Gaia, known as Earth or Mother Earth (the Greek common noun for "land" is ge or ga). She was an early earth goddess and it is written that Gaia was born from Chaos, the great void of emptiness within the universe, and with her came Eros. She gave birth to Pontus (the Sea) and Uranus (the Sky). This was achieved parthenogenetically (without male intervention). Other versions say that Gaia had as siblings Tartarus (the lowest part of the earth, below Hades itself) and Eros, and without a mate, gave birth to Uranus (Sky), Ourea (Mountains) and Pontus (Sea).

Gaia took as her husband Uranus, who was also her son, and their offspring included the Titans, six sons and six daughters. She gave birth to the Cyclopes and to three monsters that became known as the "Hecatonchires". The spirits of punishment known as the Erinyes were also offspring of Gaia and Uranus. The Gigantes, finally, were conceived after Uranus had been castrated by his son Cronus, and his blood fell to earth from the open wound.

To protect her children from her husband, (the Cyclopes and the Hecatoncheires, as he was fearful of their great strength), Gaia hid them all within herself. One version says that Uranus was aghast at the sight of his offspring so he hid them away in Tartarus, which are the bowels of the earth. Gaia herself found her offspring uncomfortable and at times painful, when the discomfort became to much to bear she asked her youngest son Cronus to help her. She asked him to castrate Uranus, thus severing the union between the Earth and Sky, and also to prevent more monstrous offspring. To help Cronus achieve his goal Gaia produced an adamantine sickle to serve as the weapon. Cronus hid until Uranus came to lie with Gaia and as Uranus drew near, Cronus struck with the sickle, cutting the genitalia from Uranus. Blood fell from the severed genitals and came in contact with the earth and from that union was born the Erinyes (Furies), the Giants and the Meliae (Nymphs of the manna ash trees).  Also Aphrodite the Goddess of Love, who was created when some of the blood fell into the sea.

After the separation of the Earth from the Sky, Gaia gave birth to other offspring, these being fathered by Pontus. Their names were the sea-god Nereus, Thaumas, Phorcys, Ceto and Eurybia. In other versions Gaia had offspring to her brother Tartarus; they were Echidna and Typhon, the later being an enemy of Zeus. Apollo killed Typhon when he took control of the oracle at Delphi, which Gaia originally provided, and then the "Sibyl" sang the oracle in Gaia's shrine.

It was Gaia who saved Zeus from being swallowed by Cronus, after Zeus had been born, Gaia helped Rhea to wrap a stone in swaddling clothes, this was to trick Cronus in to thinking it was Zeus, because Cronus had been informed that one of his children would depose him, and so to get rid of his children he had swallowed them, Gaia's trick worked and Zeus was then taken to Crete.

Gaia being the primordial element from which all the gods originated was worshiped throughout Greece, but later she went into decline and was supplanted by other gods. In Roman mythology she was known as Tellus or Terra.

Many modern Neopagans, particularly Hellenistic Neopagan sects in the United States, 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.

Some who worship Gaia attempt to get closer to Mother Earth by becoming unconcerned with material things and more in tune with nature. Others who worship Gaia recognize Gaia as a great goddess and practice rituals commonly associated with other forms of worship. Many sects worship Gaia, even more than worship Themis, Artemis, and Hera. Some common forms of worship may include prostration, attempting to reach a greater connection to the earth, shamanistic practices, tithing, praising and praying, creating inspired works of art dedicated to the goddess, burning oils and incense, rearing plants and gardens, the creation and maintaining of Sacred Groves, and burning bread or spilling drink as offerings. Other forms of worship may indeed be common, as worship of Gaia is very broad and can take many forms.

The idea that the fertile earth itself is female, nurturing mankind, was not limited to the Mediterranean. In Norse mythology the Great Mother, the mother of Thor himself, was known as Jord. In Lithuanian mythology She is thedaughter of Sun and Moon. Also she is wife of Dangus (Varuna). In Pacific cultures, the Earth Mother was known under as many names and with as many attributes as cultures who revered her for example Maori whose creation myth included Papatuanuku, partner to Ranginui, the Sky Father. In South America, in the Andes, a cult of the Pachamama still survives (in regions of Bolivia, Peru, Ecuador, Argentina and Chile). The name comes from Pacha (Quechua for change, epoch) and Mama (mother). While ancient Mexican cultures referred to mother earth as Tonantzin Tlalli that means "Revered Mother Earth". In Indian religions, the Mother of all creation is called "Gayatri", a surprisingly close form of Gaia.