Dr Livingstone becomes a dead weight : Out of Darkness, Shining Light, by Petina Gappah

Last week’s opening of the 60th edition of the Venice Biennale marks a watershed for the art world. In much of the festival’s gigantic central exhibition, curated by the Brazilian museum director Adriano Pedrosa, as well as in many of the dozens of independently organised national pavilions and countless collateral events, it more obviously than