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Martian water, will he go back to bubbling like a time? According to NASA, some seasonal dark streaks on the surface of the planet suggest that water can flow again today.

Martian water, will he go back to bubbling like a time?

The steep slopes of the Martian Coprates Chasma valley marked by dark streaks formed perhaps by salt water. Dark streaks appearing on the surface of Mars would be, according to NASA, the proof of the presence of salty liquid water. The new observations, described in Nature Geoscience, would testify that water still flows, at least for short periods, on Mars. In addition, they explain the apparent seasonal occurrence and disappearance of those dark lines, called recurring slope lineae (RSL). These lines, long, dark and fleeting, have been identified for the first time in 2010. They have been discovered by observing the images taken by the HiRISE camera mounted on the Mars Reconnaissance Orbiter for NASA. At the time, he had no idea when that observation could be important for a few years.

Martian water, will he go back to bubbling like a time?

Over the past five years now, researchers have repeatedly pointed HiRISE on the slopes and on the Martian craters. Thus they noticed that the dark streaks appeared, stretched, then vanished during the warmer seasons; also heavily influenced by their appearance in the usual places, near the equator, and they seemed to flow from the steep slopes and the walls of the craters. These formations could be explained by the presence of water flowing along these surfaces, darkening; the only problem was that, in the absence of the possibility to detect the presence of water, it remained only a hypothesis. The novelty is that now scientists have identified the presence of hydrated salts – perchlorates – in four different areas in which they appear streaks. The presence of hydrated salts in these points means that the streaks are formed because of contemporary water: We are not saying to have found water. We found hydrated salts.

Martian water, will he go back to bubbling like a time?

One of the questions that concern that water is: where it comes from? One possibility is that the source is an aquifer, or melting ice below the surface. A scenario in which Mars “would sweat” salt water from her pores, which then would flow along the walls with warm up the planet. The water, however, may also have an origin Atmospheric: in this case, the salts in the surface absorb water vapor from the atmosphere of Mars. If the moisture present in the Martian atmosphere is high enough, the perchlorates would absorb, and the salts will melt resulting in a liquid solution. Whatever its origin, the presence of water on Mars is not new. The entire surface of Mars was carved by water billions of years ago, when the planet was warmer and wetter. The various probes undertaken to explore the planet’s surface continue to churn out information which shows that water was once widespread across the planet. And already in 2012, the Curiosity rover has discovered direct evidence of the fact that, in the past, flowed on Mars liquid water.

Martian water, will he go back to bubbling like a time?

But to date, no evidence of the presence of liquid water today. What this might mean for the search for extraterrestrial life, however, it is yet to be seen.

Martian water, will he go back to bubbling like a time?

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To open the video click on the image, good view from your Alessandro Brizzi.



Martian water, will he go back to bubbling like a time