A rocky outcrop on Mars has sent a shot of excitement through the scientific community with the evidence it provides of an ancient riverbed -- Martian "water transport" -- according to NASA.
NASA's Curiosity rover has sent back pictures of a section of the Martian surface called Link, an outcrop of rocks whose surface is not coated in the ruddy dust of Mars but is exposed and clean, the space agency says.
As the Los Angeles Times' Science Now reported Thursday, the combination of sandy rock and large pebbles tells a story of an ancient river, with rocks that traveled far, bumping into -- and smoothing -- one another out. It was water, not wind, that created that rocky scenario on Mars, scientists said.
Link, says NASA, shows rock formed by water deposits, made up of smaller, rounded rocks cemented together. "Water transport is the only process capable of producing the rounded shapes of clasts [gravel fragments] this size," according to NASA.