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#planet
#science
#fault
#tectonics
#valles marineris
#geology
#lpsc2014
#crism
#the earth story
#lpsc2014
#science
#telescope
#desert
#nature
#landscape
#the earth story
#apollo 17
#lpsc2014
#science
#geology
#harrison schmitt
#caltech
#harvard
#astronaut
#apollo
#the earth story
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