Great Lives

Marcel Duchamp - the father of conceptual art, and responsible for that famously provocative urinal signed 'R Mutt, 1917' - is the great life choice of fellow artist Cornelia Parker.She explains to Matthew Parris why he's influenced not only her work but that of so many other artists since his death in 1968. As an art student in the 1970s she recalls the attraction of Duchamp's 'readymades', such as a bicycle wheel or suspended wine bottle rack - manufactured items that the artist selected and modified, antidotes to what he dismissed as conventional 'retinal art'.They are joined by Dawn Ades, Professor of the History of Art at the Royal Academy. She recalls an occasion when she saw him completely absorbed in a game of chess in a café in the Spanish seaside town of Cadaqués, whilst visiting Salvador Dali. They also discuss Duchamp's intriguing female alter ego, Rrose Selavy (Eros, c'est la vie or "physical love is the life") Man Ray's photographs of whom featured in some Surrealist exhibitions.We hear how D