Martin Kemp FBA is Emeritus Professor in the History of Art at Oxford University. He has written, broadcast and curated exhibitions on imagery in art and science from the Renaissance to the present day. Books include, The Science of Art: Optical Themes in Western Art from Brunelleschi to Seurat (Yale University Press), and The Human Animal in Western Art and Science (Chicago 2007. He has published extensively on Leonardo da Vinci, including the prize-winning Leonardo da Vinci: The Marvellous Works of Nature and Man (1989 and 2006).He has curated and co-curated a series of exhibitions on Leonardo and other themes, including Spectacular Bodies at the Hayward Gallery in London and Leonardo da Vinci. Experience, Experiment, Design at the Victoria and Albert Museum in 2006 and Seduced. Sex and Art from Antiquity to Now, Barbican Art Gallery London, 2007. Pascal Cotte of Lumiere Technology is an engineer optician and the inventor of the first multi-spectral high definition camera. In 2004, he performed multi-spectral scans of the 'Mona Lisa' in the Louvre Museum. Between 2005 and 2009, his company multi-spectrally scanned Rubens, Gericault, Delacroix, Rembrandt, Chagall, Fragonard, Picasso, Manet, David, Renoir, Van Gogh and over 1500 fine art works from private and public collections. More recently, Cotte used the technology to demonstrate that 'La Bella Principessa', which was believed to be an early 19th century painting, is actually a lost Leonardo Da Vinci artwork.