Planetary Society logo
  • “Exploration is in our nature.” - Carl Sagan
Author

All

Keyword

All

Stories, updates, insights, and original analysis from The Planetary Society. 

Kasei Valles, Mars, from Mars Express

Mars Used to Have Water, But We Can't Explain How

Although we have acquired compelling evidence of flowing liquid water on early Mars, the fundamental question about how water could be stable under Martian atmospheric conditions remains unsolved.