An orbiter glitch may mean some signs of liquid water on Mars aren’t real

A new analysis of images once thought to show hints of saltwater suggests they actually don’t

a black and white image of the Horowitz crater

HIGH AND DRY  Ephemeral dark streaks on Martian craters, like the ones in this Mars Reconnaissance Orbiter image of Horowitz crater, were thought to be signs of salty water. A new analysis suggests they’re not.

Univ. of Arizona, JPL-Caltech/NASA

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