"The Snow Guardian, " Billy Barr joins Cool Science Radio . Billy lives alone on a secluded site of an abandoned silver mine shack in Gothic, Colorado, population 180. Since the winter of 1974, the 68-year-old citizen scientist has recorded daily observations of his environment: high and low temperatures; total snowfall; snow depth, water content, and density; and when animals emerge, disappear, and migrate. His data and work has resulted in being a member of the staff at Rocky Mountain