Earth art, also known as land art or environmental art, emerged in the late 1960s and 1970s. Artists created large-scale outdoor works using natural materials such as rocks, soil, and plants, often in remote landscapes. The movement aimed to challenge the traditional art world by emphasizing the connection between art and nature, encouraging viewers to rethink their relationship with the environment. Some well-known earth artists include Robert Smithson, Nancy Holt, and Andy Goldsworthy.