Landed on ice square on planet. Explored. Ice square melted. Never able to get back to ship. Walked around and around planet for days. :(
Probably counts as one of the stupider 'deaths'. Although nobody actually died as it's an earth like planet.
Not sure if this counts as a bug, or just bad luck. :P
[EDIT]
Huh, apparently if you save the game, then reload,the climate resets? Or something? Everything froze over - escaped.