The Big Mars News: Flowing Water on Mars, at Least Briefly

Scientists have found what they think is evidence of extant, if brief, flowing water on Mars. In a NASA press conference on Monday, scientists claimed that images and spectra taken by the Mars Reconnaissance Orbiter's HiRISE camera show what are called Recurrent Slope Lineae, or RSLs, straight dark streaks that run down the sides of craters and canyons on Mars. These features, which are a few meters across and hundreds of meters long, change with the seasons, becoming darker and more obvious in ...