Greenhouse clue to water on Mars
24323
A new hypothesis could explain how the climate of early Mars became warm enough to support oceans.
474106
Mars may still house large reservoirs of the water and carbon dioxide that once formed the planets ancient atmosphere, new research suggests.
260272
A probable active glacier is identified on the surface of Mars for the first time.
742310
NASA's Spirit and Opportunity have been exploring Mars about three times as long as originally scheduled. The more they look, the more evidence of past liquid water on Mars these robots discover.
770282
Summary - (Oct 8, 2004) Now operating three times longer than originally expected, NASA&#39;s Mars Exploration Rovers are still turning up fresh evidence that liquid water once flowed on Mars.
534691
An orbiting spacecraft has sent back new evidence for the presence of water on Mars.
738317
Scientists find water on a distant planet. Someday, maybe they'll find life
366940
Ten months after NASA&#39;s twin rovers landed on Mars, scientists reported Thursday that both robotic vehicles were still navigating their rock- studded landscapes with all instruments operating, and both were discovering fresh evidence that water must have
7602
Pictures of Martian gullies taken years apart suggest that liquid water still flows on the planetÂs surface.
211347
The twin rovers on Mars - now reviving having survived the freezing depths of Martian winter - have found new signs that water was once plentiful on Mars.
316670
The final results of the Rover research will be reported next year, but a growing body of evidence shows that Mars had a great deal of water several billion years ago, about the same time life was emerging on Earth.
185127
WATER ice may have been found near the Martian equator on the solar systemâs biggest volcano, scientists revealed yesterday. High-resolution pictures taken by the Mars Express spacecraft suggest the presence
67974
NASA&#39;s older Martian robotic rover, Spirit, has found evidence that underground water changed a major rock formation called the Columbia Hills, scientists said Thursday.
327864
After months of crossing a vast Martian crater floor and zigzagging up low-slung hills, NASA&#39;s Spirit rover has spotted its first hint that water once coursed across the now-desert-like region, scientists said Wednesday.
230382
Before its death, Mars Global Surveyor captures images of  water flowing on the surface of the red planet. In Gear Factor.
214100
More evidence of past water on Mars may help answer the questions &quot;How wet?&quot; and &quot;How long?&quot; At a news conference here at the fall meeting of the American Geophysical
284266
Images taken by NASA's Mars Global  Surveyor spacecraft suggest the presence of liquid water on the  Martian surface, a tantalizing find for scientists wondering if  the Red Planet ever has harbored life.