In Hesiod's Theogony, Chaos was the first thing to exist: "at first Chaos came to be" (or was)[10] but next (possibly out of Chaos) came Gaia, Tartarus and Eros (elsewhere the son of Aphrodite).[11] Unambiguously "born" from Chaos were Erebus and Nyx.[12] For Hesiod, Chaos, like Tartarus, though personified enough to have borne children, was also a place, far away, underground and "gloomy", beyond which lived the Titans.[13] And, like the earth, the ocean, and the upper air, it was also capable of being affected by Zeus' thunderbolts.[14]