This site contains information about the possibility of liquid water on Mars in the recent past. In March 2004, two robotic rovers from NASA delivered clear evidence that liquid water existed on the surface of Mars at some point in the its past. But could liquid water still exist on Mars today? The likelihood would seem to be impossibly low. Yet a series of satellite photographs taken by NASA's Mars Global Surveyor, which has been mapping Mars since 1999, raise the exciting possibility that liquid water may have existed there very recently. The photos reveal gullies on Mars seemingly identical to landforms that, on Earth, are created by flowing water. This site has links to four photographs, four other essays, a featured video, a glossary, and sites for more information.
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