Editing Mars Reconnaissance Orbiter (section)

=== Recurring slope lineae ===
[[File:Seasonal Changes in Dark Marks on an Equatorial Martian Slope.gif|thumb|Images from HiRISE showing the appearance of dark marks on the floor of [[Valles Marineris]]. Images taken at various times in the year.]]{{See also|Seasonal flows on warm Martian slopes}}
On August 4, 2011 (sol {{age in sols|2005|08|12|2011|08|04}}), NASA announced that ''MRO'' had detected [[Dark slope streak|dark streaks on slopes]], known as ''recurring slope lineae'' caused by what appeared to be [[Seasonal flows on warm Martian slopes|flowing salty water]] on the surface or subsurface of Mars.<ref name="scienceblog" /> On September 28, 2015, this finding was [[Portal:Current events/2015 September 28|confirmed]] at a special NASA news conference.<ref>{{cite news |last=Chang |first=Kenneth |date=September 28, 2015 |title=NASA Says Signs of Liquid Water Flowing on Mars |work=The New York Times |url=https://www.nytimes.com/2015/09/29/science/space/mars-life-liquid-water.html?_r=0 |url-status=live |url-access=subscription |access-date=September 28, 2015 |archive-url=https://web.archive.org/web/20150930054305/http://www.nytimes.com/2015/09/29/science/space/mars-life-liquid-water.html?_r=0 |archive-date=September 30, 2015 |quote=Christopher P. McKay, an astrobiologist at NASA's Ames Research Center, does not think the R.S.L.s are a very promising place to look. For the water to be liquid, it must be so salty that nothing could live there, he said. "The short answer for habitability is it means nothing," he said.}}</ref><ref name="Ojha NG2015">{{cite journal |last1=Ojha |first1=Lujendra |last2=Wilhelm |first2=Mary Beth |last3=Murchie |first3=Scott L. |last4=McEwen |first4=Alfred S. |display-authors=etal |date=September 28, 2015 |title=Spectral evidence for hydrated salts in recurring slope lineae on Mars |journal=Nature Geoscience |volume=8 |issue=11 |pages=829–832 |bibcode=2015NatGe...8..829O |doi=10.1038/ngeo2546}}</ref> In 2017, however, further research suggested that the dark streaks were created by grains of sand and dust slipping down slopes, and not water darkening the ground.<ref>{{Cite web |last=Greicius |first=Tony |date=November 20, 2017 |title=Recurring Martian Streaks: Flowing Sand, Not Water? |url=https://www.nasa.gov/feature/jpl/recurring-martian-streaks-flowing-sand-not-water |access-date=July 19, 2023 |website=[[NASA]] |archive-date=December 8, 2021 |archive-url=https://web.archive.org/web/20211208070556/https://www.nasa.gov/feature/jpl/recurring-martian-streaks-flowing-sand-not-water |url-status=live }}</ref>

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