News Space Mars’ history is a fluid situation New analysis challenges watery, warm picture of planet's surface Share this:FacebookTwitterPocketRedditPrintEmail By Nadia Drake November 2, 2011 at 6:15 pm This article is only available to Science News subscribers. Subscribers, enter your e-mail address to access our archives. Client key* E-mail* Log in Not a subscriber? Science News is a nonprofit. Support us by subscribing now. Subscribe