elephants are inspired by Gian Lorenzo Bernini's sculpture base in Rome of an elephant carrying an ancient obelisk. Science Dalí's life-long interest in science and mathematics was often reflected in his work. His soft watches have been interpreted as references to Einstein's theory of the relativity of time and space. Images of atomic particles appeared in his work soon after the atomic bombing of Hiroshima and Nagasaki and strands of D.N.A. appeared from the mid-1950s. In 1958 he wrote in his Anti-Matter Manifesto: "In the Surrealist period, I wanted to create the iconography of the interior world and the world of the marvelous, of my father Freud. Today, the exterior world and that of physics have transcended the one of psychology. My father today is Dr. Heisenberg." The Disintegration of the Persistence of Memory (1954) harks back to The Persistence of Memory (1931) and in portraying that painting in fragmentation and disintegration has been interpreted as a reference to Heisenberg's quantum mechanics. Endeavors outside painting Dalí was a versatile artist. Some of his more popular works are sculptures and other objects, and he is also noted for his contributions to theater, fashion, and photography, among other areas. Sculptures and other objects From the early 1930s, Dalí was an enthusiastic proponent of the proliferation of three-dimensional Surrealist Objects to subvert perceptions of conventional reality, writing: "museums will fast fill with objects whose uselessness, size and crowding will necessitate the construction, in deserts, of special towers to contain them." His more notable early objects include Board of Demented Associations (1930–31), Retrospective Bust of a Woman (1933), Venus de Milo with Chest of Drawers (1936) and Aphrodisiac Dinner Jacket (1936). Two of the most popular objects of the Surrealist movement were Lobster Telephone (1936) and Mae West Lips Sofa (1937) which were commissioned by art patron Edward James. Lobsters and telephones had strong sexual connotations for Dalí who drew a close analogy between food and sex. The telephone was functional, and James purchased four of them from Dalí to replace the phones in his home. The Mae West Lips Sofa was shaped after the lips of actress Mae West, who was previously the subject of Dalí's watercolor, The Face of Mae West which may be used as a Surrealist Apartment (1934–35). In December 1936 Dalí sent Harpo Marx a Christmas present of a harp with barbed-wire strings. After World War II Dalí authorized