Diarmuid Costello is Associate Professor of Philosophy,University of Warwick. He co-edited (with Dominic Willsdon) TheLife and Death of Images: Ethics and Aesthetics (2008),and (with Jonathan Vickery) Art : Key ContemporaryThinkers (2007). His articles have appeared in British Journal of Aesthetics, Journal of Aesthetics and Art Criticism,Critical Inquiry, Rivista di Estetica, and Angelaki. Margaret Iversen is Professor of Art History and Theory,University of Essex. Her books include Beyond Pleasure: Freud,Lacan, Barthes (2007); Alois Riegl: Art History andTheory (1993); Mary Kelly, co-authored with DouglasCrimp and Homi Bhabha (1997). Writing Art History,co-authored with Stephen Melville, is forthcoming. Iversen and Costello are also Co-Directors of the AHRC researchproject "Aesthetics after Photography."