Did you hear? Liquid water flows on present-day Mars. Our @Tumblr blog: http://t.co/MHj2dpfhhX #MarsAnnouncement pic.twitter.com/SgZIyGv6Bt
— NASA (@NASA) septiembre 28, 2015
Y la cruz.....
Risk of microbial contamination could prevent humans and even robots from visiting the most promising parts of Mars http://t.co/slxPKoEcJX
— Scientific American (@sciam) septiembre 28, 2015
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