By Julie Kent. Published on 11/26/2012 - 10:23am
While NASA is busy working on a strategy that would see bits of rock and soil from the Martian surface returned here to Earth, some scientists say that the most intriguing samples from the Red Planet lie in underground caverns.
NASA's next move on Mars is geared towards mounting a sample-return mission, which is widely believed to be the best way to look for signs of life there. These signs are more likely to be found in material pulled from the planet's subsurface, so some researchers are hoping that the space agency's first sample-return mission will not be its last.
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