For forty years, Andy Goldsworthy has worked with an extraordinary range of natural materials, often at their source. On an almost daily basis, he makes works of art using the materials and conditions that he encounters wherever he is, be it the land around his Scottish home, the mountain regions of France or Spain, or the pavements of New York City, Glasgow, or Rio de Janeiro. Out of earth, rocks, leaves, ice, snow, rain, sunlight and shadow he makes...