UKAstroNut's video: NASA find water on Mars

On the 28th of September 2015 NASA announced for the first time direct evidence of water on Mars. But with sub zero temperatures on the red planet, how can liquid water exist here? How did NASA find evidence for it? All will be explained! Twitter: https://twitter.com/UKAstroNut Facebook: https://www.facebook.com/UKAstroNut Website: http://www.ukastronut.co.uk Blog: http://ukastronutblog.blogspot.co.uk/ Image credits: "ESP 039793 1385channeldetails" by Jim Secosky modified NASA image. - http://hirise.lpl.arizona.edu/ESP_039793_1385. Licensed under Public Domain via Commons - https://commons.wikimedia.org/wiki/File:ESP_039793_1385channeldetails.jpg #/media/File:ESP_039793_1385channeldetails.jpg "AncientMars" by Ittiz - Own work. Licensed under CC BY-SA 3.0 via Commons - https://commons.wikimedia.org/wiki/File:AncientMars.jpg #/media/File:AncientMars.jpg "Mars Reconnaissance Orbiter" by NASA/JPL/Corby Waste - https://solarsystem.nasa.gov/multimedia/display.cfm?Category=Spacecraft&IM_ID=2206 (image link). Licensed under Public Domain via Commons - https://commons.wikimedia.org/wiki/File:Mars_Reconnaissance_Orbiter.jpg #/media/File:Mars_Reconnaissance_Orbiter.jpg NASA European Space Agency