The photography exhibit Cole Caswell: Patterns of Aggression presents Caswell’s work in a wide variety of styles (landscape, still life, abstract) and media (from tintypes to digital), united by the artist’s interest in technology and other means of survival. It opened last month at the Maine Museum of Photographic Arts (Glickman Family Library, fifth floor, USM’s Portland campus) and continues through May 19. Open today 7:45 a.m. to 11 p.m. 780-4270. usm.maine.edu.