Many Neopagans actively worship Gaia. Beliefs regarding Gaia vary, ranging from the common Wiccan belief that Gaia is the Earth (or in some cases the spiritual embodiment of the earth, or the Goddess of the Earth), to the broader Neopagan belief that Gaia is the goddess of all creation, a Mother Goddess from which all other gods spring. Gaia is sometimes thought to embody the planets and the Earth, and sometimes thought to embody the entire universe. Worship of Gaia is varied, ranging from prostration to druidic ritual. Unlike Zeus, a roving nomad god of the open sky, Gaia was manifest in enclosed spaces: the house, the courtyard, the womb, the cave. Her sacred animals are the serpent, the lunar bull, the pig, and bees. In her hand the narcotic poppy may be transmuted to a pomegranate.
The mythological name was revived in 1969 by James Lovelock, in Gaia: A New Look at Life on Earth; his Gaia hypothesis was supported by Lynn Margulis. The hypothesis proposes that living organisms and inorganic material are part of a dynamic system that shapes the Earth's biosphere, and maintains the Earth as a fit environment for life. In some Gaia theory approaches the Earth itself is viewed as an organism with self-regulatory functions. Further books by Lovelock and others popularized the Gaia Hypothesis, which was widely embraced and passed into common usage as part of the heightened awareness of planetary vulnerability of the 1990s
Gaia Theory is a compelling new way of understanding life on our planet. It argues that we are far more than just the "Third Rock from the Sun," situated precariously between freezing and burning up. The theory asserts that living organisms and their inorganic surroundings have evolved together as a single living system that greatly affects the chemistry and conditions of Earth’s surface. Some scientists believe that this “Gaian system” self-regulates global temperature, atmospheric content, ocean salinity, and other factors in an “automatic” manner. Earth's living system appears to keep conditions on our planet just right for life to persist!
The Gaia hypothesis is an ecological hypothesis that proposes that living and nonliving parts of the earth are a complex interacting system that can be thought of as a single organism. Named after the Greek earth goddess, this hypothesis postulates that all living things have a regulatory effect on the Earth's environment that promotes life overall.
Inspired by the information in: Wikipedia (http://en.wikipedia.org/wiki/Gaia_hypothesis)