Geek Out Earth or Mars? By opendna April 11, 2005 Leave a comment Earth or Mars ? Post navigation Previous post: NASA Warns of “Semian Threat”First GIS ApplicationNext post: Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name Email Website To respond on your own website, enter the URL of your response which should contain a link to this post's permalink URL. Your response will then appear (possibly after moderation) on this page. Want to update or remove your response? Update or delete your post and re-enter your post's URL again. (Learn More)