Pegasus another was at Troezen. Hesiod relates how Pegasus was peacefully drinking from a spring when the hero Bellerophon captured him. Hesiod also says Pegasus carried thunderbolts for Zeus. There are several versions of the birth of the winged stallion and his brother Chrysaor in the far distant place at the edge of Earth, Hesiod's "springs of Oceanus, which encircles the inhabited earth, where Perseus found Medusa: One is that they sprang from the blood issuing from Medusa's neck as Perseus was beheading her, similar to the manner in which Athena was born from the head of Zeus. In another version,
Medusa part of their religion. Medusa was beheaded by the hero Perseus, who thereafter used her head, which retained its ability to turn onlookers to stone, as a weapon until he gave it to the goddess Athena to place on her shield. In classical antiquity the image of the head of Medusa appeared in the evil-averting device known as the "Gorgoneion". The three Gorgon sisters—Medusa, Stheno, and Euryale—were all children of the ancient marine deities Phorcys (or "Phorkys") and his sister Ceto (or "Keto"), chthonic monsters from an archaic world. Their genealogy is shared with other sisters, the Graeae, as in