The Fernand Léger painting which has been revealed a fake. Photograph: Guggenheim Venice

Physicists have used advanced technology to prove that a valuable painting held in the Peggy Guggenheim Collection in Venice is a fake. They are certa(...)

Visitors talk near Paul Cezanne’s ‘Les Pommes,’ during a preview of Sotheby’s  Impressionist and Modern Art Evening Sale at Sotheby’s in New York. Photograph: Mike Segar/Reuters

The first of New York’s famous spring auctions got off to a strong start with Sotheby’s solid sale of Impressionist and modern art last night t(...)