interview and photography by OLIVIER ZAHM All artwork images copyright Tom Sachs and Barbara Gladstone Gallery, New York. All works by Tom Sachs in his studio, New York TOM SACHS’s hidden studio on Centre Street in downtown New York is a giant evolving artwork in its own right. Like a homemade fractal, each element of the studio — from an artwork in progress to an entire room bustling with assistants — acts as a part of the fragmented panorama of his social laboratory. When I visited the studio, everyone was working on Sachs’s expansive, interactive exhibition, ASTRONAUTS TRAINING MANUAL, SPACE PROGRAM 2.0: MARS. It will be co-presented in New York at Creative Time and the Park Avenue Armory from May to June 2012. This clandestine atelier felt like the galleys of a spaceship on its odyssey, as the memories in — and projections of — Sachs’s multifaceted mnemonic…