Water
I’ll have to read more about this later.
h/t Michael Habib
Originally shared by NASA
Liquid water flows on present-day Mars! Researchers using our Mars Reconnaissance Orbiter detected signatures of hydrated minerals on slopes where mysterious dark streaks are seen on the Red Planet. Scientists say it’s likely a shallow subsurface flow, with enough water wicking to the surface to explain the darkening. This is a significant science discovery on our quest to send humans on a #JourneyToMars. Details: http://go.nasa.gov/1Lh2IvA