Flowing water on Mars appears likely but hard to prove: Studies examine puzzling summertime streaks

Martian experts have known since 2011 that mysterious, possibly water-related streaks appear and disappear on the planet’s surface. These features were given the descriptive name of recurring slope lineae (RSL) because of their shape, annual reappearance and occurrence generally on steep slopes such as crater walls. Researchers have been taking a closer look at this phenomenon, searching for minerals that RSL might leave in their wake, to try to understand the nature of these features: water-related or not?

from Space & Time News — ScienceDaily http://ift.tt/1eR2etJ

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