NASA scientists announced Tuesday that they believe the Mars rover Opportunity has found what used to be a briny pool of standing water at least 2 inches deep.
NASA's robotic rover, fully recovered from computer problems that plagued it for more than two weeks, drilled into a Martian rock over the weekend in search of evidence that water once flowed on the arid planet.
NASA's rover Spirit has failed to transmit data from Mars for more than 24 hours in what mission scientists thought at first was a weather-related interruption but now believe could be a serious hardware or software problem.
Nearly two weeks after its arrival on Mars, the robotic rover Spirit rolled off its landing platform Thursday for its first trip onto Martian soil.
The robotic explorer Spirit successfully landed on Mars Saturday night and immediately began transmitting images of its surroundings, a long-dried up lake bed where scientists are seeking evidence that life once existed on the red planet.
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