![NASA Makes A Major Mars Announcement](http://townsquare.media/site/48/files/2015/09/81949605.jpg?w=980&q=75)
NASA Makes A Major Mars Announcement
NASA scientists are reporting definitive signs of liquid water on Mars' present-day surface.
"This, I think, gives a focus of where we should look more closely," said Alfred S. McEwen, professor of planetary geology at the University of Arizona and investigator of high-resolution images taken on NASA's Mars Reconnaissance Orbiter.
Mars is known to have had rivers, lakes, and perhaps an ocean a few billion years ago. Moisture on Mars' surface today, however, has been modest. Scientists have known for a long time that water still remains on Mars, but in frozen form. There have also been signs of liquid water, but nothing was proven until recently.
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