You don't expect to find art exhibitions at London's Imperial War Museum, but its latest show explores the modern art of military disguise, starting during World War I with a group of second-rate French cubists. (Were there ever any first-rate cubists?) Camouflage opened on Friday and continues until 18 November 2007. "The first major exhibition to explore the impact of camouflage on modern warfare and its adoption into popular culture." From battlefield to catwalk, from soldiers to flouncing models, from Cubism to contemporary art: camouflage. Why did it take us so long to appreciate the value of what Nature had been telling us long before we swung down from the trees?