NASA's Curiosity rover has revealed how the ground under its wheels was once 'perfect' for life.
The rover is climbing a layered Martian mountain, and has found the ingredients for a 'stew of life', researchers said.
New NASA analysis revealed today points to a 'evidence of how ancient lakes and wet underground environments changed, billions of years ago, creating more diverse chemical environments that affected their favorability for microbial life.'
'There is so much variability in the composition at different elevations, we've hit a jackpot,' said John Grotzinger, of Caltech in Pasadena, California.
Hematite, clay minerals and boron are among the ingredients found to be more abundant in layers farther uphill, compared with lower, older layers examined earlier in the mission.
'Variations in these minerals and elements indicate a dynamic system,' Grotzinger said.