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Message: <blockquote data-quote="pulasthikur" data-source="post: 19032673" data-attributes="member: 493722">Scientists have their first evidence that trickles of liquid water  play a role in sculpting mysterious dark streaks that appear during  summertime months on Mars, a finding that has implications for potential  life on Mars, as well as planning for future human expeditions. The discovery, reported Monday in the journal Nature Geoscience,  follows years of speculation and studies to learn why the faces of some  cliff walls on Mars are streaked with narrow dark slopes, some more than  300 feet long, that appear when temperatures are warm and then vanish  during the winter chill. The streaks, known as recurring slope lineae, or RSL, were first  reported in 2011 in the Martian southern highlands, but have since been  found throughout the planet's equatorial region, particularly within  deep canyons. Using data collected by NASA's Mars Reconnaissance Orbiter and a new  analysis technique, scientists were for the first time able to detect  the    telltale chemical fingerprints of hydrated salts in dozens of RSL  sites. "That implies that there was liquid water there very recently to  leave this residue of hydrated salts. It confirms that water is playing a  role in these features," Arizona State University planetary geologist  Alfred McEwen told Discovery News.<img src="/styles/default/xenforo/smilies/default/happy.gif"  class="smilie" loading="lazy" alt=":)" title="Happy    :)" data-shortname=":)" />                      source  -http://www.discovery.com/dscovrd/space/mystery-solved-water-does-flow-on-mars/?utm_source=facebook.com&utm_medium=social&utm_campaign=DiscoveryChannel</blockquote>

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