A 100 kilogram pile of ceramic sunflower seeds by Ai Weiwei is to be sold at an estimate of £80,000 to £120,000 Ever since Chinese artist Ai Weiwei opened his installation of 100 million (150 tonnes) ceramic sunflower seeds in Tate’s Turbine Hall, there has been speculation as to when a handful might turn up [...]

Ai Weiwei, Dropping a Han Dynasty Urn (1995). Photograph: Ai Weiwei The cavernous space of Tate Modern’s Turbine Hall has been dwarfed by a massive spider, cleaved by a 167-metre crack and baked by an artificial sun. Now, the gallery has announced, the space is to be filled by its most politically adventurous commission yet.