Artist Arlene Love’s sculpture Face Fragment at the Monell Chemical Senses Center (@monellcenter) in Philadelphia. Caroline Tompkins (@cahlinetompkins), who photographed the science of smell feature in this month’s issue of Smithsonian, ranks smell as her second favorite sense, following sight. She has an exhibition at @1014.gallery in London opening October 27 titled Bedfellow. Photo by @cahlinetompkins on assignment for Smithsonian Magazine.