Hesiod depicted universe as a chaotic place until the emergence of the divine beings Eros (Love), Abyss (Tartarus) and Erebus (Darkness).
After them, Gaia (Earth) was born who gave birth to Uranos (the Sky).
To keep their eternal life, the Olympian Gods would eat ambrosia and drink nectar. However, in Greek mythology stories, there were also many other smaller gods and deities that lived in the earth.
For example, nymps of the sea lived in the waves and nymphs of the forest lived inside the boles of the trees.
Although he was not considered a god, he had inherited some extra-human powers.