Jennifer Mass is the Andrew W. Mellon Professor of Cultural Heritage Science at the Bard Graduate Center
The ‘Rethinking Guernica’ website allows us to scrutinise Picasso’s anti-war masterpiece in greater detail than ever
It’s not just the Old Masters that get spots – small bumps have started to erupt on modern paintings
A revolution in chemical-imaging techniques is bringing us closer to the original visions of artists such as Van Gogh
