NASA researchers, examining photographs of Mars' surface taken by the Mars Reconnaissance Orbitor, discovered some large landslides. Originally, the Orbitor was snapping photographs to track seasonal changes, but the landslides can reveal information about the planet's water cycle.
http://news.yahoo.com/s/afp/20080304/ts_afp/usspacenasamarsavalanchetechnology_080304162115;_ylt=AoNVOY7tIHostMkqa5MNpdblmlUA
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