Photographer Sally Mann and Larry Mann, in her home gallery in Lexington, Va., have been married for 40 years. Melissa Block/NPR hide caption

itoggle caption Melissa Block/NPR

Daisy Mae, a miniature Vietnamese potbellied pig, lounges on a couch in West St. Paul, Minn. Vincent J. Musi/National Geographic hide caption

itoggle caption Vincent J. Musi/National Geographic