Say it Ain't So: Mars' Ancient Seas Were Dead?

Time for a little reality check. It seems like almost every day there's a piece of news about how "research suggests there were once oceans floating in the vacuum of space!" or "life could have once existed at the center of the Sun!" You know, we all get a little over-excited sometimes. Well, geochemist Nicholas Tosca of… » 5/30/08 9:30am 5/30/08 9:30am

The Triumphant Journeys of Martian Robots

Since 1960 we've been attempting to explore the red planet, and along the way there have been countless failures and lost spacecraft that attest to just how hard it is to fly those 35 million miles from here to there. However, there have also been success stories, like the twin rovers Opportunity and Spirit, who have… » 3/25/08 3:11pm 3/25/08 3:11pm