The apparently fictitious “Institute for the Promotion of the Less than One Millimeter” offers a visual smorgasbord of microbiological images. Wim van Egmond describes his “Micropolitan Museum” as portraits of what he can scoop up with a pipette or tweezers. He’s got marine and freshwater collections, a botanical garden, and an insectarium. The latter two aren’t truly invisible—although the structural details that van Egmond captures would be missed by the naked eye.