Making tracks
Richard Long: Heaven and Earth Tate Britain, until 6 September The title of this exhibition may not be exactly modest, but then there is a god-like aspect to all artistic creativity, particularly when it operates in the domain of Land Art. Some practitioners of this genre have literally made the earth move in their excavations and reshapings of nature, others keep their human interventions to a minimum. Richard Long (born 1945) is one of the latter, confining his activities principally to walking and to making tracks in the wild, or leaving behind him cairns of stones. Occasionally he brings back mementoes of his trips to make sculptures or painted installations