Practice characterized by the incessant exploration of modes of perceiving. Works, described by the artist as "experimental set-ups", span photography, installation, sculpture and film. In Berlin studio, works with craftsmen, architects, geometers and art historians to test how physical movement, sensory engagement and the interaction of body and brain influence perception of environment. Projects in public space include Green river, realized in various cities between 1998 and 2001; the Serpentine Gallery Pavilion 2007, London, with Kjetil Thorsen; and The New York City Waterfalls, in summer 2008. Recent architectural works are Your rainbow panorama, for ARoS Aarhus Kunstmuseum, and Harpa Reykjavik Concert Hall and Conference Centre, with Henning Larsen Architects. Creator of "Little Sun", a work of art that brings solar-powered light to off-grid areas of the world.