Gilgamesh is one of the oldest recorded stories in the world. It's about an ancient King of Uruk who may have actually existed and whose name - Gilgamesh - is on the Sumerian King List.
According to the story, Gilgamesh was not just a hero. He was the first superhero! He was part god and part human. He had many special powers.
Here is one little piece of the Epic of Gilgamesh, very loosely retold:
Once upon a time, a long time ago, King Gilgamesh sat alone in his garden, thinking things over. Something was bothering him. He loved being king of all his people. That was good. He was strong enough to pick up mountains, which was handy on occasion. He could dive down to the deepest point in the ocean and back again in one breath! But he could not fly. And he could not live forever.
It was that "could not live forever" part that really got his camel. After all, wasn't he a god? Well, two-thirds of a god?
Maybe it was that, but for whatever reason, Gilgamesh was very bored. He had run out of cities to conquer. All the monsters ran away the minute they heard he was coming. He had nothing to do that was any fun at all except scare his subject silly with his tempers and his tantrums.
The gods looked down and decided that Gilgamesh needed a challenge. They created a really wild man, who was stronger and faster than Gilgamesh. They named their creation Enkidu.