The name Gaia has been used for the planet Earth since the late 1960s. It was popularized by James Lovelock, a British scientist, who developed the Gaia hypothesis. This hypothesis states that the Earth's biosphere and atmosphere interact to form a self-regulating system that helps maintain the planet's stability. The name Gaia was chosen because it is the Greek goddess of the Earth. It is a fitting name for the planet because it emphasizes the interconnectedness of all life on Earth and the role of the planet's environment in sustaining life.