Apollo 15 Hasselblad image from film magazine 90/PP - EVA-2<br>This is figure 7-12 of the <i>Apollo 15 Preliminary Science Report</i> (NASA SP-289, 1972), which has the following caption:<br>Incipient slope failure as indicated by slipping out of soil beneath astronauts' feet.
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2015-09-24 19:13
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