Scottish artist Andy Goldsworthy uses a seemingly infinite array of purely natural materials, from snow and ice to leaves, stone, and twigs in the creation of his one-of-a-kind sculptures. Unlike such artists as Christo and Michael Hiezer, whose works leave definite marks on the landscape, Goldsworthy's approach is to interrupt, shape, or in some other way temporarily alter or work with nature to produce his fragile, mutable pieces. To create "Broken Icicle," for example, Goldsworthy was only able to work on the sculpture in the early morning, when temperatures were below freezing. As with most of his works, ultimately, the materials used to create this piece returned to their natural state, leaving no trace of the artwork's existence save for the stunning photos in this book.