His artistic eye allowed him to interpret shadow and light differently than a layperson might. To Leonard, a smudge on a crater rim was a colossal piece of engineering equipment; a ray of light was a beacon.
Leonard did not necessarily argue for "little green men." Instead, he proposed that there was evidence of immense, ancient, or possibly current industrial activity. Using photographic enhancement techniques (zoom, contrast adjustment, and collage), he identified what he believed were: Somebody Else Is On The Moon George H Leonard Pdf