article_snippet: The discovery is the latest feather in the cap for the theory that while Mars is barren and dry now, The discovery was once habitable.
article_snippet: Findings were made by Curiosity's (shown)
article_snippet: Findings were published in the journal Proceedings of the National Academy of Sciences.
article_snippet: Writing in the journal Nature Geoscience, Carnegie Institution of Washington
article_snippet: The discoveries were made at areas of Mars known as John Klein and Cumberland.
article_snippet: down - tells us there must be some relatively localised source,' said Sushil Atreya of the University of Michigan, Ann Arbor, and Curiosity rover science team, at the time. '
article_snippet: There are many possible sources, biological or non-biological, such as interaction of water and rock.'
article_snippet: But none of these previous readings are as extraordinary as the sudden 'venting' measured at Gale Crater, where evidence suggests water once flowed billions of years ago.
article_snippet: Curiosity landed in the 96 mile-wide (154km) crater in August 2012 and has been exploring the region ever since.
article_snippet: Since it landed, conclusive evidence has been found that Mars once had water on Mars surface, and now scientists are hoping to provide an answer once and for all to the greatest question:
article_snippet: Was there, or is there still, life on Mars as well?
highlights_snippet: Increases evidence that the red planet was once habitable in the red planet past .