crater, which the rover is exploring, was full of liquid water. The invention that the bench-and-nose landforms have been produced by rivers now provides some indication of the construction of that water-mass inside Gale crater.

The findings are revealed in Geophysical Research Letters.



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