The analysis of the stone fragment detected by Opportunity shows the possibility of ever having water with a neutral pH on the red planet.
The Opportunity exploration ship has just officially broken the record of the passage of a planet in the space that has existed for more than 40 years by Apollo 17.
'Mars is as cold as hell', singer Elton John lifted the forecast of such a Martian climate in the Rocket Man song released in 1972 - four years before the Viking 2 landing chamber.
Well-known NASA researcher Steve Squyres has proposed the idea of bringing a submarine robot to explore the ice giant on the moon of Jupiter's Europa to find life.