by Charlotte DURAND Agence France-Presse LONDON, United Kingdom (AFP) – On a frosty morning in London’s Hyde Park, onlookers aim their mobile phones at the top of the Serpentine Gallery. The large sculpture of a blue man sitting on the roof is invisible to the naked eye but it is there — in augmented reality. The sculpture is part of an installation by the American artist Kaws at the gallery, reproduced for the hundreds of […]