article_snippet: Both uncovered geologic signs of ancient water.
article_snippet: Both uncovered geologic signs of ancient water.
article_snippet: Opportunity's original three-month prime mission in 2004 yielded evidence of environments with liquid water soaking the ground and flowing on planet's surface.
article_snippet: Since 2011, examinations of Endeavour's rim have provided information about ancient wet conditions less acidic, and more favourable for microbial life, than the environment that left clues found earlier in This mission.
article_snippet: Opportunity's original three-month prime mission in 2004 yielded evidence of environments with liquid water soaking the ground and flowing on planet's surface.
article_snippet: Since 2011, examinations of Endeavour's rim have provided information about ancient wet conditions less acidic, and more favourable for microbial life, than the environment that left clues found earlier in Opportunity's original three-month prime mission in 2004.