Helmick & Schechter have been collaborating on sculpture projects since 1994. A shared interest in the mechanics of visual perception, especially the consolidating properties of human vision, led the artists to the overarching concept for their first collaboration, Ghostwriter, an interior suspended sculpture. Since then the artists have developed a range of experimental approaches. I've seen their "Impulse" sculpture (2nd image below) in person and they are gorgeous...tons of tiny cast pewter birds make up larger birds that hang beautifully and gracefully in the air...