There is doubt, disagreement, and speculation about what happened to Hephaestus after he had been cast down from heaven. Some say the infant god was cared for by the Oceanid Eurynome and either the Titaness Tethys, Eurynome’s mother, or perhaps by THETIS, a Nereid (daughter of Nereus and Doris) who was to give birth to ACHILLES many years later. It seems certain, though, that Hephaestus grew up on the island of Lemnos, where he learned how to forge metal and make exquisite, intricate objects.