News Archives Astrobiology Science News 22 December 2007 By Keith Cowing December 22, 2007 How Mars could have been warm and wet but limestone-free, MIT Mars rovers find new evidence of ‘habitable niche’; perilous third winter approaches, Cornell Keith Cowing SpaceRef co-founder, Explorers Club Fellow, ex-NASA, Away Teams, Journalist, Space & Astrobiology, Lapsed climber. Follow on Twitter
