Mars had abundant volcanoes and impacts early on , and Opportunity rover scientists finally found smoking gun evidence for the ancient liquid water . NASA announced on Tuesday that ancient Mars could have supported living microbes . Jim Bell : This is quite literally a watershed moment in the history of solar system exploration . The discovery was made by NASA's Curiosity rover, which has been exploring Gale Crater for more than two years now. Bell : Curiosity rover is not done with its mission ; it may find even more interesting things .
NASA announced on Tuesday that ancient Mars could have supported living microbes . Jim Bell : This is quite literally a watershed moment in the history of solar system exploration . The discovery was made by NASA's Curiosity rover, which has been exploring Gale Crater for more than two years now. Bell : Curiosity rover is not done with its mission ; it may find even more interesting things .