- Study Reveals Young Mars Was A Wet World
- NASA - The Mars Exploration Program
- Scientists have discovered that Mars once had saltwater oceans
- BBC News: Methane on Mars could signal life
- BBC News: Ammonia on Mars could mean life
- Scientist says that life on Mars is likely today
- Ancient salty sea on Mars wins as the most important scientific achievement of 2004 - Journal Science
- Mars meteor found on Earth provides evidence that suggests microbial life once existed on Mars
- Scientific American Magazine (November 2005 Issue) Did Life Come from Another World?
- Audio interview about "Dark Dune Spots"