An announcement by NASA in 2015 that liquid water had been discovered on Mars was untimely, based on new analysis.
At a information convention that yr, NASA’s director of planetary science declared: “Liquid water has been discovered on Mars.”
Scientists reasoned that water should be current on the crimson planet to clarify mysterious darkish streaks that appeared to ebb and move with the seasons.
Nevertheless, whereas there may be water on Mars – present on the polar caps, floor ice, in addition to in frosts and hydrated minerals – the proof suggesting bigger volumes of liquid water is ambiguous, based on researchers from the US Geological Survey.
In a brand new paper printed in Nature Geoscience, they declare that Recurring Slope Lineae (RSL) in Eos Chasma, a deep melancholy on the planet, are “inconsistent with fashions for water sources”.
The researchers – working in cooperation with the NASA Mars Reconnaissance Orbiter Venture – discovered that the RSL had been as an alternative “equivalent to the slopes of sand dunes the place motion is brought on by dry granular flows”.
“Water virtually definitely isn’t liable for this behaviour, which might require the quantity of liquid to correspond to the size of slope obtainable, producing extra liquid on longer slopes.
“As a substitute, the 151 RSL examined by the research authors all finish on related slopes regardless of very totally different lengths.”