Ultraviolet Bath, Russia. Photograph by Joe McNally. Make-believe summer lasts for a minute or two as kindergarten children in sunless Lovozero bathe in ultraviolet light. Brief exposure to UV radiation provides the children with vitamin D, normally supplied by sunlight. The “sunshine vitamin” strengthens young bones.

Ultraviolet Bath, Russia.

Photograph by Joe McNally.

Make-believe summer lasts for a minute or two as kindergarten children in sunless Lovozero bathe in ultraviolet light. Brief exposure to UV radiation provides the children with vitamin D, normally supplied by sunlight. The “sunshine vitamin” strengthens young bones.