Cronus had defeated his father Uranus, and now he ruled the universe as King of the Titans. At his side was his wife and sister, Rhea, the gentle Titan of motherhood. Everything seemed perfect. The Titans ruled with wisdom, and the world flourished.

But Cronus carried a secret that tormented him every night: the curse of Uranus. "Just as you betrayed me, your own son will one day betray you." Those words echoed in Cronus's mind without rest. He began to have nightmares in which a grown son defeated him, threw him into Tartarus, and took his throne.

And then Rhea was expecting her first baby.

When the first child was born — a girl named Hestia — Rhea held her in her arms with love and joy.

"Look, my husband. Our daughter. Isn't she beautiful?"

But Cronus snatched the baby from Rhea's arms. And before she could cry out, he opened his mouth and swallowed the child whole.

"What have you done?!" Rhea screamed, horrified.

"I have protected my throne," said Cronus coldly. "The curse said my child would defeat me. If I swallow every child, they will stay trapped inside me forever, and the curse can never come true."

"They will die in there," Rhea wept.

"No," said Cronus. "I am immortal. My stomach is immortal. They will live inside me — but they will never be able to challenge me."

And so, one by one, as each baby was born, Cronus swallowed it. Hestia was the first. Then came Demeter, goddess of the harvest. Then Hera, queen of the sky. Then Hades, lord of the deep places. Then Poseidon, lord of the seas. Five children swallowed. Five children trapped in the darkness inside Cronus.

Rhea was heartbroken. Five children lost. And now she was expecting the sixth. "I will not let him take one more," she vowed. She went to Gaia, her mother, the Earth herself.

"Help me, Mother. Cronus is destroying my family."

Gaia, who had watched Uranus imprison her children and now watched Cronus do the same, answered sadly.

"The pattern repeats itself. But this time we will break it. When the child is born, bring it to me. I have a plan."

When the sixth baby was born — a strong, healthy boy — Rhea carried him in secret to the island of Crete and hid him in a cave on Mount Ida. The baby's name was Zeus.

But Cronus was waiting.

"Where is the child, Rhea?"

"Here," said Rhea, holding out a stone wrapped in blankets.

Gaia had found a stone exactly the size of a baby. Cronus was so used to swallowing his children that he did not even look closely: he opened his mouth and gulped the stone down in one swallow. Zeus was safe.

In the cave in Crete, little Zeus was cared for by gentle nymphs. He drank the milk of the magical goat Amalthea. Outside the cave, warriors danced and beat their spears against their shields to drown out the baby's crying, so that Cronus would never hear him.

Zeus grew up strong and clever. He knew he was the son of Cronus. He knew he had brothers and sisters trapped in his father's stomach. And he knew what his destiny was.

When Zeus became a grown god, he left Crete in disguise. With Gaia's help, he became a cupbearer in the palace of Cronus, the young servant who poured the king's drinks. No one suspected who he really was.

One day, Gaia gave Zeus a special potion.

"Put this in Cronus's drink. It will make him give back everything he has swallowed."

Zeus waited for the right moment. During a great banquet of the Titans, he served the special drink to Cronus, who drained it in one gulp. And then the king's stomach began to churn.

"What... what is happening?" cried Cronus.

He began to retch. First came the stone, which Zeus would later set up at Delphi as a monument. Then, one by one, came the children of Cronus — grown now, because they were immortal and had grown inside their father. Poseidon came forth, mighty, his hair the color of the sea. Hades came forth, somber and grave. Hera came forth, majestic as a queen. Demeter came forth, smelling of wheat and rich earth. And last came Hestia, the eldest, gentle and serene.

At last Cronus understood.

"Zeus! You! You are the sixth child. The curse... the curse has come true."

"Yes, Father," said Zeus. "And now you will answer for everything you have done."

The six children of Cronus — Zeus, Poseidon, Hades, Hera, Demeter, and Hestia — joined together. They called themselves the Olympians, because they chose to make their home on the peak of Mount Olympus, the highest mountain in Greece.

"Surrender, Cronus," Zeus declared. "Your time is over. Now begins the age of the Olympians."

But Cronus did not surrender. He called on his Titan brothers.

"Brothers! Together we are invincible. Let us crush these insolent children!"

And so began the Titanomachy, the War of the Titans — the greatest war the cosmos has ever seen.

The war lasted ten years. The Titans fought from the peak of Mount Othrys, the Olympians from the peak of Mount Olympus, and between the two mountains the Earth shook with every battle.

Cronus was immensely powerful, and the Titans were giants long practiced in battle. Hyperion blazed with blinding light. Other Titans raised storms and shook the seas. The Olympians were young and strong, but they were fewer, and they had no weapons yet to match the giants. Year after year, the war stayed deadlocked.

Then Gaia said to Zeus:

"If you want to win, you need the allies Cronus fears. You must free the Cyclopes and the Hecatoncheires from Tartarus."

Zeus descended into Tartarus, the deepest prison of the cosmos. There he overcame the dragon Campe, who guarded the gates, and set free the Cyclopes and the Hecatoncheires.

The Cyclopes were so grateful that they forged gifts for the three brothers. For Zeus they made the Thunderbolt, a perfect and terrible lightning that never missed its mark. For Poseidon they forged the Trident, able to cause earthquakes and command all the seas. For Hades they made the Helm of Darkness, a helmet that made its wearer invisible.

With these weapons, and with the Hecatoncheires — who could hurl a hundred stones at once, one for each arm — the tide of the war turned.

The final battle shook the world. Zeus hurled thunderbolts that tore the sky, and every bolt struck a Titan with devastating force. Poseidon struck the ground with his trident, and earthquakes brought mountains crashing down. Hades, invisible, attacked without warning. The Hecatoncheires flung enormous stones that fell like deadly hail upon their enemies.

The Titans fought bravely, but they could not win. One by one, they fell. Last of all, Cronus faced Zeus directly. Father against son. The old king against the new.

"You cannot defeat me!" roared Cronus. "I am your father. I am Time itself."

"The time of your reign is over," Zeus answered.

And he hurled his mightiest thunderbolt. Cronus fell.

The defeated Titans were carried down to Tartarus, the same prison where the Cyclopes and the Hecatoncheires had suffered for so long. Cronus, who had imprisoned his children inside himself, was now imprisoned in the depths of the Earth. And the Hecatoncheires became the guards of Tartarus, so that the Titans could never escape.

Not all the Titans were punished, though. Some had stayed neutral in the war, and others had even helped the Olympians. Oceanus and his wife Tethys remained at peace in the seas. Prometheus, son of the Titan Iapetus, had fought at Zeus's side. And Themis, the Titan of justice, was honored and respected.

With the victory complete, the three brothers divided the cosmos by lot. To Zeus fell the Sky, and he would be King of the Gods. To Poseidon fell the Seas and all the oceans. To Hades fell the Underworld, the realm of the dead. The Earth would belong to all of them, shared ground.

Zeus climbed to the peak of Mount Olympus and built a magnificent palace there. The Olympians would make that mountain their home. A new age had begun: the Age of the Olympian Gods.

But Gaia watched it all with sadness. "First Uranus imprisoned his children. Then Cronus. Now Zeus does the same to the Titans. When will this cycle end?" She did not know it yet, but there would be more wars and more trials. And Zeus would have to prove that he was different from his father and his grandfather.