NASA research has revealed that there was liquid water on Mars as recently as 2–2.5 billion years ago.


Mars today is marked by its endless red desert plains. But it was not always like that. There was water and it flowed on its surface longer than previously estimated, new research by NASA says. The Red Planet rippled with rivers and ponds just like Earth billions of years ago, providing a potential habitat for microbial life. That water, however, evaporated as the planet's atmosphere thinned over time. It was believed that the water evaporated about three billion years ago. But two scientists studying data, which Mars Reconnaissance Orbiter (MRO) accumulated over the last 15 years, have found evidence that changes the timeline significantly.