10 most difficult Greek mythol­o­gy riddles

Bowl of Hygieia is one of the symbols of pharmacy, and along with the Rod of Asclepius it is one of the most ancient and important symbols related to medicine in western countries. Hygieia was the Greek goddess of Health hygiene, and the associate, wife, or daughter of Asclepius. Asclepius' symbol is his rod, with a snake twined around it; correspondingly, Hygieia's symbol is a cup or chalice with a snake twined around its stem and poised above it.

In Greek mythology, Theia, also called Euryphaessa "wide-shining", is a Titaness. Her brother/consort is Hyperion, a Titan and god of the sun, and together they are the parents of Helios (the Sun), Selene (the Moon), and Eos (the Dawn).

In Roman mythology, the Camenae were originally goddesses of childbirth, wells and fountains, and also prophetic deities. There were four Camenae: Carmenta, Egeria, Antevorta and Postverta. The Camenae were later identified with the Greek Muses; in his translation of Homer's Odyssey, Livius Andronicus rendered the Greek word Mousa as Camena.

Euterpe was one of the Muses, the daughters of Mnemosyne, fathered by Zeus. When poets assigned roles to each of the Muses, she was the muse of music. In late Classical times she was named muse of lyric poetry and depicted holding a flute. A few say she invented the aulos or double-flute, though most mythographers credit Marsyas with its invention.

Bellerophon was "the greatest hero and slayer of monsters, alongside Cadmus and Perseus, before the days of Heracles". His greatest feat was killing the Chimera, a monster that Homer depicted with a lion's head, a goat's body, and a serpent's tail: "her breath came out in terrible blasts of burning flame".

According to Homer, Laertes and Anticleia were the parents of Odysseus. He was married to Penelope and they gave birth to a son, Telemachus. Odysseus was often called "Odysseus the Cunning" because of his clever and quick mind. Autolycus, his grandfather, was a famous skilled thief in the Peloponnese.

Near Megara, a robber named Sciron forced travellers along the narrow cliff-face pathway to wash his feet. While they knelt, he kicked them off the cliff behind them, where they were eaten by a sea monster (or, in some versions, a giant turtle). Sciron was killed by Theseus.

Herakles had three wives - Megara, the Theban princess, who he strangled with his children. Hebe, the goddess and the personification of love and grace, and Dejanira, who killed him, and then committed suicide by herself.

Thalia was the Muse who presided over comedy and idyllic poetry. She was portrayed as a young woman with a joyous air, crowned with ivy, wearing boots and holding a comic mask in her hand. Many of her statues also hold a bugle and a trumpet (both used to support the actors' voices in ancient comedy), or occasionally a shepherd’s staff or a wreath of ivy.

In classical mythology, the Cap of Invisibility (lit. dog-skin of Hades) is a helmet or cap that can turn the wearer invisible. The Cap of Invisibility enables the user to become invisible to other supernatural entities, functioning much like the cloud of mist that the gods surround themselves in to become undetectable.