Cerberus

Cerberus was born to Typhon and Echidna, the most terrible monsters in the Greek cosmos. Typhon was a giant with a hundred serpent heads and eyes that shot flame, the last and greatest enemy of Zeus. Echidna was a creature half-woman and half-serpent who lived in a cave beneath the earth. In Hesiod's Theogony, written around 700 BCE, Cerberus is described as fifty-headed, bronze-voiced, and without pity, a creature that eats raw flesh and stands watch before the halls of Hades and Persephone, the queen of the dead. Later poets gave him three heads, a serpent for a tail, and a mane of writhing snakes down his back.

Cerberus had one duty: to guard the boundary. He stood at the gates of the underworld, or sometimes at the mouth of the river Acheron, and his task was absolute. He must allow every dead soul to enter, and he must prevent any from leaving. Hesiod wrote that the hound fawns on all who enter with wagging tail and flattened ears, but lies in wait for any who try to go back out, catching them and eating them whole. He was not evil, merely a guard dog doing his job with terrible efficiency. The dead had nothing to fear; it was the living who tried to cross, or the dead who tried to return, who faced his triple jaws.

The most famous encounter with Cerberus was the twelfth and final labour of Heracles, the hero forced to atone for killing his own family in a fit of madness sent by Hera, the queen of the gods. Eurystheus commanded Heracles to fetch Cerberus from the underworld. Heracles descended to the realm of Hades and asked permission. Hades agreed on one condition: Heracles must subdue Cerberus with nothing but his bare hands. Heracles found the hound at the gates, wrapped his arms around the beast's three necks, and squeezed with all his divine strength until the monster went limp. He then dragged Cerberus up into the daylight, and the hound spewed poisonous foam from his jaws, which fell upon the rocks and sprouted into the aconite plant, the most deadly herb in the Greek world. Eurystheus was so terrified that he hid inside a bronze jar and begged Heracles to return the hound to Hades.

But Heracles was not the only living mortal to pass Cerberus. The musician Orpheus, whose songs could charm the very stones and trees, descended to the underworld to retrieve his dead wife Eurydice. When he reached the gates, he played his lyre, and the music was so beautiful that Cerberus stood still, his three heads drooping in sleep, and Orpheus walked past unmolested. In the Roman tale of Cupid and Psyche, the mortal girl Psyche was sent by Venus to fetch a box of beauty from Persephone. She carried two honey cakes, and when she reached the gates, she tossed one to Cerberus, who stopped his barking to eat it while she slipped inside. On her way out, she tossed the second cake, and the hound let her pass again. The Sibyl of Cumae used the same trick when she guided the Trojan hero Aeneas to the underworld, feeding Cerberus a honey cake laced with soporific herbs that put him into a deep sleep.

Cerberus appears in art from the earliest Greek vases to the mosaics of Pompeii and the poetry of Virgil. In the Aeneid, Virgil placed him at the entrance to the underworld, his three throats booming with barks, his massive bulk blocking the way until the Sibyl threw him the drugged cake. In Dante's Inferno, he stands in the Third Circle of Hell, tearing at the gluttons with his claws. And in modern astronomy, the name Cerberus has been given to features across the solar system, a reminder that the hound who guards the dead still watches at the gates of the unknown. From the caves of Tainaron to the rocks of Scythia, from the lyre of Orpheus to the honey cakes of Psyche, Cerberus remains the eternal watchdog, the final barrier that no soul crosses twice.