He dropped out of his classical studies and took up art as a self-taught painter. After an abstract-concrete period in Turin, he moved towards informal art.
In 1965-66 came his first three-dimensional installations. Right from 1967 he was a member of Arte Povera, combining natural materials (planking, leaves, earth, stone, wax) with glass and neon, often in the archetypal form of the igloo. To express the growth of organic energy, he adopted the Fibonacci sequence of numbers. His works are now in prestigious museums in Italy and around the world.