Apollo 11 Lunar Module Pilot Buzz Aldrin’s bootprint. Aldrin photographed this bootprint about an hour into their lunar extra-vehicular activity on July 20, 1969, as part of investigations into the soil mechanics of the lunar surface.

Apollo 11 Lunar Module Pilot Buzz Aldrin’s bootprint. Aldrin photographed this bootprint about an hour into their lunar extra-vehicular activity on July 20, 1969, as part of investigations into the soil mechanics of the lunar surface.

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