Mars theory gets dusted: Streaks may be sand, not water

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Mars theory gets dusted: Streaks may be sand, not water

This image provided by NASA shows the inner slope of a Martian crater which has several of the seasonal dark streaks called “recurrent slope lineae,” or RSL, that a November 2017 report interprets as granular flows, rather than darkening due to flowing water. Arizona scientists said Monday, Nov. 20, 2017, that these lines appear more like dry, steep flows of sand, rather than water trickling downhill, at or near the surface.

Mars theory gets dusted: Streaks may be sand, not water

This image provided by NASA shows the inner slope of a Martian crater which has several of the seasonal dark streaks called “recurrent slope lineae,” or RSL, that a November 2017 report interprets as granular flows, rather than darkening due to flowing water. Arizona scientists said Monday, Nov. 20, 2017, that these lines appear more like dry, steep flows of sand, rather than water trickling downhill, at or near the surface.
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